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<!DOCTYPE html>
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<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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<title>Database Caching Class — CodeIgniter 3.1.11 documentation</title>
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<link rel="shortcut icon" href="../_static/ci-icon.ico"/>
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<link href='https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic|Roboto+Slab:400,700|Inconsolata:400,700&subset=latin,cyrillic' rel='stylesheet' type='text/css'>
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<link rel="top" title="CodeIgniter 3.1.11 documentation" href="../index.html"/>
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<link rel="up" title="Database Reference" href="index.html"/>
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<link rel="next" title="Database Forge Class" href="forge.html"/>
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<link rel="prev" title="Custom Function Calls" href="call_function.html"/>
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<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
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</ul>
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</ul>
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
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||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
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</ul>
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</li>
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</ul>
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<ul class="current">
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<li class="toctree-l1 current"><a class="reference internal" href="index.html">Database Reference</a><ul class="current">
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<li class="toctree-l2"><a class="reference internal" href="examples.html">Quick Start: Usage Examples</a></li>
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<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
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<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
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<li class="toctree-l2"><a class="reference internal" href="queries.html">Running Queries</a></li>
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<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
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<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
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<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="transactions.html">Transactions</a></li>
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<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting MetaData</a></li>
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<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
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<li class="toctree-l2 current"><a class="current reference internal" href="#">Query Caching</a></li>
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<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
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<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
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</ul>
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</li>
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</ul>
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
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||||
</ul>
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||||
</li>
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</ul>
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</div>
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<img src="data:image/jpeg;base64,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" title="Toggle Table of Contents" alt="Toggle Table of Contents" />
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<a href="../index.html" class="fa fa-home"> CodeIgniter</a>
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/upgrading.html">Upgrading From a Previous Version</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/troubleshooting.html">Troubleshooting</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../overview/index.html">CodeIgniter Overview</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../overview/getting_started.html">Getting Started</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/at_a_glance.html">CodeIgniter at a Glance</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../overview/features.html">Supported Features</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/appflow.html">Application Flow Chart</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../overview/mvc.html">Model-View-Controller</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../tutorial/static_pages.html">Static pages</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../tutorial/news_section.html">News section</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../tutorial/create_news_items.html">Create news items</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
|
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</ul>
|
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|
||||
</ul>
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<ul>
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||||
<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
|
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</ul>
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</li>
|
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</ul>
|
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<ul>
|
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<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul class="current">
|
||||
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Database Reference</a><ul class="current">
|
||||
<li class="toctree-l2"><a class="reference internal" href="examples.html">Quick Start: Usage Examples</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="queries.html">Running Queries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="transactions.html">Transactions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting MetaData</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
|
||||
<li class="toctree-l2 current"><a class="current reference internal" href="#">Query Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
|
||||
|
||||
|
||||
</div>
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||||
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||||
</nav>
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<section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
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<nav class="wy-nav-top" role="navigation" aria-label="top navigation">
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<a href="../index.html">CodeIgniter</a>
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</nav>
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<div class="rst-content">
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<div role="navigation" aria-label="breadcrumbs navigation">
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||||
<ul class="wy-breadcrumbs">
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||||
<li><a href="../index.html">Docs</a> »</li>
|
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|
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<li><a href="index.html">Database Reference</a> »</li>
|
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||||
<li>Database Caching Class</li>
|
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<li class="wy-breadcrumbs-aside">
|
||||
|
||||
</li>
|
||||
<div style="float:right;margin-left:5px;" id="closeMe">
|
||||
<img title="Classic Layout" alt="classic layout" src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" />
|
||||
</div>
|
||||
</ul>
|
||||
<hr/>
|
||||
</div>
|
||||
<div role="main" class="document">
|
||||
|
||||
<div class="section" id="database-caching-class">
|
||||
<h1>Database Caching Class<a class="headerlink" href="#database-caching-class" title="Permalink to this headline">¶</a></h1>
|
||||
<p>The Database Caching Class permits you to cache your queries as text
|
||||
files for reduced database load.</p>
|
||||
<div class="admonition important">
|
||||
<p class="first admonition-title">Important</p>
|
||||
<p class="last">This class is initialized automatically by the database
|
||||
driver when caching is enabled. Do NOT load this class manually.</p>
|
||||
</div>
|
||||
<div class="admonition important">
|
||||
<p class="first admonition-title">Important</p>
|
||||
<p class="last">Not all query result functions are available when you
|
||||
use caching. Please read this page carefully.</p>
|
||||
</div>
|
||||
<div class="section" id="enabling-caching">
|
||||
<h2>Enabling Caching<a class="headerlink" href="#enabling-caching" title="Permalink to this headline">¶</a></h2>
|
||||
<p>Caching is enabled in three steps:</p>
|
||||
<ul class="simple">
|
||||
<li>Create a writable directory on your server where the cache files can
|
||||
be stored.</li>
|
||||
<li>Set the path to your cache folder in your
|
||||
application/config/database.php file.</li>
|
||||
<li>Enable the caching feature, either globally by setting the preference
|
||||
in your application/config/database.php file, or manually as
|
||||
described below.</li>
|
||||
</ul>
|
||||
<p>Once enabled, caching will happen automatically whenever a page is
|
||||
loaded that contains database queries.</p>
|
||||
</div>
|
||||
<div class="section" id="how-does-caching-work">
|
||||
<h2>How Does Caching Work?<a class="headerlink" href="#how-does-caching-work" title="Permalink to this headline">¶</a></h2>
|
||||
<p>CodeIgniter’s query caching system happens dynamically when your pages
|
||||
are viewed. When caching is enabled, the first time a web page is
|
||||
loaded, the query result object will be serialized and stored in a text
|
||||
file on your server. The next time the page is loaded the cache file
|
||||
will be used instead of accessing your database. Your database usage can
|
||||
effectively be reduced to zero for any pages that have been cached.</p>
|
||||
<p>Only read-type (SELECT) queries can be cached, since these are the only
|
||||
type of queries that produce a result. Write-type (INSERT, UPDATE, etc.)
|
||||
queries, since they don’t generate a result, will not be cached by the
|
||||
system.</p>
|
||||
<p>Cache files DO NOT expire. Any queries that have been cached will remain
|
||||
cached until you delete them. The caching system permits you clear
|
||||
caches associated with individual pages, or you can delete the entire
|
||||
collection of cache files. Typically you’ll want to use the housekeeping
|
||||
functions described below to delete cache files after certain events
|
||||
take place, like when you’ve added new information to your database.</p>
|
||||
</div>
|
||||
<div class="section" id="will-caching-improve-your-site-s-performance">
|
||||
<h2>Will Caching Improve Your Site’s Performance?<a class="headerlink" href="#will-caching-improve-your-site-s-performance" title="Permalink to this headline">¶</a></h2>
|
||||
<p>Getting a performance gain as a result of caching depends on many
|
||||
factors. If you have a highly optimized database under very little load,
|
||||
you probably won’t see a performance boost. If your database is under
|
||||
heavy use you probably will see an improved response, assuming your
|
||||
file-system is not overly taxed. Remember that caching simply changes
|
||||
how your information is retrieved, shifting it from being a database
|
||||
operation to a file-system one.</p>
|
||||
<p>In some clustered server environments, for example, caching may be
|
||||
detrimental since file-system operations are so intense. On single
|
||||
servers in shared environments, caching will probably be beneficial.
|
||||
Unfortunately there is no single answer to the question of whether you
|
||||
should cache your database. It really depends on your situation.</p>
|
||||
</div>
|
||||
<div class="section" id="how-are-cache-files-stored">
|
||||
<h2>How are Cache Files Stored?<a class="headerlink" href="#how-are-cache-files-stored" title="Permalink to this headline">¶</a></h2>
|
||||
<p>CodeIgniter places the result of EACH query into its own cache file.
|
||||
Sets of cache files are further organized into sub-folders corresponding
|
||||
to your controller functions. To be precise, the sub-folders are named
|
||||
identically to the first two segments of your URI (the controller class
|
||||
name and function name).</p>
|
||||
<p>For example, let’s say you have a controller called blog with a function
|
||||
called comments that contains three queries. The caching system will
|
||||
create a cache folder called blog+comments, into which it will write
|
||||
three cache files.</p>
|
||||
<p>If you use dynamic queries that change based on information in your URI
|
||||
(when using pagination, for example), each instance of the query will
|
||||
produce its own cache file. It’s possible, therefore, to end up with
|
||||
many times more cache files than you have queries.</p>
|
||||
</div>
|
||||
<div class="section" id="managing-your-cache-files">
|
||||
<h2>Managing your Cache Files<a class="headerlink" href="#managing-your-cache-files" title="Permalink to this headline">¶</a></h2>
|
||||
<p>Since cache files do not expire, you’ll need to build deletion routines
|
||||
into your application. For example, let’s say you have a blog that
|
||||
allows user commenting. Whenever a new comment is submitted you’ll want
|
||||
to delete the cache files associated with the controller function that
|
||||
serves up your comments. You’ll find two delete functions described
|
||||
below that help you clear data.</p>
|
||||
</div>
|
||||
<div class="section" id="not-all-database-functions-work-with-caching">
|
||||
<h2>Not All Database Functions Work with Caching<a class="headerlink" href="#not-all-database-functions-work-with-caching" title="Permalink to this headline">¶</a></h2>
|
||||
<p>Lastly, we need to point out that the result object that is cached is a
|
||||
simplified version of the full result object. For that reason, some of
|
||||
the query result functions are not available for use.</p>
|
||||
<p>The following functions ARE NOT available when using a cached result
|
||||
object:</p>
|
||||
<ul class="simple">
|
||||
<li>num_fields()</li>
|
||||
<li>field_names()</li>
|
||||
<li>field_data()</li>
|
||||
<li>free_result()</li>
|
||||
</ul>
|
||||
<p>Also, the two database resources (result_id and conn_id) are not
|
||||
available when caching, since result resources only pertain to run-time
|
||||
operations.</p>
|
||||
<div class="section" id="function-reference">
|
||||
<h3>Function Reference<a class="headerlink" href="#function-reference" title="Permalink to this headline">¶</a></h3>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="this-db-cache-on-this-db-cache-off">
|
||||
<h2>$this->db->cache_on() / $this->db->cache_off()<a class="headerlink" href="#this-db-cache-on-this-db-cache-off" title="Permalink to this headline">¶</a></h2>
|
||||
<p>Manually enables/disables caching. This can be useful if you want to
|
||||
keep certain queries from being cached. Example:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="c1">// Turn caching on</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">cache_on</span><span class="p">();</span>
|
||||
<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s2">"SELECT * FROM mytable"</span><span class="p">);</span>
|
||||
|
||||
<span class="c1">// Turn caching off for this one query</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">cache_off</span><span class="p">();</span>
|
||||
<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s2">"SELECT * FROM members WHERE member_id = '</span><span class="si">$current_user</span><span class="s2">'"</span><span class="p">);</span>
|
||||
|
||||
<span class="c1">// Turn caching back on</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">cache_on</span><span class="p">();</span>
|
||||
<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s2">"SELECT * FROM another_table"</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="this-db-cache-delete">
|
||||
<h2>$this->db->cache_delete()<a class="headerlink" href="#this-db-cache-delete" title="Permalink to this headline">¶</a></h2>
|
||||
<p>Deletes the cache files associated with a particular page. This is
|
||||
useful if you need to clear caching after you update your database.</p>
|
||||
<p>The caching system saves your cache files to folders that correspond to
|
||||
the URI of the page you are viewing. For example, if you are viewing a
|
||||
page at example.com/index.php/blog/comments, the caching system will put
|
||||
all cache files associated with it in a folder called blog+comments. To
|
||||
delete those particular cache files you will use:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">cache_delete</span><span class="p">(</span><span class="s1">'blog'</span><span class="p">,</span> <span class="s1">'comments'</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>If you do not use any parameters the current URI will be used when
|
||||
determining what should be cleared.</p>
|
||||
</div>
|
||||
<div class="section" id="this-db-cache-delete-all">
|
||||
<h2>$this->db->cache_delete_all()<a class="headerlink" href="#this-db-cache-delete-all" title="Permalink to this headline">¶</a></h2>
|
||||
<p>Clears all existing cache files. Example:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">cache_delete_all</span><span class="p">();</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
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||||
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||||
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||||
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||||
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|
||||
|
||||
|
||||
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|
||||
|
||||
<div role="contentinfo">
|
||||
<p>
|
||||
© Copyright 2014 - 2019, British Columbia Institute of Technology.
|
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Last updated on Sep 19, 2019.
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<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul class="current">
|
||||
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Database Reference</a><ul class="current">
|
||||
<li class="toctree-l2"><a class="reference internal" href="examples.html">Quick Start: Usage Examples</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="queries.html">Running Queries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="transactions.html">Transactions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting MetaData</a></li>
|
||||
<li class="toctree-l2 current"><a class="current reference internal" href="#">Custom Function Calls</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="caching.html">Query Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
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||||
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<img src="data:image/jpeg;base64,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" title="Toggle Table of Contents" alt="Toggle Table of Contents" />
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<nav data-toggle="wy-nav-shift" class="wy-nav-side">
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<a href="../index.html" class="fa fa-home"> CodeIgniter</a>
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<div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation">
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<ul>
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||||
<li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a></li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/upgrading.html">Upgrading From a Previous Version</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/troubleshooting.html">Troubleshooting</a></li>
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/at_a_glance.html">CodeIgniter at a Glance</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/features.html">Supported Features</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/appflow.html">Application Flow Chart</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/mvc.html">Model-View-Controller</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
|
||||
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|
||||
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||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
|
||||
</ul>
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||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
|
||||
</ul>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
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|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul class="current">
|
||||
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Database Reference</a><ul class="current">
|
||||
<li class="toctree-l2"><a class="reference internal" href="examples.html">Quick Start: Usage Examples</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="queries.html">Running Queries</a></li>
|
||||
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|
||||
<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="transactions.html">Transactions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting MetaData</a></li>
|
||||
<li class="toctree-l2 current"><a class="current reference internal" href="#">Custom Function Calls</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="caching.html">Query Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
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|
||||
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|
||||
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||||
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|
||||
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|
||||
</li>
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<ul class="wy-breadcrumbs">
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<li><a href="../index.html">Docs</a> »</li>
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||||
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<li><a href="index.html">Database Reference</a> »</li>
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||||
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<li>Custom Function Calls</li>
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<hr/>
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<div role="main" class="document">
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||||
<div class="section" id="custom-function-calls">
|
||||
<h1>Custom Function Calls<a class="headerlink" href="#custom-function-calls" title="Permalink to this headline">¶</a></h1>
|
||||
<div class="section" id="this-db-call-function">
|
||||
<h2>$this->db->call_function();<a class="headerlink" href="#this-db-call-function" title="Permalink to this headline">¶</a></h2>
|
||||
<p>This function enables you to call PHP database functions that are not
|
||||
natively included in CodeIgniter, in a platform independent manner. For
|
||||
example, let’s say you want to call the mysql_get_client_info()
|
||||
function, which is <strong>not</strong> natively supported by CodeIgniter. You could
|
||||
do so like this:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">call_function</span><span class="p">(</span><span class="s1">'get_client_info'</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>You must supply the name of the function, <strong>without</strong> the mysql_
|
||||
prefix, in the first parameter. The prefix is added automatically based
|
||||
on which database driver is currently being used. This permits you to
|
||||
run the same function on different database platforms. Obviously not all
|
||||
function calls are identical between platforms, so there are limits to
|
||||
how useful this function can be in terms of portability.</p>
|
||||
<p>Any parameters needed by the function you are calling will be added to
|
||||
the second parameter.</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">call_function</span><span class="p">(</span><span class="s1">'some_function'</span><span class="p">,</span> <span class="nv">$param1</span><span class="p">,</span> <span class="nv">$param2</span><span class="p">,</span> <span class="nx">etc</span><span class="o">..</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>Often, you will either need to supply a database connection ID or a
|
||||
database result ID. The connection ID can be accessed using:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">conn_id</span><span class="p">;</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>The result ID can be accessed from within your result object, like this:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s2">"SOME QUERY"</span><span class="p">);</span>
|
||||
|
||||
<span class="nv">$query</span><span class="o">-></span><span class="na">result_id</span><span class="p">;</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
|
||||
</div>
|
||||
<footer>
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||||
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||||
<div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
|
||||
|
||||
<a href="caching.html" class="btn btn-neutral float-right" title="Database Caching Class">Next <span class="fa fa-arrow-circle-right"></span></a>
|
||||
|
||||
|
||||
<a href="metadata.html" class="btn btn-neutral" title="Database Metadata"><span class="fa fa-arrow-circle-left"></span> Previous</a>
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
<hr/>
|
||||
|
||||
<div role="contentinfo">
|
||||
<p>
|
||||
© Copyright 2014 - 2019, British Columbia Institute of Technology.
|
||||
Last updated on Sep 19, 2019.
|
||||
</p>
|
||||
</div>
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Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>.
