644 lines
15 KiB
PHP
644 lines
15 KiB
PHP
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<?php
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP
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*
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* This content is released under the MIT License (MIT)
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*
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* Copyright (c) 2014 - 2019, British Columbia Institute of Technology
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @package CodeIgniter
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* @author EllisLab Dev Team
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* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
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* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
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* @license https://opensource.org/licenses/MIT MIT License
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* @link https://codeigniter.com
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* @since Version 1.0.0
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* @filesource
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*/
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defined('BASEPATH') OR exit('No direct script access allowed');
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/**
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* URI Class
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*
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* Parses URIs and determines routing
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*
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* @package CodeIgniter
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* @subpackage Libraries
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* @category URI
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* @author EllisLab Dev Team
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* @link https://codeigniter.com/user_guide/libraries/uri.html
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*/
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class CI_URI {
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/**
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* List of cached URI segments
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*
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* @var array
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*/
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public $keyval = array();
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/**
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* Current URI string
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*
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* @var string
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*/
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public $uri_string = '';
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/**
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* List of URI segments
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*
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* Starts at 1 instead of 0.
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*
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* @var array
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*/
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public $segments = array();
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/**
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* List of routed URI segments
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*
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* Starts at 1 instead of 0.
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*
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* @var array
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*/
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public $rsegments = array();
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/**
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* Permitted URI chars
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*
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* PCRE character group allowed in URI segments
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*
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* @var string
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*/
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protected $_permitted_uri_chars;
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/**
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* Class constructor
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*
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* @return void
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*/
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public function __construct()
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{
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$this->config =& load_class('Config', 'core');
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// If query strings are enabled, we don't need to parse any segments.
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// However, they don't make sense under CLI.
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if (is_cli() OR $this->config->item('enable_query_strings') !== TRUE)
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{
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$this->_permitted_uri_chars = $this->config->item('permitted_uri_chars');
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// If it's a CLI request, ignore the configuration
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if (is_cli())
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{
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$uri = $this->_parse_argv();
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}
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else
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{
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$protocol = $this->config->item('uri_protocol');
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empty($protocol) && $protocol = 'REQUEST_URI';
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switch ($protocol)
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{
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case 'AUTO': // For BC purposes only
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case 'REQUEST_URI':
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$uri = $this->_parse_request_uri();
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break;
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case 'QUERY_STRING':
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$uri = $this->_parse_query_string();
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break;
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case 'PATH_INFO':
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default:
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$uri = isset($_SERVER[$protocol])
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? $_SERVER[$protocol]
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: $this->_parse_request_uri();
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break;
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}
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}
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$this->_set_uri_string($uri);
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}
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log_message('info', 'URI Class Initialized');
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}
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// --------------------------------------------------------------------
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/**
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* Set URI String
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*
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* @param string $str
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* @return void
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*/
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protected function _set_uri_string($str)
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{
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// Filter out control characters and trim slashes
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$this->uri_string = trim(remove_invisible_characters($str, FALSE), '/');
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if ($this->uri_string !== '')
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{
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// Remove the URL suffix, if present
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if (($suffix = (string) $this->config->item('url_suffix')) !== '')
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{
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$slen = strlen($suffix);
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if (substr($this->uri_string, -$slen) === $suffix)
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{
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$this->uri_string = substr($this->uri_string, 0, -$slen);
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}
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}
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$this->segments[0] = NULL;
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// Populate the segments array
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foreach (explode('/', trim($this->uri_string, '/')) as $val)
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{
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$val = trim($val);
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// Filter segments for security
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$this->filter_uri($val);
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if ($val !== '')
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{
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$this->segments[] = $val;
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}
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}
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unset($this->segments[0]);
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}
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}
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// --------------------------------------------------------------------
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/**
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* Parse REQUEST_URI
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*
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* Will parse REQUEST_URI and automatically detect the URI from it,
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* while fixing the query string if necessary.
