758 lines
54 KiB
HTML
Executable File
758 lines
54 KiB
HTML
Executable File
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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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<!--[if gt IE 8]><!--> <html class="no-js" 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>Database Configuration — 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="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="Connecting to your Database" href="connecting.html"/>
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<link rel="prev" title="Database Quick Start: Example Code" href="examples.html"/>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.min.js"></script>
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</head>
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<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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<div id="pulldown-menu" class="ciNav">
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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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</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>
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<li class="toctree-l2"><a class="reference internal" href="../installation/troubleshooting.html">Troubleshooting</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="../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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</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="../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>
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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>
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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>
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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>
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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/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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<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>
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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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</li>
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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/email.html">Email Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/encrypt.html">Encrypt Class</a></li>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</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>
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<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>
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<li class="toctree-l2"><a class="reference internal" href="../libraries/parser.html">Template Parser Class</a></li>
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<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>
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<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 current"><a class="current reference internal" href="#">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"><a class="reference internal" href="caching.html">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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</div>
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</div>
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<div id="nav2">
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<a href="#" id="openToc">
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<img src="data:image/jpeg;base64,/9j/4AAQSkZJRgABAgAAZABkAAD/7AARRHVja3kAAQAEAAAARgAA/+4ADkFkb2JlAGTAAAAAAf/bAIQABAMDAwMDBAMDBAYEAwQGBwUEBAUHCAYGBwYGCAoICQkJCQgKCgwMDAwMCgwMDQ0MDBERERERFBQUFBQUFBQUFAEEBQUIBwgPCgoPFA4ODhQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQU/8AAEQgAKwCaAwERAAIRAQMRAf/EAHsAAQAABwEBAAAAAAAAAAAAAAABAwQFBgcIAgkBAQAAAAAAAAAAAAAAAAAAAAAQAAEDAwICBwYEAgsAAAAAAAIBAwQAEQUSBiEHkROTVNQWGDFBUVIUCHEiMtOUFWGBobHRQlMkZIRVEQEAAAAAAAAAAAAAAAAAAAAA/9oADAMBAAIRAxEAPwDSC+ygkOOaUoKigUCgUCgUCgUCgUCgUCgUCgkuGguIP9FBMFb0Hqg7We+3jlmIqqYFf4ub+/QYlnOR/LqIBKGFUbf8qWv971BytQXXE7Y3Lnm3HsFhp2TaZJAdchRXpIgSpdEJWxJEW3xoKV7F5OMy7JkQn2o7D6w33XGjEAkoiqrJEqIiOIiKuhePCgqp22dyYyS3CyWHnQ5joG61HkRnmnTbaFSMhExRVQRRVJU9iUHjE7ez+fJ0MFipmUNhBV8YUd2SoIV9KkjQla9ltegttBdPLW4/qocL+UTfrMiHW4+P9M71shuyrqaHTcxsl7jegpsji8nh5ZwMvDfgTm0RTjSmjYdFCS6KoOIipdFunCgmNYTMv457MMY6U7iI6oMieDDhRm1VbIhuoOkbqtuK0Hpzb+eZcYZexUxt6UyUqK2cd0SdjtgrhOgijcgERUlJOCIl6CpgbP3blRI8XgMjNARAyKNDfeRBdFDBVUAXgQrqH4pxoJTu2NysY97LP4ac1io5q1InHFeGO24LnVKJuKOkSQ/yKir+rh7aCLG1dzypZQI2FnvTgccYOM3FeN0XWERXAUEFVQgQkUktdLpegm+Td3/Xli/L+S/mYNJIOF9G/wBeLKrZHFb0akG6W1WtQWSg3Dyg5e7V3fipE3O4/wCrktyzYA+ufas2LbZIlmnAT2kvuoN1wft95augilglX/tzP3qCu9O3LL/wV/i5v79BvmTADq14UGu91467Z6U9y0HzH/ncj/U/sT/CgynZG7I2NezpZGUjIycJkYkZSG+uQ81pbBNKLxJfjwoMqZ3/ALYHl35AJ7/cuwHcu5k7r1Q5pHetBjquqVVJWGxj9Zrtcl/Ggy3dHMvauR3HFZj5nHNxSyW5JISYDMoIwx8tFIGHZhPNaykGapr6rUAiicEoMG21lMRj8buPAz8xhJrr7uOeiPTCyAwXUaGR1mgozbTusOsFLEiJ7fbQa/h7gcjy2H3V6xppwDNtUSxCJIqp7valBuWVzJ22xuCROXNNZiJkMtms0DbjUkAZjzoDrTMd9dDRI44ZC2YsrYdKWP2WDT2S3N9dNdlRYrGMYc06IURXSYb0igrpWS485xVNS6nF4rwslkoMwnbpgZLB7bmt5uMweAhDEl4B5uSLzzqTnnyVpW2jaJHRMSIjdDiiotvy3DOE5rYTEbkl5yFn28k7JyG4c7AU2HtLH1uKfaiMPI40CdYbpNtmLdwTSn5rewLNld+7TLdeal4WarWBkbVKBjgdElMJJwAAY5fl4kB3b1fp4XvagsGS3FjJfLzDNtS8aeXx7LzT7TyzByQE5PccRGRC0ZRUDRV6y62vbjagzLmJzS2vuPK43JY6aP1TW6Jz+RIWyFtyC06y3EkiiinAo7YCqfq1AqqnGgsOH3lhZO8d1pmcpB8j5XIm9OYlBJSQ/FSS4427DKO0RC8AlcEMhFdViRR1WDWR5t3WXVuL1d106kG9vdeye2g60+1FDyW0shIcXVpyroXt8I8dfd+NB1vioAdWnD3UF1+gD4UFc6CEKpagxXN43rwJLUHz7yX2c8zokt9uHlsPIhA4aRnnHJTLptIS6CNsY7iASpxUUMkReGpfbQW0vtN5pitvrsN28rwtBD0nc0+/Yft5XhaB6TuaXfsP28rwtA9J3NPv2H7eV4Wgek7mn37D9vK8LQPSdzT79h+3leFoHpO5pd+w/byvC0D0nc0u/Yft5XhaB6TuaXfsP28rwtA9J3NLv2H7eV4Wgek7ml37D9vK8LQPSdzS79h+3leFoHpO5p9+w/byvC0E9r7Reazy2HIYVPxkS/CUHVn26cosxyv2g7h89LYmZSXOenvLEQ1YaQ222RATcQCP8rSGqqA8S02W2pQ6FhMoAIlqCtsnwoCpdKClejI4i3Sgtb+GBxVuNBSFt1pV/RQefLjPyUDy4z8lA8uM/JQPLjPyUDy4z8lA8uM/JQPLjPyUDy4z8lA8uM/JQPLjPyUDy4z8lA8utJ/koJ7WCbBU/LQXOPAFq1koK8B0pag90CggtBBf6qB0UDooHRQOigdFA6KB0UDooHRQOigdFA6KB0UDooI0EaBQf//Z" title="Toggle Table of Contents" alt="Toggle Table of Contents" />
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<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">
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||
|
||
<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>
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||
|
||
|
||
<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.
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</p>
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