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758
user_guide/database/configuration.html
Executable file
758
user_guide/database/configuration.html
Executable file
@ -0,0 +1,758 @@
|
||||
|
||||
|
||||
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||||
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|
||||
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<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
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||||
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|
||||
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||||
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|
||||
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|
||||
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|
||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
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||||
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||||
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||||
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|
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
|
||||
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|
||||
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||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul class="current">
|
||||
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Database Reference</a><ul class="current">
|
||||
<li class="toctree-l2"><a class="reference internal" href="examples.html">Quick Start: Usage Examples</a></li>
|
||||
<li class="toctree-l2 current"><a class="current reference internal" href="#">Database Configuration</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="queries.html">Running Queries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="transactions.html">Transactions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting MetaData</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="caching.html">Query Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
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|
||||
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|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
|
||||
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|
||||
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<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/features.html">Supported Features</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/mvc.html">Model-View-Controller</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
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||||
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<ul>
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||||
<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li>
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||||
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul class="current">
|
||||
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Database Reference</a><ul class="current">
|
||||
<li class="toctree-l2"><a class="reference internal" href="examples.html">Quick Start: Usage Examples</a></li>
|
||||
<li class="toctree-l2 current"><a class="current reference internal" href="#">Database Configuration</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="queries.html">Running Queries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="transactions.html">Transactions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting MetaData</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="caching.html">Query Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
|
||||
</ul>
|
||||
</li>
|
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|
||||
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||||
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</div>
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</nav>
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<section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
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<div role="navigation" aria-label="breadcrumbs navigation">
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<ul class="wy-breadcrumbs">
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<li><a href="../index.html">Docs</a> »</li>
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<hr/>
|
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</div>
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<div role="main" class="document">
|
||||
|
||||
<div class="section" id="database-configuration">
|
||||
<h1>Database Configuration<a class="headerlink" href="#database-configuration" title="Permalink to this headline">¶</a></h1>
|
||||
<p>CodeIgniter has a config file that lets you store your database
|
||||
connection values (username, password, database name, etc.). The config
|
||||
file is located at application/config/database.php. You can also set
|
||||
database connection values for specific
|
||||
<a class="reference internal" href="../libraries/config.html"><span class="doc">environments</span></a> by placing <strong>database.php</strong>
|
||||
in the respective environment config folder.</p>
|
||||
<p>The config settings are stored in a multi-dimensional array with this
|
||||
prototype:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$db</span><span class="p">[</span><span class="s1">'default'</span><span class="p">]</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
|
||||
<span class="s1">'dsn'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'hostname'</span> <span class="o">=></span> <span class="s1">'localhost'</span><span class="p">,</span>
|
||||
<span class="s1">'username'</span> <span class="o">=></span> <span class="s1">'root'</span><span class="p">,</span>
|
||||
<span class="s1">'password'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'database'</span> <span class="o">=></span> <span class="s1">'database_name'</span><span class="p">,</span>
|
||||
<span class="s1">'dbdriver'</span> <span class="o">=></span> <span class="s1">'mysqli'</span><span class="p">,</span>
|
||||
<span class="s1">'dbprefix'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'pconnect'</span> <span class="o">=></span> <span class="k">TRUE</span><span class="p">,</span>
|
||||
<span class="s1">'db_debug'</span> <span class="o">=></span> <span class="k">TRUE</span><span class="p">,</span>
|
||||
<span class="s1">'cache_on'</span> <span class="o">=></span> <span class="k">FALSE</span><span class="p">,</span>
|
||||
<span class="s1">'cachedir'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'char_set'</span> <span class="o">=></span> <span class="s1">'utf8'</span><span class="p">,</span>
|
||||
<span class="s1">'dbcollat'</span> <span class="o">=></span> <span class="s1">'utf8_general_ci'</span><span class="p">,</span>
|
||||
<span class="s1">'swap_pre'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'encrypt'</span> <span class="o">=></span> <span class="k">FALSE</span><span class="p">,</span>
|
||||
<span class="s1">'compress'</span> <span class="o">=></span> <span class="k">FALSE</span><span class="p">,</span>
|
||||
<span class="s1">'stricton'</span> <span class="o">=></span> <span class="k">FALSE</span><span class="p">,</span>
|
||||
<span class="s1">'failover'</span> <span class="o">=></span> <span class="k">array</span><span class="p">()</span>
|
||||
<span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>Some database drivers (such as PDO, PostgreSQL, Oracle, ODBC) might
|
||||
require a full DSN string to be provided. If that is the case, you
|
||||
should use the ‘dsn’ configuration setting, as if you’re using the
|
||||
driver’s underlying native PHP extension, like this:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="c1">// PDO</span>
|
||||
<span class="nv">$db</span><span class="p">[</span><span class="s1">'default'</span><span class="p">][</span><span class="s1">'dsn'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'pgsql:host=localhost;port=5432;dbname=database_name'</span><span class="p">;</span>
|
||||
|
||||
<span class="c1">// Oracle</span>
|
||||
<span class="nv">$db</span><span class="p">[</span><span class="s1">'default'</span><span class="p">][</span><span class="s1">'dsn'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'//localhost/XE'</span><span class="p">;</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">If you do not specify a DSN string for a driver that requires it, CodeIgniter
|
||||
will try to build it with the rest of the provided settings.</p>
|
||||
</div>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">If you provide a DSN string and it is missing some valid settings (e.g. the
|
||||
database character set), which are present in the rest of the configuration
|
||||
fields, CodeIgniter will append them.</p>
|
||||
</div>
|
||||
<p>You can also specify failovers for the situation when the main connection cannot connect for some reason.
|
||||
These failovers can be specified by setting the failover for a connection like this:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$db</span><span class="p">[</span><span class="s1">'default'</span><span class="p">][</span><span class="s1">'failover'</span><span class="p">]</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
|
||||
<span class="k">array</span><span class="p">(</span>
|
||||
<span class="s1">'hostname'</span> <span class="o">=></span> <span class="s1">'localhost1'</span><span class="p">,</span>
|
||||
<span class="s1">'username'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'password'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'database'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'dbdriver'</span> <span class="o">=></span> <span class="s1">'mysqli'</span><span class="p">,</span>
|
||||
<span class="s1">'dbprefix'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'pconnect'</span> <span class="o">=></span> <span class="k">TRUE</span><span class="p">,</span>
|
||||
<span class="s1">'db_debug'</span> <span class="o">=></span> <span class="k">TRUE</span><span class="p">,</span>
|
||||
<span class="s1">'cache_on'</span> <span class="o">=></span> <span class="k">FALSE</span><span class="p">,</span>
|
||||
<span class="s1">'cachedir'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'char_set'</span> <span class="o">=></span> <span class="s1">'utf8'</span><span class="p">,</span>
|
||||
<span class="s1">'dbcollat'</span> <span class="o">=></span> <span class="s1">'utf8_general_ci'</span><span class="p">,</span>
|
||||
<span class="s1">'swap_pre'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'encrypt'</span> <span class="o">=></span> <span class="k">FALSE</span><span class="p">,</span>
|
||||
<span class="s1">'compress'</span> <span class="o">=></span> <span class="k">FALSE</span><span class="p">,</span>
|
||||
<span class="s1">'stricton'</span> <span class="o">=></span> <span class="k">FALSE</span>
|
||||
<span class="p">),</span>
|
||||
<span class="k">array</span><span class="p">(</span>
|
||||
<span class="s1">'hostname'</span> <span class="o">=></span> <span class="s1">'localhost2'</span><span class="p">,</span>
|
||||
<span class="s1">'username'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'password'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'database'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'dbdriver'</span> <span class="o">=></span> <span class="s1">'mysqli'</span><span class="p">,</span>
|
||||
<span class="s1">'dbprefix'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'pconnect'</span> <span class="o">=></span> <span class="k">TRUE</span><span class="p">,</span>
|
||||
<span class="s1">'db_debug'</span> <span class="o">=></span> <span class="k">TRUE</span><span class="p">,</span>
|
||||
<span class="s1">'cache_on'</span> <span class="o">=></span> <span class="k">FALSE</span><span class="p">,</span>
|
||||
<span class="s1">'cachedir'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'char_set'</span> <span class="o">=></span> <span class="s1">'utf8'</span><span class="p">,</span>
|
||||
<span class="s1">'dbcollat'</span> <span class="o">=></span> <span class="s1">'utf8_general_ci'</span><span class="p">,</span>
|
||||
<span class="s1">'swap_pre'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'encrypt'</span> <span class="o">=></span> <span class="k">FALSE</span><span class="p">,</span>
|
||||
<span class="s1">'compress'</span> <span class="o">=></span> <span class="k">FALSE</span><span class="p">,</span>
|
||||
<span class="s1">'stricton'</span> <span class="o">=></span> <span class="k">FALSE</span>
|
||||
<span class="p">)</span>
|
||||
<span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>You can specify as many failovers as you like.</p>
|
||||
<p>The reason we use a multi-dimensional array rather than a more simple
|
||||
one is to permit you to optionally store multiple sets of connection
|
||||
values. If, for example, you run multiple environments (development,
|
||||
production, test, etc.) under a single installation, you can set up a
|
||||
connection group for each, then switch between groups as needed. For
|
||||
example, to set up a “test” environment you would do this:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$db</span><span class="p">[</span><span class="s1">'test'</span><span class="p">]</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
|
||||
<span class="s1">'dsn'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'hostname'</span> <span class="o">=></span> <span class="s1">'localhost'</span><span class="p">,</span>
|
||||
<span class="s1">'username'</span> <span class="o">=></span> <span class="s1">'root'</span><span class="p">,</span>
|
||||
<span class="s1">'password'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'database'</span> <span class="o">=></span> <span class="s1">'database_name'</span><span class="p">,</span>
|
||||
<span class="s1">'dbdriver'</span> <span class="o">=></span> <span class="s1">'mysqli'</span><span class="p">,</span>
|
||||
<span class="s1">'dbprefix'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'pconnect'</span> <span class="o">=></span> <span class="k">TRUE</span><span class="p">,</span>
|
||||
<span class="s1">'db_debug'</span> <span class="o">=></span> <span class="k">TRUE</span><span class="p">,</span>
|
||||
<span class="s1">'cache_on'</span> <span class="o">=></span> <span class="k">FALSE</span><span class="p">,</span>
|
||||
<span class="s1">'cachedir'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'char_set'</span> <span class="o">=></span> <span class="s1">'utf8'</span><span class="p">,</span>
|
||||
<span class="s1">'dbcollat'</span> <span class="o">=></span> <span class="s1">'utf8_general_ci'</span><span class="p">,</span>
|
||||
<span class="s1">'swap_pre'</span> <span class="o">=></span> <span class="s1">''</span><span class="p">,</span>
|
||||
<span class="s1">'compress'</span> <span class="o">=></span> <span class="k">FALSE</span><span class="p">,</span>
|
||||
<span class="s1">'encrypt'</span> <span class="o">=></span> <span class="k">FALSE</span><span class="p">,</span>
|
||||
<span class="s1">'stricton'</span> <span class="o">=></span> <span class="k">FALSE</span><span class="p">,</span>
|
||||
<span class="s1">'failover'</span> <span class="o">=></span> <span class="k">array</span><span class="p">()</span>
|
||||
<span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>Then, to globally tell the system to use that group you would set this
|
||||
variable located in the config file:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$active_group</span> <span class="o">=</span> <span class="s1">'test'</span><span class="p">;</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">The name ‘test’ is arbitrary. It can be anything you want. By
|
||||
default we’ve used the word “default” for the primary connection,
|
||||
but it too can be renamed to something more relevant to your project.</p>
|
||||
</div>
|
||||
<div class="section" id="query-builder">
|
||||
<h2>Query Builder<a class="headerlink" href="#query-builder" title="Permalink to this headline">¶</a></h2>
|
||||
<p>The <a class="reference internal" href="query_builder.html"><span class="doc">Query Builder Class</span></a> is globally enabled or
|
||||
disabled by setting the $query_builder variable in the database
|
||||
configuration file to TRUE/FALSE (boolean). The default setting is TRUE.
|
||||
If you are not using the
|
||||
query builder class, setting it to FALSE will utilize fewer resources
|
||||
when the database classes are initialized.</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query_builder</span> <span class="o">=</span> <span class="k">TRUE</span><span class="p">;</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">that some CodeIgniter classes such as Sessions require Query
|
||||
Builder to be enabled to access certain functionality.</p>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="explanation-of-values">
|
||||
<h2>Explanation of Values:<a class="headerlink" href="#explanation-of-values" title="Permalink to this headline">¶</a></h2>
|
||||
<table border="1" class="docutils">
|
||||
<colgroup>
|
||||
<col width="17%" />
|
||||
<col width="83%" />
|
||||
</colgroup>
|
||||
<thead valign="bottom">
|
||||
<tr class="row-odd"><th class="head">Name Config</th>
|
||||
<th class="head">Description</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody valign="top">
|
||||
<tr class="row-even"><td><strong>dsn</strong></td>
|
||||
<td>The DSN connect string (an all-in-one configuration sequence).</td>
|
||||
</tr>
|
||||
<tr class="row-odd"><td><strong>hostname</strong></td>
|
||||
<td>The hostname of your database server. Often this is ‘localhost’.</td>
|
||||
</tr>
|
||||
<tr class="row-even"><td><strong>username</strong></td>
|
||||
<td>The username used to connect to the database.</td>
|
||||
</tr>
|
||||
<tr class="row-odd"><td><strong>password</strong></td>
|
||||
<td>The password used to connect to the database.</td>
|
||||
</tr>
|
||||
<tr class="row-even"><td><strong>database</strong></td>
|
||||
<td>The name of the database you want to connect to.</td>
|
||||
</tr>
|
||||
<tr class="row-odd"><td><strong>dbdriver</strong></td>
|
||||
<td>The database type. ie: mysqli, postgre, odbc, etc. Must be specified in lower case.</td>
|
||||
</tr>
|
||||
<tr class="row-even"><td><strong>dbprefix</strong></td>
|
||||
<td>An optional table prefix which will added to the table name when running
|
||||
<a class="reference internal" href="query_builder.html"><span class="doc">Query Builder</span></a> queries. This permits multiple CodeIgniter
|
||||
installations to share one database.</td>
|
||||
</tr>
|
||||
<tr class="row-odd"><td><strong>pconnect</strong></td>
|
||||
<td>TRUE/FALSE (boolean) - Whether to use a persistent connection.</td>
|
||||
</tr>
|
||||
<tr class="row-even"><td><strong>db_debug</strong></td>
|
||||
<td>TRUE/FALSE (boolean) - Whether database errors should be displayed.</td>
|
||||
</tr>
|
||||
<tr class="row-odd"><td><strong>cache_on</strong></td>
|
||||
<td>TRUE/FALSE (boolean) - Whether database query caching is enabled,
|
||||
see also <a class="reference internal" href="caching.html"><span class="doc">Database Caching Class</span></a>.</td>
|
||||
</tr>
|
||||
<tr class="row-even"><td><strong>cachedir</strong></td>
|
||||
<td>The absolute server path to your database query cache directory.</td>
|
||||
</tr>
|
||||
<tr class="row-odd"><td><strong>char_set</strong></td>
|
||||
<td>The character set used in communicating with the database.</td>
|
||||
</tr>
|
||||
<tr class="row-even"><td><strong>dbcollat</strong></td>
|
||||
<td><p class="first">The character collation used in communicating with the database</p>
|
||||
<div class="last admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">Only used in the ‘mysql’ and ‘mysqli’ drivers.</p>
|
||||
</div>
|
||||
</td>
|
||||
</tr>
|
||||
<tr class="row-odd"><td><strong>swap_pre</strong></td>
|
||||
<td>A default table prefix that should be swapped with dbprefix. This is useful for distributed
|
||||
applications where you might run manually written queries, and need the prefix to still be
|
||||
customizable by the end user.</td>
|
||||
</tr>
|
||||
<tr class="row-even"><td><strong>schema</strong></td>
|
||||
<td>The database schema, defaults to ‘public’. Used by PostgreSQL and ODBC drivers.</td>
|
||||
</tr>
|
||||
<tr class="row-odd"><td><strong>encrypt</strong></td>
|
||||
<td><p class="first">Whether or not to use an encrypted connection.</p>
|
||||
<blockquote class="last">
|
||||
<div><ul class="simple">
|
||||
<li>‘mysql’ (deprecated), ‘sqlsrv’ and ‘pdo/sqlsrv’ drivers accept TRUE/FALSE</li>
|
||||
<li>‘mysqli’ and ‘pdo/mysql’ drivers accept an array with the following options:<ul>
|
||||
<li>‘ssl_key’ - Path to the private key file</li>
|
||||
<li>‘ssl_cert’ - Path to the public key certificate file</li>
|
||||
<li>‘ssl_ca’ - Path to the certificate authority file</li>
|
||||
<li>‘ssl_capath’ - Path to a directory containing trusted CA certificates in PEM format</li>
|
||||
<li>‘ssl_cipher’ - List of <em>allowed</em> ciphers to be used for the encryption, separated by colons (‘:’)</li>
|
||||
<li>‘ssl_verify’ - TRUE/FALSE; Whether to verify the server certificate or not (‘mysqli’ only)</li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
</div></blockquote>
|
||||
</td>
|
||||
</tr>
|
||||
<tr class="row-even"><td><strong>compress</strong></td>
|
||||
<td>Whether or not to use client compression (MySQL only).</td>
|
||||
</tr>
|
||||
<tr class="row-odd"><td><strong>stricton</strong></td>
|
||||
<td>TRUE/FALSE (boolean) - Whether to force “Strict Mode” connections, good for ensuring strict SQL
|
||||
while developing an application.</td>
|
||||
</tr>
|
||||
<tr class="row-even"><td><strong>port</strong></td>
|
||||
<td><p class="first">The database port number. To use this value you have to add a line to the database config array.</p>
|
||||
<div class="last highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$db</span><span class="p">[</span><span class="s1">'default'</span><span class="p">][</span><span class="s1">'port'</span><span class="p">]</span> <span class="o">=</span> <span class="mi">5432</span><span class="p">;</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">Depending on what database platform you are using (MySQL, PostgreSQL,
|
||||
etc.) not all values will be needed. For example, when using SQLite you
|
||||
will not need to supply a username or password, and the database name
|
||||
will be the path to your database file. The information above assumes
|
||||
you are using MySQL.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
|
||||
</div>
|
||||
<footer>
|
||||
|
||||
<div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
|
||||
|
||||
<a href="connecting.html" class="btn btn-neutral float-right" title="Connecting to your Database">Next <span class="fa fa-arrow-circle-right"></span></a>
|
||||
|
||||
|
||||
<a href="examples.html" class="btn btn-neutral" title="Database Quick Start: Example Code"><span class="fa fa-arrow-circle-left"></span> Previous</a>
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
<hr/>
|
||||
|
||||
<div role="contentinfo">
|
||||
<p>
|
||||
© Copyright 2014 - 2019, British Columbia Institute of Technology.