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*
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* @return string
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*/
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protected function _parse_request_uri()
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{
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if ( ! isset($_SERVER['REQUEST_URI'], $_SERVER['SCRIPT_NAME']))
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{
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return '';
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}
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// parse_url() returns false if no host is present, but the path or query string
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// contains a colon followed by a number
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$uri = parse_url('http://dummy'.$_SERVER['REQUEST_URI']);
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$query = isset($uri['query']) ? $uri['query'] : '';
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$uri = isset($uri['path']) ? $uri['path'] : '';
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if (isset($_SERVER['SCRIPT_NAME'][0]))
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{
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if (strpos($uri, $_SERVER['SCRIPT_NAME']) === 0)
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{
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$uri = (string) substr($uri, strlen($_SERVER['SCRIPT_NAME']));
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}
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elseif (strpos($uri, dirname($_SERVER['SCRIPT_NAME'])) === 0)
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{
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$uri = (string) substr($uri, strlen(dirname($_SERVER['SCRIPT_NAME'])));
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}
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}
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// This section ensures that even on servers that require the URI to be in the query string (Nginx) a correct
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// URI is found, and also fixes the QUERY_STRING server var and $_GET array.
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if (trim($uri, '/') === '' && strncmp($query, '/', 1) === 0)
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{
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$query = explode('?', $query, 2);
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$uri = $query[0];
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$_SERVER['QUERY_STRING'] = isset($query[1]) ? $query[1] : '';
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}
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else
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{
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$_SERVER['QUERY_STRING'] = $query;
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}
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parse_str($_SERVER['QUERY_STRING'], $_GET);
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if ($uri === '/' OR $uri === '')
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{
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return '/';
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}
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// Do some final cleaning of the URI and return it
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return $this->_remove_relative_directory($uri);
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}
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// --------------------------------------------------------------------
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/**
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* Parse QUERY_STRING
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*
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* Will parse QUERY_STRING and automatically detect the URI from it.
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*
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* @return string
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*/
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protected function _parse_query_string()
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{
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$uri = isset($_SERVER['QUERY_STRING']) ? $_SERVER['QUERY_STRING'] : @getenv('QUERY_STRING');
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if (trim($uri, '/') === '')
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{
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return '';
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}
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elseif (strncmp($uri, '/', 1) === 0)
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{
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$uri = explode('?', $uri, 2);
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$_SERVER['QUERY_STRING'] = isset($uri[1]) ? $uri[1] : '';
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$uri = $uri[0];
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}
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parse_str($_SERVER['QUERY_STRING'], $_GET);
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return $this->_remove_relative_directory($uri);
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}
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// --------------------------------------------------------------------
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/**
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* Parse CLI arguments
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*
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* Take each command line argument and assume it is a URI segment.
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*
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* @return string
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*/
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protected function _parse_argv()
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{
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$args = array_slice($_SERVER['argv'], 1);
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return $args ? implode('/', $args) : '';
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}
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// --------------------------------------------------------------------
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/**
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* Remove relative directory (../) and multi slashes (///)
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*
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* Do some final cleaning of the URI and return it, currently only used in self::_parse_request_uri()
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*
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* @param string $uri
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* @return string
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*/
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protected function _remove_relative_directory($uri)
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{
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$uris = array();
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$tok = strtok($uri, '/');
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while ($tok !== FALSE)
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{
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if (( ! empty($tok) OR $tok === '0') && $tok !== '..')
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{
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$uris[] = $tok;
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}
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$tok = strtok('/');
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}
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return implode('/', $uris);
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}
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// --------------------------------------------------------------------
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/**
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* Filter URI
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*
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* Filters segments for malicious characters.
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*
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* @param string $str
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* @return void
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*/
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public function filter_uri(&$str)
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{
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if ( ! empty($str) && ! empty($this->_permitted_uri_chars) && ! preg_match('/^['.$this->_permitted_uri_chars.']+$/i'.(UTF8_ENABLED ? 'u' : ''), $str))
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{
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show_error('The URI you submitted has disallowed characters.', 400);
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}
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}
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// --------------------------------------------------------------------
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/**
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* Fetch URI Segment
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*
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* @see CI_URI::$segments
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* @param int $n Index
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* @param mixed $no_result What to return if the segment index is not found
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* @return mixed
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*/
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public function segment($n, $no_result = NULL)
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{
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return isset($this->segments[$n]) ? $this->segments[$n] : $no_result;
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}
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// --------------------------------------------------------------------
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/**
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* Fetch URI "routed" Segment
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*
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* Returns the re-routed URI segment (assuming routing rules are used)
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* based on the index provided. If there is no routing, will return
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* the same result as CI_URI::segment().
