system/core/URI.php

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<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.1.6 or newer
 *
 * @package		CodeIgniter
 * @author		ExpressionEngine Dev Team
 * @copyright	Copyright (c) 2008 - 2011, EllisLab, Inc.
 * @license		http://codeigniter.com/user_guide/license.html
 * @link		http://codeigniter.com
 * @since		Version 1.0
 * @filesource
 */

// ------------------------------------------------------------------------

/**
 * URI Class
 *
 * Parses URIs and determines routing
 *
 * @package		CodeIgniter
 * @subpackage	Libraries
 * @category	URI
 * @author		ExpressionEngine Dev Team
 * @link		http://codeigniter.com/user_guide/libraries/uri.html
 */
class CI_URI {

	/**
	 * List of cached uri segments
	 *
	 * @var array
	 * @access public
	 */
	var	$keyval			= array();
	/**
	 * Current uri string
	 *
	 * @var string
	 * @access public
	 */
	var $uri_string;
	/**
	 * List of uri segments
	 *
	 * @var array
	 * @access public
	 */
	var $segments		= array();
	/**
	 * Re-indexed list of uri segments
	 * Starts at 1 instead of 0
	 *
	 * @var array
	 * @access public
	 */
	var $rsegments		= array();