|
||||
Last updated on Sep 19, 2019.
|
||||
</p>
|
||||
</div>
|
||||
|
||||
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||||
|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
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|
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|
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|
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|
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|
||||
641
user_guide/database/connecting.html
Executable file
641
user_guide/database/connecting.html
Executable file
@ -0,0 +1,641 @@
|
||||
|
||||
|
||||
<!DOCTYPE html>
|
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||||
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|
||||
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|
||||
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
|
||||
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||||
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||||
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||||
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||||
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|
||||
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|
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|
||||
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||||
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|
||||
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||||
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||||
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|
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||||
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||||
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|
||||
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|
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
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||||
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul class="current">
|
||||
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Database Reference</a><ul class="current">
|
||||
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|
||||
<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
|
||||
<li class="toctree-l2 current"><a class="current reference internal" href="#">Connecting to a Database</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="queries.html">Running Queries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="transactions.html">Transactions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting MetaData</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="caching.html">Query Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
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||||
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|
||||
<ul>
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<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
|
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<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
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||||
<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul class="current">
|
||||
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Database Reference</a><ul class="current">
|
||||
<li class="toctree-l2"><a class="reference internal" href="examples.html">Quick Start: Usage Examples</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
|
||||
<li class="toctree-l2 current"><a class="current reference internal" href="#">Connecting to a Database</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="queries.html">Running Queries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="transactions.html">Transactions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting MetaData</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="caching.html">Query Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
|
||||
|
||||
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||||
</div>
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||||
</nav>
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<section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
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<nav class="wy-nav-top" role="navigation" aria-label="top navigation">
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<a href="../index.html">CodeIgniter</a>
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</nav>
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<div class="wy-nav-content">
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<div class="rst-content">
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<div role="navigation" aria-label="breadcrumbs navigation">
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<ul class="wy-breadcrumbs">
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<li><a href="../index.html">Docs</a> »</li>
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|
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<li><a href="index.html">Database Reference</a> »</li>
|
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<li>Connecting to your Database</li>
|
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<li class="wy-breadcrumbs-aside">
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<div style="float:right;margin-left:5px;" id="closeMe">
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<img title="Classic Layout" alt="classic layout" src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" />
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</ul>
|
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<hr/>
|
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</div>
|
||||
<div role="main" class="document">
|
||||
|
||||
<div class="section" id="connecting-to-your-database">
|
||||
<h1>Connecting to your Database<a class="headerlink" href="#connecting-to-your-database" title="Permalink to this headline">¶</a></h1>
|
||||
<p>There are two ways to connect to a database:</p>
|
||||
<div class="section" id="automatically-connecting">
|
||||
<h2>Automatically Connecting<a class="headerlink" href="#automatically-connecting" title="Permalink to this headline">¶</a></h2>
|
||||
<p>The “auto connect” feature will load and instantiate the database class
|
||||
with every page load. To enable “auto connecting”, add the word database
|
||||
to the library array, as indicated in the following file:</p>
|
||||
<p>application/config/autoload.php</p>
|
||||
</div>
|
||||
<div class="section" id="manually-connecting">
|
||||
<h2>Manually Connecting<a class="headerlink" href="#manually-connecting" title="Permalink to this headline">¶</a></h2>
|
||||
<p>If only some of your pages require database connectivity you can
|
||||
manually connect to your database by adding this line of code in any
|
||||
function where it is needed, or in your class constructor to make the
|
||||
database available globally in that class.</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">database</span><span class="p">();</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>If the above function does <strong>not</strong> contain any information in the first
|
||||
parameter it will connect to the group specified in your database config
|
||||
file. For most people, this is the preferred method of use.</p>
|
||||
<div class="section" id="available-parameters">
|
||||
<h3>Available Parameters<a class="headerlink" href="#available-parameters" title="Permalink to this headline">¶</a></h3>
|
||||
<ol class="arabic simple">
|
||||
<li>The database connection values, passed either as an array or a DSN
|
||||
string.</li>
|
||||
<li>TRUE/FALSE (boolean). Whether to return the connection ID (see
|
||||
Connecting to Multiple Databases below).</li>
|
||||
<li>TRUE/FALSE (boolean). Whether to enable the Query Builder class. Set
|
||||
to TRUE by default.</li>
|
||||
</ol>
|
||||
</div>
|
||||
<div class="section" id="manually-connecting-to-a-database">
|
||||
<h3>Manually Connecting to a Database<a class="headerlink" href="#manually-connecting-to-a-database" title="Permalink to this headline">¶</a></h3>
|
||||
<p>The first parameter of this function can <strong>optionally</strong> be used to
|
||||
specify a particular database group from your config file, or you can
|
||||
even submit connection values for a database that is not specified in
|
||||
your config file. Examples:</p>
|
||||
<p>To choose a specific group from your config file you can do this:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">database</span><span class="p">(</span><span class="s1">'group_name'</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>Where group_name is the name of the connection group from your config
|
||||
file.</p>
|
||||
<p>To connect manually to a desired database you can pass an array of
|
||||
values:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$config</span><span class="p">[</span><span class="s1">'hostname'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'localhost'</span><span class="p">;</span>
|
||||
<span class="nv">$config</span><span class="p">[</span><span class="s1">'username'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'myusername'</span><span class="p">;</span>
|
||||
<span class="nv">$config</span><span class="p">[</span><span class="s1">'password'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'mypassword'</span><span class="p">;</span>
|
||||
<span class="nv">$config</span><span class="p">[</span><span class="s1">'database'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'mydatabase'</span><span class="p">;</span>
|
||||
<span class="nv">$config</span><span class="p">[</span><span class="s1">'dbdriver'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'mysqli'</span><span class="p">;</span>
|
||||
<span class="nv">$config</span><span class="p">[</span><span class="s1">'dbprefix'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">''</span><span class="p">;</span>
|
||||
<span class="nv">$config</span><span class="p">[</span><span class="s1">'pconnect'</span><span class="p">]</span> <span class="o">=</span> <span class="k">FALSE</span><span class="p">;</span>
|
||||
<span class="nv">$config</span><span class="p">[</span><span class="s1">'db_debug'</span><span class="p">]</span> <span class="o">=</span> <span class="k">TRUE</span><span class="p">;</span>
|
||||
<span class="nv">$config</span><span class="p">[</span><span class="s1">'cache_on'</span><span class="p">]</span> <span class="o">=</span> <span class="k">FALSE</span><span class="p">;</span>
|
||||
<span class="nv">$config</span><span class="p">[</span><span class="s1">'cachedir'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">''</span><span class="p">;</span>
|
||||
<span class="nv">$config</span><span class="p">[</span><span class="s1">'char_set'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'utf8'</span><span class="p">;</span>
|
||||
<span class="nv">$config</span><span class="p">[</span><span class="s1">'dbcollat'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'utf8_general_ci'</span><span class="p">;</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">database</span><span class="p">(</span><span class="nv">$config</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>For information on each of these values please see the <a class="reference internal" href="configuration.html"><span class="doc">configuration
|
||||
page</span></a>.</p>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p>For the PDO driver, you should use the $config[‘dsn’] setting
|
||||
instead of ‘hostname’ and ‘database’:</p>
|
||||
<div class="last line-block">
|
||||
<div class="line"><br /></div>
|
||||
<div class="line">$config[‘dsn’] = ‘mysql:host=localhost;dbname=mydatabase’;</div>
|
||||
</div>
|
||||
</div>
|
||||
<p>Or you can submit your database values as a Data Source Name. DSNs must
|
||||
have this prototype:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$dsn</span> <span class="o">=</span> <span class="s1">'dbdriver://username:password@hostname/database'</span><span class="p">;</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">database</span><span class="p">(</span><span class="nv">$dsn</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>To override default config values when connecting with a DSN string, add
|
||||
the config variables as a query string.</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$dsn</span> <span class="o">=</span> <span class="s1">'dbdriver://username:password@hostname/database?char_set=utf8&dbcollat=utf8_general_ci&cache_on=true&cachedir=/path/to/cache'</span><span class="p">;</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">database</span><span class="p">(</span><span class="nv">$dsn</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="connecting-to-multiple-databases">
|
||||
<h2>Connecting to Multiple Databases<a class="headerlink" href="#connecting-to-multiple-databases" title="Permalink to this headline">¶</a></h2>
|
||||
<p>If you need to connect to more than one database simultaneously you can
|
||||
do so as follows:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$DB1</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">database</span><span class="p">(</span><span class="s1">'group_one'</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span>
|
||||
<span class="nv">$DB2</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">database</span><span class="p">(</span><span class="s1">'group_two'</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>Note: Change the words “group_one” and “group_two” to the specific
|
||||
group names you are connecting to (or you can pass the connection values
|
||||
as indicated above).</p>
|
||||
<p>By setting the second parameter to TRUE (boolean) the function will
|
||||
return the database object.</p>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p>When you connect this way, you will use your object name to issue
|
||||
commands rather than the syntax used throughout this guide. In other
|
||||
words, rather than issuing commands with:</p>
|
||||
<div class="last line-block">
|
||||
<div class="line"><br /></div>
|
||||
<div class="line">$this->db->query();</div>
|
||||
<div class="line">$this->db->result();</div>
|
||||
<div class="line">etc…</div>
|
||||
<div class="line"><br /></div>
|
||||
<div class="line">You will instead use:</div>
|
||||
<div class="line"><br /></div>
|
||||
<div class="line">$DB1->query();</div>
|
||||
<div class="line">$DB1->result();</div>
|
||||
<div class="line">etc…</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p>You don’t need to create separate database configurations if you
|
||||
only need to use a different database on the same connection. You
|
||||
can switch to a different database when you need to, like this:</p>
|
||||
<div class="last line-block">
|
||||
<div class="line">$this->db->db_select($database2_name);</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="reconnecting-keeping-the-connection-alive">
|
||||
<h2>Reconnecting / Keeping the Connection Alive<a class="headerlink" href="#reconnecting-keeping-the-connection-alive" title="Permalink to this headline">¶</a></h2>
|
||||
<p>If the database server’s idle timeout is exceeded while you’re doing
|
||||
some heavy PHP lifting (processing an image, for instance), you should
|
||||
consider pinging the server by using the reconnect() method before
|
||||
sending further queries, which can gracefully keep the connection alive
|
||||
or re-establish it.</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">reconnect</span><span class="p">();</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="manually-closing-the-connection">
|
||||
<h2>Manually closing the Connection<a class="headerlink" href="#manually-closing-the-connection" title="Permalink to this headline">¶</a></h2>
|
||||
<p>While CodeIgniter intelligently takes care of closing your database
|
||||
connections, you can explicitly close the connection.</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">close</span><span class="p">();</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
|
||||
</div>
|
||||
<footer>
|
||||
|
||||
<div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
|
||||
|
||||
<a href="queries.html" class="btn btn-neutral float-right" title="Queries">Next <span class="fa fa-arrow-circle-right"></span></a>
|
||||
|
||||
|
||||
<a href="configuration.html" class="btn btn-neutral" title="Database Configuration"><span class="fa fa-arrow-circle-left"></span> Previous</a>
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
<hr/>
|
||||
|
||||
<div role="contentinfo">
|
||||
<p>
|
||||
© Copyright 2014 - 2019, British Columbia Institute of Technology.
|
||||
Last updated on Sep 19, 2019.
|
||||
</p>
|
||||
</div>
|
||||
|
||||
Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>.