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*
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* @see CI_URI::$rsegments
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* @see CI_URI::segment()
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* @param int $n Index
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* @param mixed $no_result What to return if the segment index is not found
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* @return mixed
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*/
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public function rsegment($n, $no_result = NULL)
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{
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return isset($this->rsegments[$n]) ? $this->rsegments[$n] : $no_result;
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}
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// --------------------------------------------------------------------
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/**
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* URI to assoc
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*
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* Generates an associative array of URI data starting at the supplied
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* segment index. For example, if this is your URI:
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*
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* example.com/user/search/name/joe/location/UK/gender/male
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*
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* You can use this method to generate an array with this prototype:
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*
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* array (
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* name => joe
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* location => UK
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* gender => male
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* )
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*
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* @param int $n Index (default: 3)
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* @param array $default Default values
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* @return array
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*/
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public function uri_to_assoc($n = 3, $default = array())
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{
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return $this->_uri_to_assoc($n, $default, 'segment');
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}
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// --------------------------------------------------------------------
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/**
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* Routed URI to assoc
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*
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* Identical to CI_URI::uri_to_assoc(), only it uses the re-routed
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* segment array.
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*
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* @see CI_URI::uri_to_assoc()
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* @param int $n Index (default: 3)
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* @param array $default Default values
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* @return array
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*/
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public function ruri_to_assoc($n = 3, $default = array())
|
||
|
|
{
|
||
|
|
return $this->_uri_to_assoc($n, $default, 'rsegment');
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Internal URI-to-assoc
|
||
|
|
*
|
||
|
|
* Generates a key/value pair from the URI string or re-routed URI string.
|
||
|
|
*
|
||
|
|
* @used-by CI_URI::uri_to_assoc()
|
||
|
|
* @used-by CI_URI::ruri_to_assoc()
|
||
|
|
* @param int $n Index (default: 3)
|
||
|
|
* @param array $default Default values
|
||
|
|
* @param string $which Array name ('segment' or 'rsegment')
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
protected function _uri_to_assoc($n = 3, $default = array(), $which = 'segment')
|
||
|
|
{
|
||
|
|
if ( ! is_numeric($n))
|
||
|
|
{
|
||
|
|
return $default;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isset($this->keyval[$which], $this->keyval[$which][$n]))
|
||
|
|
{
|
||
|
|
return $this->keyval[$which][$n];
|
||
|
|
}
|
||
|
|
|
||
|
|
$total_segments = "total_{$which}s";
|
||
|
|
$segment_array = "{$which}_array";
|
||
|
|
|
||
|
|
if ($this->$total_segments() < $n)
|
||
|
|
{
|
||
|
|
return (count($default) === 0)
|
||
|
|
? array()
|
||
|
|
: array_fill_keys($default, NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
$segments = array_slice($this->$segment_array(), ($n - 1));
|
||
|
|
$i = 0;
|
||
|
|
$lastval = '';
|
||
|
|
$retval = array();
|
||
|
|
foreach ($segments as $seg)
|
||
|
|
{
|
||
|
|
if ($i % 2)
|
||
|
|
{
|
||
|
|
$retval[$lastval] = $seg;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$retval[$seg] = NULL;
|
||
|
|
$lastval = $seg;
|
||
|
|
}
|
||
|
|
|
||
|
|
$i++;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (count($default) > 0)
|
||
|
|
{
|
||
|
|
foreach ($default as $val)
|
||
|
|
{
|
||
|
|
if ( ! array_key_exists($val, $retval))
|
||
|
|
{
|
||
|
|
$retval[$val] = NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Cache the array for reuse
|
||
|
|
isset($this->keyval[$which]) OR $this->keyval[$which] = array();
|
||
|
|
$this->keyval[$which][$n] = $retval;
|
||
|
|
return $retval;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Assoc to URI
|
||
|
|
*
|
||
|
|
* Generates a URI string from an associative array.