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||||
</footer>
|
||||
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|
||||
</div>
|
||||
|
||||
</section>
|
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|
||||
</div>
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
<script type="text/javascript">
|
||||
var DOCUMENTATION_OPTIONS = {
|
||||
URL_ROOT:'../',
|
||||
VERSION:'3.1.11',
|
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COLLAPSE_INDEX:false,
|
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FILE_SUFFIX:'.html',
|
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HAS_SOURCE: false
|
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|
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jQuery(function () {
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||||
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|
||||
</html>
|
||||
1483
user_guide/database/db_driver_reference.html
Executable file
1483
user_guide/database/db_driver_reference.html
Executable file
File diff suppressed because it is too large
Load Diff
597
user_guide/database/examples.html
Executable file
597
user_guide/database/examples.html
Executable file
@ -0,0 +1,597 @@
|
||||
|
||||
|
||||
<!DOCTYPE html>
|
||||
<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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||||
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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||||
<title>Database Quick Start: Example Code — CodeIgniter 3.1.11 documentation</title>
|
||||
|
||||
|
||||
|
||||
|
||||
<link rel="shortcut icon" href="../_static/ci-icon.ico"/>
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<link href='https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic|Roboto+Slab:400,700|Inconsolata:400,700&subset=latin,cyrillic' rel='stylesheet' type='text/css'>
|
||||
|
||||
|
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|
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|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
<link rel="stylesheet" href="../_static/css/citheme.css" type="text/css" />
|
||||
|
||||
|
||||
|
||||
<link rel="index" title="Index"
|
||||
href="../genindex.html"/>
|
||||
<link rel="search" title="Search" href="../search.html"/>
|
||||
<link rel="top" title="CodeIgniter 3.1.11 documentation" href="../index.html"/>
|
||||
<link rel="up" title="Database Reference" href="index.html"/>
|
||||
<link rel="next" title="Database Configuration" href="configuration.html"/>
|
||||
<link rel="prev" title="Database Reference" href="index.html"/>
|
||||
|
||||
|
||||
<script src="https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.min.js"></script>
|
||||
|
||||
</head>
|
||||
|
||||
<body class="wy-body-for-nav" role="document">
|
||||
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||||
<div id="nav">
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||||
<div id="nav_inner">
|
||||
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|
||||
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||||
<div id="pulldown-menu" class="ciNav">
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||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a></li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../installation/upgrading.html">Upgrading From a Previous Version</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../installation/troubleshooting.html">Troubleshooting</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../overview/index.html">CodeIgniter Overview</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/getting_started.html">Getting Started</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/at_a_glance.html">CodeIgniter at a Glance</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/features.html">Supported Features</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/appflow.html">Application Flow Chart</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/mvc.html">Model-View-Controller</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../tutorial/index.html">Tutorial</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/static_pages.html">Static pages</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/news_section.html">News section</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/create_news_items.html">Create news items</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul class="current">
|
||||
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Database Reference</a><ul class="current">
|
||||
<li class="toctree-l2 current"><a class="current reference internal" href="#">Quick Start: Usage Examples</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="queries.html">Running Queries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="transactions.html">Transactions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting MetaData</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="caching.html">Query Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
|
||||
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<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../overview/at_a_glance.html">CodeIgniter at a Glance</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/features.html">Supported Features</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/mvc.html">Model-View-Controller</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../tutorial/create_news_items.html">Create news items</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
|
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<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
|
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</li>
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||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
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||||
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||||
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||||
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||||
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||||
<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul class="current">
|
||||
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Database Reference</a><ul class="current">
|
||||
<li class="toctree-l2 current"><a class="current reference internal" href="#">Quick Start: Usage Examples</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="queries.html">Running Queries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="transactions.html">Transactions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting MetaData</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="caching.html">Query Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
|
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</ul>
|
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<li><a href="index.html">Database Reference</a> »</li>
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<li>Database Quick Start: Example Code</li>
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<div style="float:right;margin-left:5px;" id="closeMe">
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<div class="section" id="database-quick-start-example-code">
|
||||
<h1>Database Quick Start: Example Code<a class="headerlink" href="#database-quick-start-example-code" title="Permalink to this headline">¶</a></h1>
|
||||
<p>The following page contains example code showing how the database class
|
||||
is used. For complete details please read the individual pages
|
||||
describing each function.</p>
|
||||
<div class="section" id="initializing-the-database-class">
|
||||
<h2>Initializing the Database Class<a class="headerlink" href="#initializing-the-database-class" title="Permalink to this headline">¶</a></h2>
|
||||
<p>The following code loads and initializes the database class based on
|
||||
your <a class="reference internal" href="configuration.html"><span class="doc">configuration</span></a> settings:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">database</span><span class="p">();</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>Once loaded the class is ready to be used as described below.</p>
|
||||
<p>Note: If all your pages require database access you can connect
|
||||
automatically. See the <a class="reference internal" href="connecting.html"><span class="doc">connecting</span></a> page for details.</p>
|
||||
</div>
|
||||
<div class="section" id="standard-query-with-multiple-results-object-version">
|
||||
<h2>Standard Query With Multiple Results (Object Version)<a class="headerlink" href="#standard-query-with-multiple-results-object-version" title="Permalink to this headline">¶</a></h2>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'SELECT name, title, email FROM my_table'</span><span class="p">);</span>
|
||||
|
||||
<span class="k">foreach</span> <span class="p">(</span><span class="nv">$query</span><span class="o">-></span><span class="na">result</span><span class="p">()</span> <span class="k">as</span> <span class="nv">$row</span><span class="p">)</span>
|
||||
<span class="p">{</span>
|
||||
<span class="k">echo</span> <span class="nv">$row</span><span class="o">-></span><span class="na">title</span><span class="p">;</span>
|
||||
<span class="k">echo</span> <span class="nv">$row</span><span class="o">-></span><span class="na">name</span><span class="p">;</span>
|
||||
<span class="k">echo</span> <span class="nv">$row</span><span class="o">-></span><span class="na">email</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
|
||||
<span class="k">echo</span> <span class="s1">'Total Results: '</span> <span class="o">.</span> <span class="nv">$query</span><span class="o">-></span><span class="na">num_rows</span><span class="p">();</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>The above result() function returns an array of <strong>objects</strong>. Example:
|
||||
$row->title</p>
|
||||
</div>
|
||||
<div class="section" id="standard-query-with-multiple-results-array-version">
|
||||
<h2>Standard Query With Multiple Results (Array Version)<a class="headerlink" href="#standard-query-with-multiple-results-array-version" title="Permalink to this headline">¶</a></h2>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'SELECT name, title, email FROM my_table'</span><span class="p">);</span>
|
||||
|
||||
<span class="k">foreach</span> <span class="p">(</span><span class="nv">$query</span><span class="o">-></span><span class="na">result_array</span><span class="p">()</span> <span class="k">as</span> <span class="nv">$row</span><span class="p">)</span>
|
||||
<span class="p">{</span>
|
||||
<span class="k">echo</span> <span class="nv">$row</span><span class="p">[</span><span class="s1">'title'</span><span class="p">];</span>
|
||||
<span class="k">echo</span> <span class="nv">$row</span><span class="p">[</span><span class="s1">'name'</span><span class="p">];</span>
|
||||
<span class="k">echo</span> <span class="nv">$row</span><span class="p">[</span><span class="s1">'email'</span><span class="p">];</span>
|
||||
<span class="p">}</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>The above result_array() function returns an array of standard array
|
||||
indexes. Example: $row[‘title’]</p>
|
||||
</div>
|
||||
<div class="section" id="standard-query-with-single-result">
|
||||
<h2>Standard Query With Single Result<a class="headerlink" href="#standard-query-with-single-result" title="Permalink to this headline">¶</a></h2>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'SELECT name FROM my_table LIMIT 1'</span><span class="p">);</span>
|
||||
<span class="nv">$row</span> <span class="o">=</span> <span class="nv">$query</span><span class="o">-></span><span class="na">row</span><span class="p">();</span>
|
||||
<span class="k">echo</span> <span class="nv">$row</span><span class="o">-></span><span class="na">name</span><span class="p">;</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>The above row() function returns an <strong>object</strong>. Example: $row->name</p>
|
||||
</div>
|
||||
<div class="section" id="standard-query-with-single-result-array-version">
|
||||
<h2>Standard Query With Single Result (Array version)<a class="headerlink" href="#standard-query-with-single-result-array-version" title="Permalink to this headline">¶</a></h2>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'SELECT name FROM my_table LIMIT 1'</span><span class="p">);</span>
|
||||
<span class="nv">$row</span> <span class="o">=</span> <span class="nv">$query</span><span class="o">-></span><span class="na">row_array</span><span class="p">();</span>
|
||||
<span class="k">echo</span> <span class="nv">$row</span><span class="p">[</span><span class="s1">'name'</span><span class="p">];</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>The above row_array() function returns an <strong>array</strong>. Example:
|
||||
$row[‘name’]</p>
|
||||
</div>
|
||||
<div class="section" id="standard-insert">
|
||||
<h2>Standard Insert<a class="headerlink" href="#standard-insert" title="Permalink to this headline">¶</a></h2>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$sql</span> <span class="o">=</span> <span class="s2">"INSERT INTO mytable (title, name) VALUES ("</span><span class="o">.</span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">escape</span><span class="p">(</span><span class="nv">$title</span><span class="p">)</span><span class="o">.</span><span class="s2">", "</span><span class="o">.</span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">escape</span><span class="p">(</span><span class="nv">$name</span><span class="p">)</span><span class="o">.</span><span class="s2">")"</span><span class="p">;</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="nv">$sql</span><span class="p">);</span>
|
||||
<span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">affected_rows</span><span class="p">();</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="query-builder-query">
|
||||
<h2>Query Builder Query<a class="headerlink" href="#query-builder-query" title="Permalink to this headline">¶</a></h2>
|
||||
<p>The <a class="reference internal" href="query_builder.html"><span class="doc">Query Builder Pattern</span></a> gives you a simplified
|
||||
means of retrieving data:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">get</span><span class="p">(</span><span class="s1">'table_name'</span><span class="p">);</span>
|
||||
|
||||
<span class="k">foreach</span> <span class="p">(</span><span class="nv">$query</span><span class="o">-></span><span class="na">result</span><span class="p">()</span> <span class="k">as</span> <span class="nv">$row</span><span class="p">)</span>
|
||||
<span class="p">{</span>
|
||||
<span class="k">echo</span> <span class="nv">$row</span><span class="o">-></span><span class="na">title</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>The above get() function retrieves all the results from the supplied
|
||||
table. The <a class="reference internal" href="query_builder.html"><span class="doc">Query Builder</span></a> class contains a full
|
||||
compliment of functions for working with data.</p>
|
||||
</div>
|
||||
<div class="section" id="query-builder-insert">
|
||||
<h2>Query Builder Insert<a class="headerlink" href="#query-builder-insert" title="Permalink to this headline">¶</a></h2>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
|
||||
<span class="s1">'title'</span> <span class="o">=></span> <span class="nv">$title</span><span class="p">,</span>
|
||||
<span class="s1">'name'</span> <span class="o">=></span> <span class="nv">$name</span><span class="p">,</span>
|
||||
<span class="s1">'date'</span> <span class="o">=></span> <span class="nv">$date</span>
|
||||
<span class="p">);</span>
|
||||
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">insert</span><span class="p">(</span><span class="s1">'mytable'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span> <span class="c1">// Produces: INSERT INTO mytable (title, name, date) VALUES ('{$title}', '{$name}', '{$date}')</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
|
||||
</div>
|
||||
<footer>
|
||||
|
||||
<div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
|
||||
|
||||
<a href="configuration.html" class="btn btn-neutral float-right" title="Database Configuration">Next <span class="fa fa-arrow-circle-right"></span></a>
|
||||
|
||||
|
||||
<a href="index.html" class="btn btn-neutral" title="Database Reference"><span class="fa fa-arrow-circle-left"></span> Previous</a>
|
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|
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|
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|
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|
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|
||||
<p>
|
||||
© Copyright 2014 - 2019, British Columbia Institute of Technology.
|
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Last updated on Sep 19, 2019.
|
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|
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1034
user_guide/database/forge.html
Executable file
1034
user_guide/database/forge.html
Executable file
File diff suppressed because it is too large
Load Diff
592
user_guide/database/helpers.html
Executable file
592
user_guide/database/helpers.html
Executable file
@ -0,0 +1,592 @@
|
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<li class="toctree-l2"><a class="reference internal" href="../tutorial/create_news_items.html">Create news items</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li>
|
||||
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|
||||
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|
||||
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
|
||||
</ul>
|
||||
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|
||||
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|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul class="current">
|
||||
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Database Reference</a><ul class="current">
|
||||
<li class="toctree-l2"><a class="reference internal" href="examples.html">Quick Start: Usage Examples</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="queries.html">Running Queries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
|
||||
<li class="toctree-l2 current"><a class="current reference internal" href="#">Query Helper Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="transactions.html">Transactions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting MetaData</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="caching.html">Query Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
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<nav data-toggle="wy-nav-shift" class="wy-nav-side">
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<a href="../index.html" class="fa fa-home"> CodeIgniter</a>
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<input type="hidden" name="area" value="default" />
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<ul>
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||||
<li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a></li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/upgrading.html">Upgrading From a Previous Version</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/troubleshooting.html">Troubleshooting</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../overview/index.html">CodeIgniter Overview</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../overview/getting_started.html">Getting Started</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/at_a_glance.html">CodeIgniter at a Glance</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/features.html">Supported Features</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../overview/appflow.html">Application Flow Chart</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/mvc.html">Model-View-Controller</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/create_news_items.html">Create news items</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
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||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
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<div class="section" id="query-helper-methods">
|
||||
<h1>Query Helper Methods<a class="headerlink" href="#query-helper-methods" title="Permalink to this headline">¶</a></h1>
|
||||
<div class="section" id="information-from-executing-a-query">
|
||||
<h2>Information From Executing a Query<a class="headerlink" href="#information-from-executing-a-query" title="Permalink to this headline">¶</a></h2>
|
||||
<p><strong>$this->db->insert_id()</strong></p>
|
||||
<p>The insert ID number when performing database inserts.</p>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">If using the PDO driver with PostgreSQL, or using the Interbase
|
||||
driver, this function requires a $name parameter, which specifies the
|
||||
appropriate sequence to check for the insert id.</p>
|
||||
</div>
|
||||
<p><strong>$this->db->affected_rows()</strong></p>
|
||||
<p>Displays the number of affected rows, when doing “write” type queries
|
||||
(insert, update, etc.).</p>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">In MySQL “DELETE FROM TABLE” returns 0 affected rows. The database
|
||||
class has a small hack that allows it to return the correct number of
|
||||
affected rows. By default this hack is enabled but it can be turned off
|
||||
in the database driver file.</p>
|
||||
</div>
|
||||
<p><strong>$this->db->last_query()</strong></p>
|
||||
<p>Returns the last query that was run (the query string, not the result).
|
||||
Example:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$str</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">last_query</span><span class="p">();</span>
|
||||
|
||||
<span class="c1">// Produces: SELECT * FROM sometable....</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">Disabling the <strong>save_queries</strong> setting in your database
|
||||
configuration will render this function useless.</p>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="information-about-your-database">
|
||||
<h2>Information About Your Database<a class="headerlink" href="#information-about-your-database" title="Permalink to this headline">¶</a></h2>
|
||||
<p><strong>$this->db->count_all()</strong></p>
|
||||
<p>Permits you to determine the number of rows in a particular table.
|
||||
Submit the table name in the first parameter. Example:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">count_all</span><span class="p">(</span><span class="s1">'my_table'</span><span class="p">);</span>
|
||||
|
||||
<span class="c1">// Produces an integer, like 25</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p><strong>$this->db->platform()</strong></p>
|
||||
<p>Outputs the database platform you are running (MySQL, MS SQL, Postgres,
|
||||
etc…):</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">platform</span><span class="p">();</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p><strong>$this->db->version()</strong></p>
|
||||
<p>Outputs the database version you are running:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">version</span><span class="p">();</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="making-your-queries-easier">
|
||||
<h2>Making Your Queries Easier<a class="headerlink" href="#making-your-queries-easier" title="Permalink to this headline">¶</a></h2>
|
||||
<p><strong>$this->db->insert_string()</strong></p>
|
||||
<p>This function simplifies the process of writing database inserts. It
|
||||
returns a correctly formatted SQL insert string. Example:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span><span class="s1">'name'</span> <span class="o">=></span> <span class="nv">$name</span><span class="p">,</span> <span class="s1">'email'</span> <span class="o">=></span> <span class="nv">$email</span><span class="p">,</span> <span class="s1">'url'</span> <span class="o">=></span> <span class="nv">$url</span><span class="p">);</span>
|
||||
|
||||
<span class="nv">$str</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">insert_string</span><span class="p">(</span><span class="s1">'table_name'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>The first parameter is the table name, the second is an associative
|
||||
array with the data to be inserted. The above example produces:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">INSERT</span> <span class="nx">INTO</span> <span class="nx">table_name</span> <span class="p">(</span><span class="nx">name</span><span class="p">,</span> <span class="nx">email</span><span class="p">,</span> <span class="nx">url</span><span class="p">)</span> <span class="nx">VALUES</span> <span class="p">(</span><span class="s1">'Rick'</span><span class="p">,</span> <span class="s1">'rick@example.com'</span><span class="p">,</span> <span class="s1">'example.com'</span><span class="p">)</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">Values are automatically escaped, producing safer queries.</p>
|
||||
</div>
|
||||
<p><strong>$this->db->update_string()</strong></p>
|
||||
<p>This function simplifies the process of writing database updates. It
|
||||
returns a correctly formatted SQL update string. Example:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$data</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span><span class="s1">'name'</span> <span class="o">=></span> <span class="nv">$name</span><span class="p">,</span> <span class="s1">'email'</span> <span class="o">=></span> <span class="nv">$email</span><span class="p">,</span> <span class="s1">'url'</span> <span class="o">=></span> <span class="nv">$url</span><span class="p">);</span>
|
||||
|
||||
<span class="nv">$where</span> <span class="o">=</span> <span class="s2">"author_id = 1 AND status = 'active'"</span><span class="p">;</span>
|
||||
|
||||
<span class="nv">$str</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">update_string</span><span class="p">(</span><span class="s1">'table_name'</span><span class="p">,</span> <span class="nv">$data</span><span class="p">,</span> <span class="nv">$where</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>The first parameter is the table name, the second is an associative
|
||||
array with the data to be updated, and the third parameter is the
|
||||
“where” clause. The above example produces:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">UPDATE</span> <span class="nx">table_name</span> <span class="nx">SET</span> <span class="nx">name</span> <span class="o">=</span> <span class="s1">'Rick'</span><span class="p">,</span> <span class="nx">email</span> <span class="o">=</span> <span class="s1">'rick@example.com'</span><span class="p">,</span> <span class="nx">url</span> <span class="o">=</span> <span class="s1">'example.com'</span> <span class="nx">WHERE</span> <span class="nx">author_id</span> <span class="o">=</span> <span class="mi">1</span> <span class="k">AND</span> <span class="nx">status</span> <span class="o">=</span> <span class="s1">'active'</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">Values are automatically escaped, producing safer queries.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
|
||||
</div>
|
||||
<footer>
|
||||
|
||||
<div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
|
||||
|
||||
<a href="query_builder.html" class="btn btn-neutral float-right" title="Query Builder Class">Next <span class="fa fa-arrow-circle-right"></span></a>
|
||||
|
||||
|
||||
<a href="results.html" class="btn btn-neutral" title="Generating Query Results"><span class="fa fa-arrow-circle-left"></span> Previous</a>
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
<hr/>
|
||||
|
||||
<div role="contentinfo">
|
||||
<p>
|
||||
© Copyright 2014 - 2019, British Columbia Institute of Technology.
|
||||
Last updated on Sep 19, 2019.
|
||||
</p>
|
||||
</div>
|
||||
|
||||
Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>.
|
||||
|
||||
</footer>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
</section>
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
<script type="text/javascript">
|
||||
var DOCUMENTATION_OPTIONS = {
|
||||
URL_ROOT:'../',
|
||||
VERSION:'3.1.11',
|
||||
COLLAPSE_INDEX:false,
|
||||
FILE_SUFFIX:'.html',
|
||||
HAS_SOURCE: false
|
||||
};
|
||||
</script>
|
||||
<script type="text/javascript" src="../_static/jquery.js"></script>
|
||||
<script type="text/javascript" src="../_static/underscore.js"></script>
|
||||
<script type="text/javascript" src="../_static/doctools.js"></script>
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
<script type="text/javascript" src="../_static/js/theme.js"></script>
|
||||
|
||||
|
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|
||||
|
||||
<script type="text/javascript">
|
||||
jQuery(function () {
|
||||
SphinxRtdTheme.StickyNav.enable();
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});
|
||||
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|
||||
|
||||
|
||||
</body>
|
||||
</html>
|
||||
514
user_guide/database/index.html
Executable file
514
user_guide/database/index.html
Executable file
@ -0,0 +1,514 @@
|
||||
|
||||
|
||||
<!DOCTYPE html>
|
||||
<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
|
||||
<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
|
||||
<head>
|
||||
<meta charset="utf-8">
|
||||
<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
||||
|
||||
<title>Database Reference — CodeIgniter 3.1.11 documentation</title>
|
||||
|
||||
|
||||
|
||||
|
||||
<link rel="shortcut icon" href="../_static/ci-icon.ico"/>
|
||||
|
||||
|
||||
|
||||
<link href='https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic|Roboto+Slab:400,700|Inconsolata:400,700&subset=latin,cyrillic' rel='stylesheet' type='text/css'>
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
<link rel="stylesheet" href="../_static/css/citheme.css" type="text/css" />
|
||||
|
||||
|
||||
|
||||
<link rel="index" title="Index"
|
||||
href="../genindex.html"/>
|
||||
<link rel="search" title="Search" href="../search.html"/>
|
||||
<link rel="top" title="CodeIgniter 3.1.11 documentation" href="../index.html"/>
|
||||
<link rel="next" title="Database Quick Start: Example Code" href="examples.html"/>
|
||||
<link rel="prev" title="Zip Encoding Class" href="../libraries/zip.html"/>
|
||||
|
||||
|
||||
<script src="https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.min.js"></script>
|
||||
|
||||
</head>
|
||||
|
||||
<body class="wy-body-for-nav" role="document">
|
||||
|
||||
<div id="nav">
|
||||
<div id="nav_inner">
|
||||
|
||||
|
||||
|
||||
<div id="pulldown-menu" class="ciNav">
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a></li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../installation/upgrading.html">Upgrading From a Previous Version</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../installation/troubleshooting.html">Troubleshooting</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../overview/index.html">CodeIgniter Overview</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/getting_started.html">Getting Started</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/at_a_glance.html">CodeIgniter at a Glance</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/features.html">Supported Features</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/appflow.html">Application Flow Chart</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/mvc.html">Model-View-Controller</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../tutorial/index.html">Tutorial</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/static_pages.html">Static pages</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/news_section.html">News section</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/create_news_items.html">Create news items</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul class="current">
|
||||
<li class="toctree-l1 current"><a class="current reference internal" href="#">Database Reference</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="examples.html">Quick Start: Usage Examples</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="queries.html">Running Queries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="transactions.html">Transactions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting MetaData</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="caching.html">Query Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
</div>
|
||||
</div>
|
||||
<div id="nav2">
|
||||
<a href="#" id="openToc">
|
||||
<img src="data:image/jpeg;base64,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" title="Toggle Table of Contents" alt="Toggle Table of Contents" />
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<a href="../index.html" class="fa fa-home"> CodeIgniter</a>
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<li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/upgrading.html">Upgrading From a Previous Version</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/troubleshooting.html">Troubleshooting</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../overview/index.html">CodeIgniter Overview</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../overview/getting_started.html">Getting Started</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/at_a_glance.html">CodeIgniter at a Glance</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/features.html">Supported Features</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/appflow.html">Application Flow Chart</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/mvc.html">Model-View-Controller</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../tutorial/create_news_items.html">Create news items</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
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</ul>
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<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
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</ul>
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</li>
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</ul>
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
|
||||
</ul>
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||||
</li>
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||||
</ul>
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||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul class="current">
|
||||
<li class="toctree-l1 current"><a class="current reference internal" href="#">Database Reference</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="examples.html">Quick Start: Usage Examples</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="queries.html">Running Queries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="transactions.html">Transactions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting MetaData</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="caching.html">Query Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
|
||||
</ul>
|
||||
</li>
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</ul>
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||||
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</nav>
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<div style="float:right;margin-left:5px;" id="closeMe">
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||||
<img title="Classic Layout" alt="classic layout" src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" />
|
||||
</div>
|
||||
</ul>
|
||||
<hr/>
|
||||
</div>
|
||||
<div role="main" class="document">
|
||||
|
||||
<div class="section" id="database-reference">
|
||||
<h1>Database Reference<a class="headerlink" href="#database-reference" title="Permalink to this headline">¶</a></h1>
|
||||
<p>CodeIgniter comes with a full-featured and very fast abstracted database
|
||||
class that supports both traditional structures and Query Builder
|
||||
patterns. The database functions offer clear, simple syntax.</p>
|
||||
<div class="toctree-wrapper compound">
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="examples.html">Quick Start: Usage Examples</a></li>
|
||||
<li class="toctree-l1"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
|
||||
<li class="toctree-l1"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
|
||||
<li class="toctree-l1"><a class="reference internal" href="queries.html">Running Queries</a></li>
|
||||
<li class="toctree-l1"><a class="reference internal" href="results.html">Generating Query Results</a></li>
|
||||
<li class="toctree-l1"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
|
||||
<li class="toctree-l1"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l1"><a class="reference internal" href="transactions.html">Transactions</a></li>
|
||||
<li class="toctree-l1"><a class="reference internal" href="metadata.html">Getting MetaData</a></li>
|
||||
<li class="toctree-l1"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
|
||||
<li class="toctree-l1"><a class="reference internal" href="caching.html">Query Caching</a></li>
|
||||
<li class="toctree-l1"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l1"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
|
||||
<li class="toctree-l1"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
|
||||
</div>
|
||||
<footer>
|
||||
|
||||
<div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
|
||||
|
||||
<a href="examples.html" class="btn btn-neutral float-right" title="Database Quick Start: Example Code">Next <span class="fa fa-arrow-circle-right"></span></a>
|
||||
|
||||
|
||||
<a href="../libraries/zip.html" class="btn btn-neutral" title="Zip Encoding Class"><span class="fa fa-arrow-circle-left"></span> Previous</a>
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
<hr/>
|
||||
|
||||
<div role="contentinfo">
|
||||
<p>
|
||||
© Copyright 2014 - 2019, British Columbia Institute of Technology.
|
||||
Last updated on Sep 19, 2019.
|
||||
</p>
|
||||
</div>
|
||||
|
||||
Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>.
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||||
</footer>
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||||
</div>
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||||
</div>
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||||
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||||
</section>
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||||
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||||
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|
||||
|
||||
|
||||
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||||
|
||||
|
||||
<script type="text/javascript">
|
||||
var DOCUMENTATION_OPTIONS = {
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URL_ROOT:'../',
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</body>
|
||||
</html>
|
||||
614
user_guide/database/metadata.html
Executable file
614
user_guide/database/metadata.html
Executable file
@ -0,0 +1,614 @@
|
||||
|
||||
|
||||
<!DOCTYPE html>
|
||||
<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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||||
<title>Database Metadata — CodeIgniter 3.1.11 documentation</title>
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|
||||
|
||||
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||||
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||||
<link rel="shortcut icon" href="../_static/ci-icon.ico"/>
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<link href='https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic|Roboto+Slab:400,700|Inconsolata:400,700&subset=latin,cyrillic' rel='stylesheet' type='text/css'>
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||||
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||||
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||||
<link rel="stylesheet" href="../_static/css/citheme.css" type="text/css" />
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||||
<link rel="index" title="Index"
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||||
href="../genindex.html"/>
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<link rel="search" title="Search" href="../search.html"/>
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<link rel="top" title="CodeIgniter 3.1.11 documentation" href="../index.html"/>
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<link rel="up" title="Database Reference" href="index.html"/>
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<link rel="next" title="Custom Function Calls" href="call_function.html"/>
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<link rel="prev" title="Transactions" href="transactions.html"/>
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<div id="pulldown-menu" class="ciNav">
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<li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a></li>
|
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</ul>
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<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../installation/upgrading.html">Upgrading From a Previous Version</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../installation/troubleshooting.html">Troubleshooting</a></li>
|
||||
</ul>
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||||
</li>
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||||
</ul>
|
||||
<ul>
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||||
<li class="toctree-l1"><a class="reference internal" href="../overview/index.html">CodeIgniter Overview</a><ul>
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||||
<li class="toctree-l2"><a class="reference internal" href="../overview/getting_started.html">Getting Started</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/at_a_glance.html">CodeIgniter at a Glance</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/features.html">Supported Features</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/appflow.html">Application Flow Chart</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/mvc.html">Model-View-Controller</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../tutorial/index.html">Tutorial</a><ul>
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||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/static_pages.html">Static pages</a></li>
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||||
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
|
||||
</ul>
|
||||
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|
||||
</ul>
|
||||
<ul>
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||||
<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul class="current">
|
||||
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Database Reference</a><ul class="current">
|
||||
<li class="toctree-l2"><a class="reference internal" href="examples.html">Quick Start: Usage Examples</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="queries.html">Running Queries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="transactions.html">Transactions</a></li>
|
||||
<li class="toctree-l2 current"><a class="current reference internal" href="#">Getting MetaData</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="caching.html">Query Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
|
||||
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
|
||||
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<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
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||||
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||||
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||||
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||||
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||||
<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul class="current">
|
||||
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Database Reference</a><ul class="current">
|
||||
<li class="toctree-l2"><a class="reference internal" href="examples.html">Quick Start: Usage Examples</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="queries.html">Running Queries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="transactions.html">Transactions</a></li>
|
||||
<li class="toctree-l2 current"><a class="current reference internal" href="#">Getting MetaData</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="caching.html">Query Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
|
||||
</ul>
|
||||
</li>
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<li><a href="../index.html">Docs</a> »</li>
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<div role="main" class="document">
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<div class="section" id="database-metadata">
|
||||
<h1>Database Metadata<a class="headerlink" href="#database-metadata" title="Permalink to this headline">¶</a></h1>
|
||||
<div class="section" id="table-metadata">
|
||||
<h2>Table MetaData<a class="headerlink" href="#table-metadata" title="Permalink to this headline">¶</a></h2>
|
||||
<p>These functions let you fetch table information.</p>
|
||||
<div class="section" id="list-the-tables-in-your-database">
|
||||
<h3>List the Tables in Your Database<a class="headerlink" href="#list-the-tables-in-your-database" title="Permalink to this headline">¶</a></h3>
|
||||
<p><strong>$this->db->list_tables();</strong></p>
|
||||
<p>Returns an array containing the names of all the tables in the database
|
||||
you are currently connected to. Example:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$tables</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">list_tables</span><span class="p">();</span>
|
||||
|
||||
<span class="k">foreach</span> <span class="p">(</span><span class="nv">$tables</span> <span class="k">as</span> <span class="nv">$table</span><span class="p">)</span>
|
||||
<span class="p">{</span>
|
||||
<span class="k">echo</span> <span class="nv">$table</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="determine-if-a-table-exists">
|
||||
<h3>Determine If a Table Exists<a class="headerlink" href="#determine-if-a-table-exists" title="Permalink to this headline">¶</a></h3>
|
||||
<p><strong>$this->db->table_exists();</strong></p>
|
||||
<p>Sometimes it’s helpful to know whether a particular table exists before
|
||||
running an operation on it. Returns a boolean TRUE/FALSE. Usage example:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">if</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">table_exists</span><span class="p">(</span><span class="s1">'table_name'</span><span class="p">))</span>
|
||||
<span class="p">{</span>
|
||||
<span class="c1">// some code...</span>
|
||||
<span class="p">}</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">Replace <em>table_name</em> with the name of the table you are looking for.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="field-metadata">
|
||||
<h2>Field MetaData<a class="headerlink" href="#field-metadata" title="Permalink to this headline">¶</a></h2>
|
||||
<div class="section" id="list-the-fields-in-a-table">
|
||||
<h3>List the Fields in a Table<a class="headerlink" href="#list-the-fields-in-a-table" title="Permalink to this headline">¶</a></h3>
|
||||
<p><strong>$this->db->list_fields()</strong></p>
|
||||
<p>Returns an array containing the field names. This query can be called
|
||||
two ways:</p>
|
||||
<p>1. You can supply the table name and call it from the $this->db->
|
||||
object:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$fields</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">list_fields</span><span class="p">(</span><span class="s1">'table_name'</span><span class="p">);</span>
|
||||
|
||||
<span class="k">foreach</span> <span class="p">(</span><span class="nv">$fields</span> <span class="k">as</span> <span class="nv">$field</span><span class="p">)</span>
|
||||
<span class="p">{</span>
|
||||
<span class="k">echo</span> <span class="nv">$field</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>2. You can gather the field names associated with any query you run by
|
||||
calling the function from your query result object:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'SELECT * FROM some_table'</span><span class="p">);</span>
|
||||
|
||||
<span class="k">foreach</span> <span class="p">(</span><span class="nv">$query</span><span class="o">-></span><span class="na">list_fields</span><span class="p">()</span> <span class="k">as</span> <span class="nv">$field</span><span class="p">)</span>
|
||||
<span class="p">{</span>
|
||||
<span class="k">echo</span> <span class="nv">$field</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="determine-if-a-field-is-present-in-a-table">
|
||||
<h3>Determine If a Field is Present in a Table<a class="headerlink" href="#determine-if-a-field-is-present-in-a-table" title="Permalink to this headline">¶</a></h3>
|
||||
<p><strong>$this->db->field_exists()</strong></p>
|
||||
<p>Sometimes it’s helpful to know whether a particular field exists before
|
||||
performing an action. Returns a boolean TRUE/FALSE. Usage example:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">if</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">field_exists</span><span class="p">(</span><span class="s1">'field_name'</span><span class="p">,</span> <span class="s1">'table_name'</span><span class="p">))</span>
|
||||
<span class="p">{</span>
|
||||
<span class="c1">// some code...</span>
|
||||
<span class="p">}</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">Replace <em>field_name</em> with the name of the column you are looking
|
||||
for, and replace <em>table_name</em> with the name of the table you are
|
||||
looking for.</p>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="retrieve-field-metadata">
|
||||
<h3>Retrieve Field Metadata<a class="headerlink" href="#retrieve-field-metadata" title="Permalink to this headline">¶</a></h3>
|
||||
<p><strong>$this->db->field_data()</strong></p>
|
||||
<p>Returns an array of objects containing field information.</p>
|
||||
<p>Sometimes it’s helpful to gather the field names or other metadata, like
|
||||
the column type, max length, etc.</p>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">Not all databases provide meta-data.</p>
|
||||
</div>
|
||||
<p>Usage example:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$fields</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">field_data</span><span class="p">(</span><span class="s1">'table_name'</span><span class="p">);</span>
|
||||
|
||||
<span class="k">foreach</span> <span class="p">(</span><span class="nv">$fields</span> <span class="k">as</span> <span class="nv">$field</span><span class="p">)</span>
|
||||
<span class="p">{</span>
|
||||
<span class="k">echo</span> <span class="nv">$field</span><span class="o">-></span><span class="na">name</span><span class="p">;</span>
|
||||
<span class="k">echo</span> <span class="nv">$field</span><span class="o">-></span><span class="na">type</span><span class="p">;</span>
|
||||
<span class="k">echo</span> <span class="nv">$field</span><span class="o">-></span><span class="na">max_length</span><span class="p">;</span>
|
||||
<span class="k">echo</span> <span class="nv">$field</span><span class="o">-></span><span class="na">primary_key</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>If you have run a query already you can use the result object instead of
|
||||
supplying the table name:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s2">"YOUR QUERY"</span><span class="p">);</span>
|
||||
<span class="nv">$fields</span> <span class="o">=</span> <span class="nv">$query</span><span class="o">-></span><span class="na">field_data</span><span class="p">();</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>The following data is available from this function if supported by your
|
||||
database:</p>
|
||||
<ul class="simple">
|
||||
<li>name - column name</li>
|
||||
<li>max_length - maximum length of the column</li>
|
||||
<li>primary_key - 1 if the column is a primary key</li>
|
||||
<li>type - the type of the column</li>
|
||||
</ul>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
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|
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|
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|
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<div role="contentinfo">
|
||||
<p>
|
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© Copyright 2014 - 2019, British Columbia Institute of Technology.
|
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Last updated on Sep 19, 2019.