|
||
|
|
*
|
||
|
|
* @param array $array Input array of key/value pairs
|
||
|
|
* @return string URI string
|
||
|
|
*/
|
||
|
|
public function assoc_to_uri($array)
|
||
|
|
{
|
||
|
|
$temp = array();
|
||
|
|
foreach ((array) $array as $key => $val)
|
||
|
|
{
|
||
|
|
$temp[] = $key;
|
||
|
|
$temp[] = $val;
|
||
|
|
}
|
||
|
|
|
||
|
|
return implode('/', $temp);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Slash segment
|
||
|
|
*
|
||
|
|
* Fetches an URI segment with a slash.
|
||
|
|
*
|
||
|
|
* @param int $n Index
|
||
|
|
* @param string $where Where to add the slash ('trailing' or 'leading')
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
public function slash_segment($n, $where = 'trailing')
|
||
|
|
{
|
||
|
|
return $this->_slash_segment($n, $where, 'segment');
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Slash routed segment
|
||
|
|
*
|
||
|
|
* Fetches an URI routed segment with a slash.
|
||
|
|
*
|
||
|
|
* @param int $n Index
|
||
|
|
* @param string $where Where to add the slash ('trailing' or 'leading')
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
public function slash_rsegment($n, $where = 'trailing')
|
||
|
|
{
|
||
|
|
return $this->_slash_segment($n, $where, 'rsegment');
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Internal Slash segment
|
||
|
|
*
|
||
|
|
* Fetches an URI Segment and adds a slash to it.
|
||
|
|
*
|
||
|
|
* @used-by CI_URI::slash_segment()
|
||
|
|
* @used-by CI_URI::slash_rsegment()
|
||
|
|
*
|
||
|
|
* @param int $n Index
|
||
|
|
* @param string $where Where to add the slash ('trailing' or 'leading')
|
||
|
|
* @param string $which Array name ('segment' or 'rsegment')
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
protected function _slash_segment($n, $where = 'trailing', $which = 'segment')
|
||
|
|
{
|
||
|
|
$leading = $trailing = '/';
|
||
|
|
|
||
|
|
if ($where === 'trailing')
|
||
|
|
{
|
||
|
|
$leading = '';
|
||
|
|
}
|
||
|
|
elseif ($where === 'leading')
|
||
|
|
{
|
||
|
|
$trailing = '';
|
||
|
|
}
|
||
|
|
|
||
|
|
return $leading.$this->$which($n).$trailing;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Segment Array
|
||
|
|
*
|
||
|
|
* @return array CI_URI::$segments
|
||
|
|
*/
|
||
|
|
public function segment_array()
|
||
|
|
{
|
||
|
|
return $this->segments;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Routed Segment Array
|
||
|
|
*
|
||
|
|
* @return array CI_URI::$rsegments
|
||
|
|
*/
|
||
|
|
public function rsegment_array()
|
||
|
|
{
|
||
|
|
return $this->rsegments;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Total number of segments
|
||
|
|
*
|
||
|
|
* @return int
|
||
|
|
*/
|
||
|
|
public function total_segments()
|
||
|
|
{
|
||
|
|
return count($this->segments);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Total number of routed segments
|
||
|
|
*
|
||
|
|
* @return int
|
||
|
|
*/
|
||
|
|
public function total_rsegments()
|
||
|
|
{
|
||
|
|
return count($this->rsegments);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Fetch URI string
|
||
|
|
*
|
||
|
|
* @return string CI_URI::$uri_string
|
||
|
|
*/
|
||
|
|
public function uri_string()
|
||
|
|
{
|
||
|
|
return $this->uri_string;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Fetch Re-routed URI string
|
||
|
|
*
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
public function ruri_string()
|
||
|
|
{
|
||
|
|
return ltrim(load_class('Router', 'core')->directory, '/').implode('/', $this->rsegments);
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|