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658
user_guide/database/queries.html
Executable file
658
user_guide/database/queries.html
Executable file
@ -0,0 +1,658 @@
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||||
|
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|
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<!DOCTYPE html>
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
|
||||
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
|
||||
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul class="current">
|
||||
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Database Reference</a><ul class="current">
|
||||
<li class="toctree-l2"><a class="reference internal" href="examples.html">Quick Start: Usage Examples</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
|
||||
<li class="toctree-l2 current"><a class="current reference internal" href="#">Running Queries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="transactions.html">Transactions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting MetaData</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="caching.html">Query Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
|
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|
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
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<a href="../index.html" class="fa fa-home"> CodeIgniter</a>
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<li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a></li>
|
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<ul>
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||||
<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
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||||
<li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li>
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|
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<li class="toctree-l2"><a class="reference internal" href="../overview/at_a_glance.html">CodeIgniter at a Glance</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/features.html">Supported Features</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
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||||
<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
|
||||
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</li>
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||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li>
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||||
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||||
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul class="current">
|
||||
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Database Reference</a><ul class="current">
|
||||
<li class="toctree-l2"><a class="reference internal" href="examples.html">Quick Start: Usage Examples</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
|
||||
<li class="toctree-l2 current"><a class="current reference internal" href="#">Running Queries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="transactions.html">Transactions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting MetaData</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="caching.html">Query Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
|
||||
|
||||
|
||||
</div>
|
||||
|
||||
</nav>
|
||||
|
||||
<section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
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||||
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||||
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<nav class="wy-nav-top" role="navigation" aria-label="top navigation">
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<i data-toggle="wy-nav-top" class="fa fa-bars"></i>
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<a href="../index.html">CodeIgniter</a>
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</nav>
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<div class="wy-nav-content">
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<div class="rst-content">
|
||||
<div role="navigation" aria-label="breadcrumbs navigation">
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||||
<ul class="wy-breadcrumbs">
|
||||
<li><a href="../index.html">Docs</a> »</li>
|
||||
|
||||
<li><a href="index.html">Database Reference</a> »</li>
|
||||
|
||||
<li>Queries</li>
|
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<li class="wy-breadcrumbs-aside">
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||||
|
||||
</li>
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<div style="float:right;margin-left:5px;" id="closeMe">
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<img title="Classic Layout" alt="classic layout" src="data:image/gif;base64,R0lGODlhFAAUAJEAAAAAADMzM////wAAACH5BAUUAAIALAAAAAAUABQAAAImlI+py+0PU5gRBRDM3DxbWoXis42X13USOLauUIqnlsaH/eY6UwAAOw==" />
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</div>
|
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</ul>
|
||||
<hr/>
|
||||
</div>
|
||||
<div role="main" class="document">
|
||||
|
||||
<div class="section" id="queries">
|
||||
<h1>Queries<a class="headerlink" href="#queries" title="Permalink to this headline">¶</a></h1>
|
||||
<div class="section" id="query-basics">
|
||||
<h2>Query Basics<a class="headerlink" href="#query-basics" title="Permalink to this headline">¶</a></h2>
|
||||
<div class="section" id="regular-queries">
|
||||
<h3>Regular Queries<a class="headerlink" href="#regular-queries" title="Permalink to this headline">¶</a></h3>
|
||||
<p>To submit a query, use the <strong>query</strong> function:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'YOUR QUERY HERE'</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>The query() function returns a database result <strong>object</strong> when “read”
|
||||
type queries are run, which you can use to <a class="reference internal" href="results.html"><span class="doc">show your
|
||||
results</span></a>. When “write” type queries are run it simply
|
||||
returns TRUE or FALSE depending on success or failure. When retrieving
|
||||
data you will typically assign the query to your own variable, like
|
||||
this:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'YOUR QUERY HERE'</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="simplified-queries">
|
||||
<h3>Simplified Queries<a class="headerlink" href="#simplified-queries" title="Permalink to this headline">¶</a></h3>
|
||||
<p>The <strong>simple_query</strong> method is a simplified version of the
|
||||
$this->db->query() method. It DOES
|
||||
NOT return a database result set, nor does it set the query timer, or
|
||||
compile bind data, or store your query for debugging. It simply lets you
|
||||
submit a query. Most users will rarely use this function.</p>
|
||||
<p>It returns whatever the database drivers’ “execute” function returns.
|
||||
That typically is TRUE/FALSE on success or failure for write type queries
|
||||
such as INSERT, DELETE or UPDATE statements (which is what it really
|
||||
should be used for) and a resource/object on success for queries with
|
||||
fetchable results.</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">if</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">simple_query</span><span class="p">(</span><span class="s1">'YOUR QUERY'</span><span class="p">))</span>
|
||||
<span class="p">{</span>
|
||||
<span class="k">echo</span> <span class="s2">"Success!"</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">else</span>
|
||||
<span class="p">{</span>
|
||||
<span class="k">echo</span> <span class="s2">"Query failed!"</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">PostgreSQL’s <code class="docutils literal"><span class="pre">pg_exec()</span></code> function (for example) always
|
||||
returns a resource on success, even for write type queries.
|
||||
So take that in mind if you’re looking for a boolean value.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="working-with-database-prefixes-manually">
|
||||
<h2>Working with Database prefixes manually<a class="headerlink" href="#working-with-database-prefixes-manually" title="Permalink to this headline">¶</a></h2>
|
||||
<p>If you have configured a database prefix and would like to prepend it to
|
||||
a table name for use in a native SQL query for example, then you can use
|
||||
the following:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">dbprefix</span><span class="p">(</span><span class="s1">'tablename'</span><span class="p">);</span> <span class="c1">// outputs prefix_tablename</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>If for any reason you would like to change the prefix programatically
|
||||
without needing to create a new connection, you can use this method:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">set_dbprefix</span><span class="p">(</span><span class="s1">'newprefix_'</span><span class="p">);</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">dbprefix</span><span class="p">(</span><span class="s1">'tablename'</span><span class="p">);</span> <span class="c1">// outputs newprefix_tablename</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="protecting-identifiers">
|
||||
<h2>Protecting identifiers<a class="headerlink" href="#protecting-identifiers" title="Permalink to this headline">¶</a></h2>
|
||||
<p>In many databases it is advisable to protect table and field names - for
|
||||
example with backticks in MySQL. <strong>Query Builder queries are
|
||||
automatically protected</strong>, however if you need to manually protect an
|
||||
identifier you can use:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">protect_identifiers</span><span class="p">(</span><span class="s1">'table_name'</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="admonition important">
|
||||
<p class="first admonition-title">Important</p>
|
||||
<p class="last">Although the Query Builder will try its best to properly
|
||||
quote any field and table names that you feed it, note that it
|
||||
is NOT designed to work with arbitrary user input. DO NOT feed it
|
||||
with unsanitized user data.</p>
|
||||
</div>
|
||||
<p>This function will also add a table prefix to your table, assuming you
|
||||
have a prefix specified in your database config file. To enable the
|
||||
prefixing set TRUE (boolean) via the second parameter:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">protect_identifiers</span><span class="p">(</span><span class="s1">'table_name'</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="escaping-queries">
|
||||
<h2>Escaping Queries<a class="headerlink" href="#escaping-queries" title="Permalink to this headline">¶</a></h2>
|
||||
<p>It’s a very good security practice to escape your data before submitting
|
||||
it into your database. CodeIgniter has three methods that help you do
|
||||
this:</p>
|
||||
<ol class="arabic">
|
||||
<li><p class="first"><strong>$this->db->escape()</strong> This function determines the data type so
|
||||
that it can escape only string data. It also automatically adds
|
||||
single quotes around the data so you don’t have to:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$sql</span> <span class="o">=</span> <span class="s2">"INSERT INTO table (title) VALUES("</span><span class="o">.</span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">escape</span><span class="p">(</span><span class="nv">$title</span><span class="p">)</span><span class="o">.</span><span class="s2">")"</span><span class="p">;</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</li>
|
||||
<li><p class="first"><strong>$this->db->escape_str()</strong> This function escapes the data passed to
|
||||
it, regardless of type. Most of the time you’ll use the above
|
||||
function rather than this one. Use the function like this:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$sql</span> <span class="o">=</span> <span class="s2">"INSERT INTO table (title) VALUES('"</span><span class="o">.</span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">escape_str</span><span class="p">(</span><span class="nv">$title</span><span class="p">)</span><span class="o">.</span><span class="s2">"')"</span><span class="p">;</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</li>
|
||||
<li><p class="first"><strong>$this->db->escape_like_str()</strong> This method should be used when
|
||||
strings are to be used in LIKE conditions so that LIKE wildcards
|
||||
(‘%’, ‘_’) in the string are also properly escaped.</p>
|
||||
</li>
|
||||
</ol>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$search</span> <span class="o">=</span> <span class="s1">'20% raise'</span><span class="p">;</span>
|
||||
<span class="nv">$sql</span> <span class="o">=</span> <span class="s2">"SELECT id FROM table WHERE column LIKE '%"</span> <span class="o">.</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">escape_like_str</span><span class="p">(</span><span class="nv">$search</span><span class="p">)</span><span class="o">.</span><span class="s2">"%' ESCAPE '!'"</span><span class="p">;</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="admonition important">
|
||||
<p class="first admonition-title">Important</p>
|
||||
<p class="last">The <code class="docutils literal"><span class="pre">escape_like_str()</span></code> method uses ‘!’ (exclamation mark)
|
||||
to escape special characters for <em>LIKE</em> conditions. Because this
|
||||
method escapes partial strings that you would wrap in quotes
|
||||
yourself, it cannot automatically add the <code class="docutils literal"><span class="pre">ESCAPE</span> <span class="pre">'!'</span></code>
|
||||
condition for you, and so you’ll have to manually do that.</p>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="query-bindings">
|
||||
<h2>Query Bindings<a class="headerlink" href="#query-bindings" title="Permalink to this headline">¶</a></h2>
|
||||
<p>Bindings enable you to simplify your query syntax by letting the system
|
||||
put the queries together for you. Consider the following example:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$sql</span> <span class="o">=</span> <span class="s2">"SELECT * FROM some_table WHERE id = ? AND status = ? AND author = ?"</span><span class="p">;</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="nv">$sql</span><span class="p">,</span> <span class="k">array</span><span class="p">(</span><span class="mi">3</span><span class="p">,</span> <span class="s1">'live'</span><span class="p">,</span> <span class="s1">'Rick'</span><span class="p">));</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>The question marks in the query are automatically replaced with the
|
||||
values in the array in the second parameter of the query function.</p>
|
||||
<p>Binding also work with arrays, which will be transformed to IN sets:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$sql</span> <span class="o">=</span> <span class="s2">"SELECT * FROM some_table WHERE id IN ? AND status = ? AND author = ?"</span><span class="p">;</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="nv">$sql</span><span class="p">,</span> <span class="k">array</span><span class="p">(</span><span class="k">array</span><span class="p">(</span><span class="mi">3</span><span class="p">,</span> <span class="mi">6</span><span class="p">),</span> <span class="s1">'live'</span><span class="p">,</span> <span class="s1">'Rick'</span><span class="p">));</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>The resulting query will be:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">SELECT</span> <span class="o">*</span> <span class="nx">FROM</span> <span class="nx">some_table</span> <span class="nx">WHERE</span> <span class="nx">id</span> <span class="nx">IN</span> <span class="p">(</span><span class="mi">3</span><span class="p">,</span><span class="mi">6</span><span class="p">)</span> <span class="k">AND</span> <span class="nx">status</span> <span class="o">=</span> <span class="s1">'live'</span> <span class="k">AND</span> <span class="nx">author</span> <span class="o">=</span> <span class="s1">'Rick'</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>The secondary benefit of using binds is that the values are
|
||||
automatically escaped, producing safer queries. You don’t have to
|
||||
remember to manually escape data; the engine does it automatically for
|
||||
you.</p>
|
||||
</div>
|
||||
<div class="section" id="handling-errors">
|
||||
<h2>Handling Errors<a class="headerlink" href="#handling-errors" title="Permalink to this headline">¶</a></h2>
|
||||
<p><strong>$this->db->error();</strong></p>
|
||||
<p>If you need to get the last error that has occurred, the error() method
|
||||
will return an array containing its code and message. Here’s a quick
|
||||
example:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">if</span> <span class="p">(</span> <span class="o">!</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">simple_query</span><span class="p">(</span><span class="s1">'SELECT `example_field` FROM `example_table`'</span><span class="p">))</span>
|
||||
<span class="p">{</span>
|
||||
<span class="nv">$error</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">error</span><span class="p">();</span> <span class="c1">// Has keys 'code' and 'message'</span>
|
||||
<span class="p">}</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
|
||||
</div>
|
||||
<footer>
|
||||
|
||||
<div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
|
||||
|
||||
<a href="results.html" class="btn btn-neutral float-right" title="Generating Query Results">Next <span class="fa fa-arrow-circle-right"></span></a>
|
||||
|
||||
|
||||
<a href="connecting.html" class="btn btn-neutral" title="Connecting to your Database"><span class="fa fa-arrow-circle-left"></span> Previous</a>
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
<hr/>
|
||||
|
||||
<div role="contentinfo">
|
||||
<p>
|
||||
© Copyright 2014 - 2019, British Columbia Institute of Technology.
|
||||
Last updated on Sep 19, 2019.
|
||||
</p>
|
||||
</div>
|
||||
|
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Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>.
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</footer>
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</div>
|
||||
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||||
</section>
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|
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|
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|
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|
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|
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<script type="text/javascript">
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var DOCUMENTATION_OPTIONS = {
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jQuery(function () {
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</body>
|
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</html>
|
||||
2715
user_guide/database/query_builder.html
Executable file
2715
user_guide/database/query_builder.html
Executable file
File diff suppressed because it is too large
Load Diff
1231
user_guide/database/results.html
Executable file
1231
user_guide/database/results.html
Executable file
File diff suppressed because it is too large
Load Diff
615
user_guide/database/transactions.html
Executable file
615
user_guide/database/transactions.html
Executable file
@ -0,0 +1,615 @@
|
||||
|
||||
|
||||
<!DOCTYPE html>
|
||||
<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
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<title>Transactions — CodeIgniter 3.1.11 documentation</title>
|
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|
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|
||||
|
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|
||||
<link rel="shortcut icon" href="../_static/ci-icon.ico"/>
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<link href='https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic|Roboto+Slab:400,700|Inconsolata:400,700&subset=latin,cyrillic' rel='stylesheet' type='text/css'>
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|
||||
|
||||
<link rel="stylesheet" href="../_static/css/citheme.css" type="text/css" />
|
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||||
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<link rel="index" title="Index"
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href="../genindex.html"/>
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<link rel="search" title="Search" href="../search.html"/>
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<link rel="top" title="CodeIgniter 3.1.11 documentation" href="../index.html"/>
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<link rel="up" title="Database Reference" href="index.html"/>
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<link rel="next" title="Database Metadata" href="metadata.html"/>
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<link rel="prev" title="Query Builder Class" href="query_builder.html"/>
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<li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a></li>
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</ul>
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/upgrading.html">Upgrading From a Previous Version</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../installation/troubleshooting.html">Troubleshooting</a></li>
|
||||
</ul>
|
||||
</li>
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</ul>
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="../overview/index.html">CodeIgniter Overview</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../overview/getting_started.html">Getting Started</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/at_a_glance.html">CodeIgniter at a Glance</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../overview/features.html">Supported Features</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/appflow.html">Application Flow Chart</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/mvc.html">Model-View-Controller</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
|
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</ul>
|
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</li>
|
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="../tutorial/index.html">Tutorial</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../tutorial/static_pages.html">Static pages</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/news_section.html">News section</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../tutorial/create_news_items.html">Create news items</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
|
||||
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|
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|
||||
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|
||||
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<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/common_functions.html">Common Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/compatibility_functions.html">Compatibility Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/errors.html">Error Handling</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/caching.html">Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/security.html">Security</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
|
||||
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|
||||
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|
||||
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|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul class="current">
|
||||
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Database Reference</a><ul class="current">
|
||||
<li class="toctree-l2"><a class="reference internal" href="examples.html">Quick Start: Usage Examples</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="queries.html">Running Queries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l2 current"><a class="current reference internal" href="#">Transactions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting MetaData</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="caching.html">Query Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
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|
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<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/urls.html">CodeIgniter URLs</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/controllers.html">Controllers</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/reserved_names.html">Reserved Names</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/views.html">Views</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/models.html">Models</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/helpers.html">Helpers</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/libraries.html">Using CodeIgniter Libraries</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/drivers.html">Using CodeIgniter Drivers</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/core_classes.html">Creating Core System Classes</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../general/autoloader.html">Auto-loading Resources</a></li>
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||||
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||||
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<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
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||||
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||||
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/profiling.html">Profiling Your Application</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
|
||||
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||||
<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
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||||
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<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul class="current">
|
||||
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Database Reference</a><ul class="current">
|
||||
<li class="toctree-l2"><a class="reference internal" href="examples.html">Quick Start: Usage Examples</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="queries.html">Running Queries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l2 current"><a class="current reference internal" href="#">Transactions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting MetaData</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="caching.html">Query Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="utilities.html">Database Utilities Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
|
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<div class="section" id="transactions">
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<h1>Transactions<a class="headerlink" href="#transactions" title="Permalink to this headline">¶</a></h1>
|
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<p>CodeIgniter’s database abstraction allows you to use transactions with
|
||||
databases that support transaction-safe table types. In MySQL, you’ll
|
||||
need to be running InnoDB or BDB table types rather than the more common
|
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MyISAM. Most other database platforms support transactions natively.</p>
|
||||
<p>If you are not familiar with transactions we recommend you find a good
|
||||
online resource to learn about them for your particular database. The
|
||||
information below assumes you have a basic understanding of
|
||||
transactions.</p>
|
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<div class="section" id="codeigniter-s-approach-to-transactions">
|
||||
<h2>CodeIgniter’s Approach to Transactions<a class="headerlink" href="#codeigniter-s-approach-to-transactions" title="Permalink to this headline">¶</a></h2>
|
||||
<p>CodeIgniter utilizes an approach to transactions that is very similar to
|
||||
the process used by the popular database class ADODB. We’ve chosen that
|
||||
approach because it greatly simplifies the process of running
|
||||
transactions. In most cases all that is required are two lines of code.</p>
|
||||
<p>Traditionally, transactions have required a fair amount of work to
|
||||
implement since they demand that you keep track of your queries and
|
||||
determine whether to commit or rollback based on the success or failure
|
||||
of your queries. This is particularly cumbersome with nested queries. In
|
||||
contrast, we’ve implemented a smart transaction system that does all
|
||||
this for you automatically (you can also manage your transactions
|
||||
manually if you choose to, but there’s really no benefit).</p>
|
||||
</div>
|
||||
<div class="section" id="running-transactions">
|
||||
<h2>Running Transactions<a class="headerlink" href="#running-transactions" title="Permalink to this headline">¶</a></h2>
|
||||
<p>To run your queries using transactions you will use the
|
||||
$this->db->trans_start() and $this->db->trans_complete() functions as
|
||||
follows:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_start</span><span class="p">();</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'AN SQL QUERY...'</span><span class="p">);</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'ANOTHER QUERY...'</span><span class="p">);</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'AND YET ANOTHER QUERY...'</span><span class="p">);</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_complete</span><span class="p">();</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>You can run as many queries as you want between the start/complete
|
||||
functions and they will all be committed or rolled back based on success
|
||||
or failure of any given query.</p>
|
||||
</div>
|
||||
<div class="section" id="strict-mode">
|
||||
<h2>Strict Mode<a class="headerlink" href="#strict-mode" title="Permalink to this headline">¶</a></h2>
|
||||
<p>By default CodeIgniter runs all transactions in Strict Mode. When strict
|
||||
mode is enabled, if you are running multiple groups of transactions, if
|
||||
one group fails all groups will be rolled back. If strict mode is
|
||||
disabled, each group is treated independently, meaning a failure of one
|
||||
group will not affect any others.</p>
|
||||
<p>Strict Mode can be disabled as follows:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_strict</span><span class="p">(</span><span class="k">FALSE</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="managing-errors">
|
||||
<h2>Managing Errors<a class="headerlink" href="#managing-errors" title="Permalink to this headline">¶</a></h2>
|
||||
<p>If you have error reporting enabled in your config/database.php file
|
||||
you’ll see a standard error message if the commit was unsuccessful. If
|
||||
debugging is turned off, you can manage your own errors like this:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_start</span><span class="p">();</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'AN SQL QUERY...'</span><span class="p">);</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'ANOTHER QUERY...'</span><span class="p">);</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_complete</span><span class="p">();</span>
|
||||
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_status</span><span class="p">()</span> <span class="o">===</span> <span class="k">FALSE</span><span class="p">)</span>
|
||||
<span class="p">{</span>
|
||||
<span class="c1">// generate an error... or use the log_message() function to log your error</span>
|
||||
<span class="p">}</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="disabling-transactions">
|
||||
<h2>Disabling Transactions<a class="headerlink" href="#disabling-transactions" title="Permalink to this headline">¶</a></h2>
|
||||
<p>If you would like to disable transactions you can do so using
|
||||
<code class="docutils literal"><span class="pre">$this->db->trans_off()</span></code>:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_off</span><span class="p">();</span>
|
||||
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_start</span><span class="p">();</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'AN SQL QUERY...'</span><span class="p">);</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_complete</span><span class="p">();</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>When transactions are disabled, your queries will be auto-committed, just as
|
||||
they are when running queries without transactions, practically ignoring
|
||||
any calls to <code class="docutils literal"><span class="pre">trans_start()</span></code>, <code class="docutils literal"><span class="pre">trans_complete()</span></code>, etc.</p>
|
||||
</div>
|
||||
<div class="section" id="test-mode">
|
||||
<h2>Test Mode<a class="headerlink" href="#test-mode" title="Permalink to this headline">¶</a></h2>
|
||||
<p>You can optionally put the transaction system into “test mode”, which
|
||||
will cause your queries to be rolled back – even if the queries produce
|
||||
a valid result. To use test mode simply set the first parameter in the
|
||||
$this->db->trans_start() function to TRUE:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_start</span><span class="p">(</span><span class="k">TRUE</span><span class="p">);</span> <span class="c1">// Query will be rolled back</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'AN SQL QUERY...'</span><span class="p">);</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_complete</span><span class="p">();</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="running-transactions-manually">
|
||||
<h2>Running Transactions Manually<a class="headerlink" href="#running-transactions-manually" title="Permalink to this headline">¶</a></h2>
|
||||
<p>If you would like to run transactions manually you can do so as follows:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_begin</span><span class="p">();</span>
|
||||
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'AN SQL QUERY...'</span><span class="p">);</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'ANOTHER QUERY...'</span><span class="p">);</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s1">'AND YET ANOTHER QUERY...'</span><span class="p">);</span>
|
||||
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_status</span><span class="p">()</span> <span class="o">===</span> <span class="k">FALSE</span><span class="p">)</span>
|
||||
<span class="p">{</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_rollback</span><span class="p">();</span>
|
||||
<span class="p">}</span>
|
||||
<span class="k">else</span>
|
||||
<span class="p">{</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">trans_commit</span><span class="p">();</span>
|
||||
<span class="p">}</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">Make sure to use $this->db->trans_begin() when running manual
|
||||
transactions, <strong>NOT</strong> $this->db->trans_start().</p>
|
||||
</div>
|
||||
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|
||||
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|
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|
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<p>
|
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© Copyright 2014 - 2019, British Columbia Institute of Technology.
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Last updated on Sep 19, 2019.
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|
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</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../tutorial/index.html">Tutorial</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/static_pages.html">Static pages</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/news_section.html">News section</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/create_news_items.html">Create news items</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../contributing/index.html">Contributing to CodeIgniter</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../documentation/index.html">Writing CodeIgniter Documentation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../DCO.html">Developer’s Certificate of Origin 1.1</a></li>
|
||||
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|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../general/index.html">General Topics</a><ul>
|
||||
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|
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||||
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||||
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|
||||
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||||
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||||
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_libraries.html">Creating Libraries</a></li>
|
||||
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/creating_drivers.html">Creating Drivers</a></li>
|
||||
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|
||||
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/hooks.html">Hooks - Extending the Framework Core</a></li>
|
||||
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|
||||
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|
||||
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/routing.html">URI Routing</a></li>
|
||||
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|
||||
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|
||||
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/cli.html">Running via the CLI</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/managing_apps.html">Managing your Applications</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/environments.html">Handling Multiple Environments</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/alternative_php.html">Alternate PHP Syntax for View Files</a></li>
|
||||
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|
||||
<li class="toctree-l2"><a class="reference internal" href="../general/styleguide.html">PHP Style Guide</a></li>
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
<li class="toctree-l1"><a class="reference internal" href="../libraries/index.html">Libraries</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/benchmark.html">Benchmarking Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/file_uploading.html">File Uploading Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/form_validation.html">Form Validation</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/image_lib.html">Image Manipulation Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/input.html">Input Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/javascript.html">Javascript Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/language.html">Language Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/loader.html">Loader Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/migration.html">Migrations Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/pagination.html">Pagination Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul class="current">
|
||||
<li class="toctree-l1 current"><a class="reference internal" href="index.html">Database Reference</a><ul class="current">
|
||||
<li class="toctree-l2"><a class="reference internal" href="examples.html">Quick Start: Usage Examples</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="configuration.html">Database Configuration</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="connecting.html">Connecting to a Database</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="queries.html">Running Queries</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="results.html">Generating Query Results</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="helpers.html">Query Helper Functions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="query_builder.html">Query Builder Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="transactions.html">Transactions</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="metadata.html">Getting MetaData</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="call_function.html">Custom Function Calls</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="caching.html">Query Caching</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="forge.html">Database Manipulation with Database Forge</a></li>
|
||||
<li class="toctree-l2 current"><a class="current reference internal" href="#">Database Utilities Class</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="db_driver_reference.html">Database Driver Reference</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<ul>
|
||||
<li class="toctree-l1"><a class="reference internal" href="../helpers/index.html">Helpers</a><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/array_helper.html">Array Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/captcha_helper.html">CAPTCHA Helper</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../helpers/cookie_helper.html">Cookie Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/date_helper.html">Date Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/directory_helper.html">Directory Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/download_helper.html">Download Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/email_helper.html">Email Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/file_helper.html">File Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/form_helper.html">Form Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/html_helper.html">HTML Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../helpers/language_helper.html">Language Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/number_helper.html">Number Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/path_helper.html">Path Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/security_helper.html">Security Helper</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../helpers/smiley_helper.html">Smiley Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/string_helper.html">String Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/text_helper.html">Text Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/typography_helper.html">Typography Helper</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../helpers/url_helper.html">URL Helper</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../helpers/xml_helper.html">XML Helper</a></li>
|
||||
</ul>
|
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</li>
|
||||
</ul>
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<a href="../index.html" class="fa fa-home"> CodeIgniter</a>
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<li class="toctree-l1"><a class="reference internal" href="../general/welcome.html">Welcome to CodeIgniter</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../installation/index.html">Installation Instructions</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../installation/downloads.html">Downloading CodeIgniter</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../installation/index.html">Installation Instructions</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../overview/index.html">CodeIgniter Overview</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="../overview/getting_started.html">Getting Started</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/at_a_glance.html">CodeIgniter at a Glance</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/features.html">Supported Features</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/appflow.html">Application Flow Chart</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/mvc.html">Model-View-Controller</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../overview/goals.html">Architectural Goals</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../tutorial/create_news_items.html">Create news items</a></li>
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||||
<li class="toctree-l2"><a class="reference internal" href="../tutorial/conclusion.html">Conclusion</a></li>
|
||||
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||||
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||||
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||||
<ul>
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<div role="main" class="document">
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<div class="section" id="database-utility-class">
|
||||
<h1>Database Utility Class<a class="headerlink" href="#database-utility-class" title="Permalink to this headline">¶</a></h1>
|
||||
<p>The Database Utility Class contains methods that help you manage your
|
||||
database.</p>
|
||||
<div class="contents local topic" id="contents">
|
||||
<ul class="simple">
|
||||
<li><a class="reference internal" href="#initializing-the-utility-class" id="id1">Initializing the Utility Class</a></li>
|
||||
<li><a class="reference internal" href="#using-the-database-utilities" id="id2">Using the Database Utilities</a><ul>
|
||||
<li><a class="reference internal" href="#retrieve-list-of-database-names" id="id3">Retrieve list of database names</a></li>
|
||||
<li><a class="reference internal" href="#determine-if-a-database-exists" id="id4">Determine If a Database Exists</a></li>
|
||||
<li><a class="reference internal" href="#optimize-a-table" id="id5">Optimize a Table</a></li>
|
||||
<li><a class="reference internal" href="#repair-a-table" id="id6">Repair a Table</a></li>
|
||||
<li><a class="reference internal" href="#optimize-a-database" id="id7">Optimize a Database</a></li>
|
||||
<li><a class="reference internal" href="#export-a-query-result-as-a-csv-file" id="id8">Export a Query Result as a CSV File</a></li>
|
||||
<li><a class="reference internal" href="#export-a-query-result-as-an-xml-document" id="id9">Export a Query Result as an XML Document</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
<li><a class="reference internal" href="#backup-your-database" id="id10">Backup Your Database</a><ul>
|
||||
<li><a class="reference internal" href="#database-backup-notes" id="id11">Database Backup Notes</a></li>
|
||||
<li><a class="reference internal" href="#usage-example" id="id12">Usage Example</a></li>
|
||||
<li><a class="reference internal" href="#setting-backup-preferences" id="id13">Setting Backup Preferences</a></li>
|
||||
<li><a class="reference internal" href="#description-of-backup-preferences" id="id14">Description of Backup Preferences</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
<li><a class="reference internal" href="#class-reference" id="id15">Class Reference</a></li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="section" id="initializing-the-utility-class">
|
||||
<h2><a class="toc-backref" href="#id1">Initializing the Utility Class</a><a class="headerlink" href="#initializing-the-utility-class" title="Permalink to this headline">¶</a></h2>
|
||||
<div class="admonition important">
|
||||
<p class="first admonition-title">Important</p>
|
||||
<p class="last">In order to initialize the Utility class, your database
|
||||
driver must already be running, since the utilities class relies on it.</p>
|
||||
</div>
|
||||
<p>Load the Utility Class as follows:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">dbutil</span><span class="p">();</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>You can also pass another database object to the DB Utility loader, in case
|
||||
the database you want to manage isn’t the default one:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">myutil</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">dbutil</span><span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">other_db</span><span class="p">,</span> <span class="k">TRUE</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>In the above example, we’re passing a custom database object as the first
|
||||
parameter and then tell it to return the dbutil object, instead of
|
||||
assigning it directly to <code class="docutils literal"><span class="pre">$this->dbutil</span></code>.</p>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">Both of the parameters can be used individually, just pass an empty
|
||||
value as the first one if you wish to skip it.</p>
|
||||
</div>
|
||||
<p>Once initialized you will access the methods using the <code class="docutils literal"><span class="pre">$this->dbutil</span></code>
|
||||
object:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">some_method</span><span class="p">();</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="using-the-database-utilities">
|
||||
<h2><a class="toc-backref" href="#id2">Using the Database Utilities</a><a class="headerlink" href="#using-the-database-utilities" title="Permalink to this headline">¶</a></h2>
|
||||
<div class="section" id="retrieve-list-of-database-names">
|
||||
<h3><a class="toc-backref" href="#id3">Retrieve list of database names</a><a class="headerlink" href="#retrieve-list-of-database-names" title="Permalink to this headline">¶</a></h3>
|
||||
<p>Returns an array of database names:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$dbs</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">list_databases</span><span class="p">();</span>
|
||||
|
||||
<span class="k">foreach</span> <span class="p">(</span><span class="nv">$dbs</span> <span class="k">as</span> <span class="nv">$db</span><span class="p">)</span>
|
||||
<span class="p">{</span>
|
||||
<span class="k">echo</span> <span class="nv">$db</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="determine-if-a-database-exists">
|
||||
<h3><a class="toc-backref" href="#id4">Determine If a Database Exists</a><a class="headerlink" href="#determine-if-a-database-exists" title="Permalink to this headline">¶</a></h3>
|
||||
<p>Sometimes it’s helpful to know whether a particular database exists.
|
||||
Returns a boolean TRUE/FALSE. Usage example:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">if</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">database_exists</span><span class="p">(</span><span class="s1">'database_name'</span><span class="p">))</span>
|
||||
<span class="p">{</span>
|
||||
<span class="c1">// some code...</span>
|
||||
<span class="p">}</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">Replace <em>database_name</em> with the name of the database you are
|
||||
looking for. This method is case sensitive.</p>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="optimize-a-table">
|
||||
<h3><a class="toc-backref" href="#id5">Optimize a Table</a><a class="headerlink" href="#optimize-a-table" title="Permalink to this headline">¶</a></h3>
|
||||
<p>Permits you to optimize a table using the table name specified in the
|
||||
first parameter. Returns TRUE/FALSE based on success or failure:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">if</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">optimize_table</span><span class="p">(</span><span class="s1">'table_name'</span><span class="p">))</span>
|
||||
<span class="p">{</span>
|
||||
<span class="k">echo</span> <span class="s1">'Success!'</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">Not all database platforms support table optimization. It is
|
||||
mostly for use with MySQL.</p>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="repair-a-table">
|
||||
<h3><a class="toc-backref" href="#id6">Repair a Table</a><a class="headerlink" href="#repair-a-table" title="Permalink to this headline">¶</a></h3>
|
||||
<p>Permits you to repair a table using the table name specified in the
|
||||
first parameter. Returns TRUE/FALSE based on success or failure:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="k">if</span> <span class="p">(</span><span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">repair_table</span><span class="p">(</span><span class="s1">'table_name'</span><span class="p">))</span>
|
||||
<span class="p">{</span>
|
||||
<span class="k">echo</span> <span class="s1">'Success!'</span><span class="p">;</span>
|
||||
<span class="p">}</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">Not all database platforms support table repairs.</p>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="optimize-a-database">
|
||||
<h3><a class="toc-backref" href="#id7">Optimize a Database</a><a class="headerlink" href="#optimize-a-database" title="Permalink to this headline">¶</a></h3>
|
||||
<p>Permits you to optimize the database your DB class is currently
|
||||
connected to. Returns an array containing the DB status messages or
|
||||
FALSE on failure.</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$result</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">optimize_database</span><span class="p">();</span>
|
||||
|
||||
<span class="k">if</span> <span class="p">(</span><span class="nv">$result</span> <span class="o">!==</span> <span class="k">FALSE</span><span class="p">)</span>
|
||||
<span class="p">{</span>
|
||||
<span class="nb">print_r</span><span class="p">(</span><span class="nv">$result</span><span class="p">);</span>
|
||||
<span class="p">}</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">Not all database platforms support database optimization. It
|
||||
it is mostly for use with MySQL.</p>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="export-a-query-result-as-a-csv-file">
|
||||
<h3><a class="toc-backref" href="#id8">Export a Query Result as a CSV File</a><a class="headerlink" href="#export-a-query-result-as-a-csv-file" title="Permalink to this headline">¶</a></h3>
|
||||
<p>Permits you to generate a CSV file from a query result. The first
|
||||
parameter of the method must contain the result object from your
|
||||
query. Example:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">dbutil</span><span class="p">();</span>
|
||||
|
||||
<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s2">"SELECT * FROM mytable"</span><span class="p">);</span>
|
||||
|
||||
<span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">csv_from_result</span><span class="p">(</span><span class="nv">$query</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>The second, third, and fourth parameters allow you to set the delimiter
|
||||
newline, and enclosure characters respectively. By default commas are
|
||||
used as the delimiter, “n” is used as a new line, and a double-quote
|
||||
is used as the enclosure. Example:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$delimiter</span> <span class="o">=</span> <span class="s2">","</span><span class="p">;</span>
|
||||
<span class="nv">$newline</span> <span class="o">=</span> <span class="s2">"</span><span class="se">\r\n</span><span class="s2">"</span><span class="p">;</span>
|
||||
<span class="nv">$enclosure</span> <span class="o">=</span> <span class="s1">'"'</span><span class="p">;</span>
|
||||
|
||||
<span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">csv_from_result</span><span class="p">(</span><span class="nv">$query</span><span class="p">,</span> <span class="nv">$delimiter</span><span class="p">,</span> <span class="nv">$newline</span><span class="p">,</span> <span class="nv">$enclosure</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="admonition important">
|
||||
<p class="first admonition-title">Important</p>
|
||||
<p class="last">This method will NOT write the CSV file for you. It
|
||||
simply creates the CSV layout. If you need to write the file
|
||||
use the <a class="reference internal" href="../helpers/file_helper.html"><span class="doc">File Helper</span></a>.</p>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="export-a-query-result-as-an-xml-document">
|
||||
<h3><a class="toc-backref" href="#id9">Export a Query Result as an XML Document</a><a class="headerlink" href="#export-a-query-result-as-an-xml-document" title="Permalink to this headline">¶</a></h3>
|
||||
<p>Permits you to generate an XML file from a query result. The first
|
||||
parameter expects a query result object, the second may contain an
|
||||
optional array of config parameters. Example:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">dbutil</span><span class="p">();</span>
|
||||
|
||||
<span class="nv">$query</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">db</span><span class="o">-></span><span class="na">query</span><span class="p">(</span><span class="s2">"SELECT * FROM mytable"</span><span class="p">);</span>
|
||||
|
||||
<span class="nv">$config</span> <span class="o">=</span> <span class="k">array</span> <span class="p">(</span>
|
||||
<span class="s1">'root'</span> <span class="o">=></span> <span class="s1">'root'</span><span class="p">,</span>
|
||||
<span class="s1">'element'</span> <span class="o">=></span> <span class="s1">'element'</span><span class="p">,</span>
|
||||
<span class="s1">'newline'</span> <span class="o">=></span> <span class="s2">"</span><span class="se">\n</span><span class="s2">"</span><span class="p">,</span>
|
||||
<span class="s1">'tab'</span> <span class="o">=></span> <span class="s2">"</span><span class="se">\t</span><span class="s2">"</span>
|
||||
<span class="p">);</span>
|
||||
|
||||
<span class="k">echo</span> <span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">xml_from_result</span><span class="p">(</span><span class="nv">$query</span><span class="p">,</span> <span class="nv">$config</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="admonition important">
|
||||
<p class="first admonition-title">Important</p>
|
||||
<p class="last">This method will NOT write the XML file for you. It
|
||||
simply creates the XML layout. If you need to write the file
|
||||
use the <a class="reference internal" href="../helpers/file_helper.html"><span class="doc">File Helper</span></a>.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="backup-your-database">
|
||||
<h2><a class="toc-backref" href="#id10">Backup Your Database</a><a class="headerlink" href="#backup-your-database" title="Permalink to this headline">¶</a></h2>
|
||||
<div class="section" id="database-backup-notes">
|
||||
<h3><a class="toc-backref" href="#id11">Database Backup Notes</a><a class="headerlink" href="#database-backup-notes" title="Permalink to this headline">¶</a></h3>
|
||||
<p>Permits you to backup your full database or individual tables. The
|
||||
backup data can be compressed in either Zip or Gzip format.</p>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">This feature is only available for MySQL and Interbase/Firebird databases.</p>
|
||||
</div>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p>For Interbase/Firebird databases, the backup file name is the only parameter.</p>
|
||||
<p class="last">$this->dbutil->backup(‘db_backup_filename’);</p>
|
||||
</div>
|
||||
<div class="admonition note">
|
||||
<p class="first admonition-title">Note</p>
|
||||
<p class="last">Due to the limited execution time and memory available to PHP,
|
||||
backing up very large databases may not be possible. If your database is
|
||||
very large you might need to backup directly from your SQL server via
|
||||
the command line, or have your server admin do it for you if you do not
|
||||
have root privileges.</p>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="usage-example">
|
||||
<h3><a class="toc-backref" href="#id12">Usage Example</a><a class="headerlink" href="#usage-example" title="Permalink to this headline">¶</a></h3>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="c1">// Load the DB utility class</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">dbutil</span><span class="p">();</span>
|
||||
|
||||
<span class="c1">// Backup your entire database and assign it to a variable</span>
|
||||
<span class="nv">$backup</span> <span class="o">=</span> <span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">backup</span><span class="p">();</span>
|
||||
|
||||
<span class="c1">// Load the file helper and write the file to your server</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">helper</span><span class="p">(</span><span class="s1">'file'</span><span class="p">);</span>
|
||||
<span class="nx">write_file</span><span class="p">(</span><span class="s1">'/path/to/mybackup.gz'</span><span class="p">,</span> <span class="nv">$backup</span><span class="p">);</span>
|
||||
|
||||
<span class="c1">// Load the download helper and send the file to your desktop</span>
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">load</span><span class="o">-></span><span class="na">helper</span><span class="p">(</span><span class="s1">'download'</span><span class="p">);</span>
|
||||
<span class="nx">force_download</span><span class="p">(</span><span class="s1">'mybackup.gz'</span><span class="p">,</span> <span class="nv">$backup</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="setting-backup-preferences">
|
||||
<h3><a class="toc-backref" href="#id13">Setting Backup Preferences</a><a class="headerlink" href="#setting-backup-preferences" title="Permalink to this headline">¶</a></h3>
|
||||
<p>Backup preferences are set by submitting an array of values to the first
|
||||
parameter of the <code class="docutils literal"><span class="pre">backup()</span></code> method. Example:</p>
|
||||
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nv">$prefs</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span>
|
||||
<span class="s1">'tables'</span> <span class="o">=></span> <span class="k">array</span><span class="p">(</span><span class="s1">'table1'</span><span class="p">,</span> <span class="s1">'table2'</span><span class="p">),</span> <span class="c1">// Array of tables to backup.</span>
|
||||
<span class="s1">'ignore'</span> <span class="o">=></span> <span class="k">array</span><span class="p">(),</span> <span class="c1">// List of tables to omit from the backup</span>
|
||||
<span class="s1">'format'</span> <span class="o">=></span> <span class="s1">'txt'</span><span class="p">,</span> <span class="c1">// gzip, zip, txt</span>
|
||||
<span class="s1">'filename'</span> <span class="o">=></span> <span class="s1">'mybackup.sql'</span><span class="p">,</span> <span class="c1">// File name - NEEDED ONLY WITH ZIP FILES</span>
|
||||
<span class="s1">'add_drop'</span> <span class="o">=></span> <span class="k">TRUE</span><span class="p">,</span> <span class="c1">// Whether to add DROP TABLE statements to backup file</span>
|
||||
<span class="s1">'add_insert'</span> <span class="o">=></span> <span class="k">TRUE</span><span class="p">,</span> <span class="c1">// Whether to add INSERT data to backup file</span>
|
||||
<span class="s1">'newline'</span> <span class="o">=></span> <span class="s2">"</span><span class="se">\n</span><span class="s2">"</span> <span class="c1">// Newline character used in backup file</span>
|
||||
<span class="p">);</span>
|
||||
|
||||
<span class="nv">$this</span><span class="o">-></span><span class="na">dbutil</span><span class="o">-></span><span class="na">backup</span><span class="p">(</span><span class="nv">$prefs</span><span class="p">);</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="description-of-backup-preferences">
|
||||
<h3><a class="toc-backref" href="#id14">Description of Backup Preferences</a><a class="headerlink" href="#description-of-backup-preferences" title="Permalink to this headline">¶</a></h3>
|
||||
<table border="1" class="docutils">
|
||||
<colgroup>
|
||||
<col width="16%" />
|
||||
<col width="16%" />
|
||||
<col width="16%" />
|
||||
<col width="51%" />
|
||||
</colgroup>
|
||||
<thead valign="bottom">
|
||||
<tr class="row-odd"><th class="head">Preference</th>
|
||||
<th class="head">Default Value</th>
|
||||
<th class="head">Options</th>
|
||||
<th class="head">Description</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody valign="top">
|
||||
<tr class="row-even"><td><strong>tables</strong></td>
|
||||
<td>empty array</td>
|
||||
<td>None</td>
|
||||
<td>An array of tables you want backed up. If left blank all tables will be
|
||||
exported.</td>
|
||||
</tr>
|
||||
<tr class="row-odd"><td><strong>ignore</strong></td>
|
||||
<td>empty array</td>
|
||||
<td>None</td>
|
||||
<td>An array of tables you want the backup routine to ignore.</td>
|
||||
</tr>
|
||||
<tr class="row-even"><td><strong>format</strong></td>
|
||||
<td>gzip</td>
|
||||
<td>gzip, zip, txt</td>
|
||||
<td>The file format of the export file.</td>
|
||||
</tr>
|
||||
<tr class="row-odd"><td><strong>filename</strong></td>
|
||||
<td>the current date/time</td>
|
||||
<td>None</td>
|
||||
<td>The name of the backed-up file. The name is needed only if you are using
|
||||
zip compression.</td>
|
||||
</tr>
|
||||
<tr class="row-even"><td><strong>add_drop</strong></td>
|
||||
<td>TRUE</td>
|
||||
<td>TRUE/FALSE</td>
|
||||
<td>Whether to include DROP TABLE statements in your SQL export file.</td>
|
||||
</tr>
|
||||
<tr class="row-odd"><td><strong>add_insert</strong></td>
|
||||
<td>TRUE</td>
|
||||
<td>TRUE/FALSE</td>
|
||||
<td>Whether to include INSERT statements in your SQL export file.</td>
|
||||
</tr>
|
||||
<tr class="row-even"><td><strong>newline</strong></td>
|
||||
<td>“\n”</td>
|
||||
<td>“\n”, “\r”, “\r\n”</td>
|
||||
<td>Type of newline to use in your SQL export file.</td>
|
||||
</tr>
|
||||
<tr class="row-odd"><td><strong>foreign_key_checks</strong></td>
|
||||
<td>TRUE</td>
|
||||
<td>TRUE/FALSE</td>
|
||||
<td>Whether output should keep foreign key checks enabled.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="class-reference">
|
||||
<h2><a class="toc-backref" href="#id15">Class Reference</a><a class="headerlink" href="#class-reference" title="Permalink to this headline">¶</a></h2>
|
||||
<dl class="class">
|
||||
<dt id="CI_DB_utility">
|
||||
<em class="property">class </em><code class="descname">CI_DB_utility</code><a class="headerlink" href="#CI_DB_utility" title="Permalink to this definition">¶</a></dt>
|
||||
<dd><dl class="method">
|
||||
<dt id="CI_DB_utility::backup">
|
||||
<code class="descname">backup</code><span class="sig-paren">(</span><span class="optional">[</span><em>$params = array()</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_utility::backup" title="Permalink to this definition">¶</a></dt>
|
||||
<dd><table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
||||
<li><strong>$params</strong> (<em>array</em>) – An associative array of options</li>
|
||||
</ul>
|
||||
</td>
|
||||
</tr>
|
||||
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">raw/(g)zipped SQL query string</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">string</p>
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p>Perform a database backup, per user preferences.</p>
|
||||
</dd></dl>
|
||||
|
||||
<dl class="method">
|
||||
<dt id="CI_DB_utility::database_exists">
|
||||
<code class="descname">database_exists</code><span class="sig-paren">(</span><em>$database_name</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_utility::database_exists" title="Permalink to this definition">¶</a></dt>
|
||||
<dd><table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
||||
<li><strong>$database_name</strong> (<em>string</em>) – Database name</li>
|
||||
</ul>
|
||||
</td>
|
||||
</tr>
|
||||
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">TRUE if the database exists, FALSE otherwise</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">bool</p>
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p>Check for the existence of a database.</p>
|
||||
</dd></dl>
|
||||
|
||||
<dl class="method">
|
||||
<dt id="CI_DB_utility::list_databases">
|
||||
<code class="descname">list_databases</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_utility::list_databases" title="Permalink to this definition">¶</a></dt>
|
||||
<dd><table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">Array of database names found</td>
|
||||
</tr>
|
||||
<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">array</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p>Retrieve a list of all the database names.</p>
|
||||
</dd></dl>
|
||||
|
||||
<dl class="method">
|
||||
<dt id="CI_DB_utility::optimize_database">
|
||||
<code class="descname">optimize_database</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_utility::optimize_database" title="Permalink to this definition">¶</a></dt>
|
||||
<dd><table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field-odd field"><th class="field-name">Returns:</th><td class="field-body">Array of optimization messages or FALSE on failure</td>
|
||||
</tr>
|
||||
<tr class="field-even field"><th class="field-name">Return type:</th><td class="field-body">array</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p>Optimizes the database.</p>
|
||||
</dd></dl>
|
||||
|
||||
<dl class="method">
|
||||
<dt id="CI_DB_utility::optimize_table">
|
||||
<code class="descname">optimize_table</code><span class="sig-paren">(</span><em>$table_name</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_utility::optimize_table" title="Permalink to this definition">¶</a></dt>
|
||||
<dd><table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
||||
<li><strong>$table_name</strong> (<em>string</em>) – Name of the table to optimize</li>
|
||||
</ul>
|
||||
</td>
|
||||
</tr>
|
||||
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Array of optimization messages or FALSE on failure</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">array</p>
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p>Optimizes a database table.</p>
|
||||
</dd></dl>
|
||||
|
||||
<dl class="method">
|
||||
<dt id="CI_DB_utility::repair_table">
|
||||
<code class="descname">repair_table</code><span class="sig-paren">(</span><em>$table_name</em><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_utility::repair_table" title="Permalink to this definition">¶</a></dt>
|
||||
<dd><table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
||||
<li><strong>$table_name</strong> (<em>string</em>) – Name of the table to repair</li>
|
||||
</ul>
|
||||
</td>
|
||||
</tr>
|
||||
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">Array of repair messages or FALSE on failure</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">array</p>
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p>Repairs a database table.</p>
|
||||
</dd></dl>
|
||||
|
||||
<dl class="method">
|
||||
<dt id="CI_DB_utility::csv_from_result">
|
||||
<code class="descname">csv_from_result</code><span class="sig-paren">(</span><em>$query</em><span class="optional">[</span>, <em>$delim = '</em>, <em>'</em><span class="optional">[</span>, <em>$newline = "n"</em><span class="optional">[</span>, <em>$enclosure = '"'</em><span class="optional">]</span><span class="optional">]</span><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_utility::csv_from_result" title="Permalink to this definition">¶</a></dt>
|
||||
<dd><table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
||||
<li><strong>$query</strong> (<em>object</em>) – A database result object</li>
|
||||
<li><strong>$delim</strong> (<em>string</em>) – The CSV field delimiter to use</li>
|
||||
<li><strong>$newline</strong> (<em>string</em>) – The newline character to use</li>
|
||||
<li><strong>$enclosure</strong> (<em>string</em>) – The enclosure delimiter to use</li>
|
||||
</ul>
|
||||
</td>
|
||||
</tr>
|
||||
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">The generated CSV file as a string</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">string</p>
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p>Translates a database result object into a CSV document.</p>
|
||||
</dd></dl>
|
||||
|
||||
<dl class="method">
|
||||
<dt id="CI_DB_utility::xml_from_result">
|
||||
<code class="descname">xml_from_result</code><span class="sig-paren">(</span><em>$query</em><span class="optional">[</span>, <em>$params = array()</em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#CI_DB_utility::xml_from_result" title="Permalink to this definition">¶</a></dt>
|
||||
<dd><table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
|
||||
<li><strong>$query</strong> (<em>object</em>) – A database result object</li>
|
||||
<li><strong>$params</strong> (<em>array</em>) – An associative array of preferences</li>
|
||||
</ul>
|
||||
</td>
|
||||
</tr>
|
||||
<tr class="field-even field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">The generated XML document as a string</p>
|
||||
</td>
|
||||
</tr>
|
||||
<tr class="field-odd field"><th class="field-name">Return type:</th><td class="field-body"><p class="first last">string</p>
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p>Translates a database result object into an XML document.</p>
|
||||
</dd></dl>
|
||||
|
||||
</dd></dl>
|
||||
|
||||
</div>
|
||||
</div>
|
||||
|
||||
|
||||
</div>
|
||||
<footer>
|
||||
|
||||
<div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
|
||||
|
||||
<a href="db_driver_reference.html" class="btn btn-neutral float-right" title="DB Driver Reference">Next <span class="fa fa-arrow-circle-right"></span></a>
|
||||
|
||||
|
||||
<a href="forge.html" class="btn btn-neutral" title="Database Forge Class"><span class="fa fa-arrow-circle-left"></span> Previous</a>
|
||||
|
||||
</div>
|
||||
|
||||
|
||||
<hr/>
|
||||
|
||||
<div role="contentinfo">
|
||||
<p>
|
||||
© Copyright 2014 - 2019, British Columbia Institute of Technology.
|
||||
Last updated on Sep 19, 2019.
|
||||
</p>
|
||||
</div>
|
||||
|
||||
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||||
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||||
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|
||||
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|
||||
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|
||||
|
||||
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||||
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||||
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|
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|
||||
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|
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|
||||
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Reference in New Issue
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