654 lines
14 KiB
PHP
654 lines
14 KiB
PHP
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<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
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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 5.1.6 or newer
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*
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* @package CodeIgniter
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* @author ExpressionEngine Dev Team
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* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
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* @license http://codeigniter.com/user_guide/license.html
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* @link http://codeigniter.com
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* @since Version 1.0
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* @filesource
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*/
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// ------------------------------------------------------------------------
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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 ExpressionEngine Dev Team
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* @link http://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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* @access public
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*/
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var $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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* @access public
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*/
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var $uri_string;
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/**
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* List of uri segments
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*
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* @var array
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* @access public
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*/
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var $segments = array();
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/**
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* Re-indexed list of uri segments
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* Starts at 1 instead of 0
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*
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* @var array
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* @access public
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*/
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var $rsegments = array();
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/**
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* Constructor
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*
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* Simply globalizes the $RTR object. The front
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* loads the Router class early on so it's not available
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* normally as other classes are.
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*
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* @access public
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*/
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function __construct()
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{
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$this->config =& load_class('Config', 'core');
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log_message('debug', "URI Class Initialized");
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}
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// --------------------------------------------------------------------
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/**
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* Get the URI String
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*
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* @access private
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* @return string
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*/
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function _fetch_uri_string()
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{
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if (strtoupper($this->config->item('uri_protocol')) == 'AUTO')
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{
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// Is the request coming from the command line?
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if (php_sapi_name() == 'cli' or defined('STDIN'))
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{
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$this->_set_uri_string($this->_parse_cli_args());
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return;
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}
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// Let's try the REQUEST_URI first, this will work in most situations
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if ($uri = $this->_detect_uri())
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{
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$this->_set_uri_string($uri);
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return;
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}
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// Is there a PATH_INFO variable?
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// Note: some servers seem to have trouble with getenv() so we'll test it two ways
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$path = (isset($_SERVER['PATH_INFO'])) ? $_SERVER['PATH_INFO'] : @getenv('PATH_INFO');
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if (trim($path, '/') != '' && $path != "/".SELF)
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{
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$this->_set_uri_string($path);
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return;
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}
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// No PATH_INFO?... What about QUERY_STRING?
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$path = (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : @getenv('QUERY_STRING');
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if (trim($path, '/') != '')
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{
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$this->_set_uri_string($path);
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return;
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}
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// As a last ditch effort lets try using the $_GET array
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if (is_array($_GET) && count($_GET) == 1 && trim(key($_GET), '/') != '')
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{
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$this->_set_uri_string(key($_GET));
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return;
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}
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// We've exhausted all our options...
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$this->uri_string = '';
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return;
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}
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$uri = strtoupper($this->config->item('uri_protocol'));
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if ($uri == 'REQUEST_URI')
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{
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$this->_set_uri_string($this->_detect_uri());
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return;
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}
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elseif ($uri == 'CLI')
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{
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$this->_set_uri_string($this->_parse_cli_args());
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return;
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}
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$path = (isset($_SERVER[$uri])) ? $_SERVER[$uri] : @getenv($uri);
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$this->_set_uri_string($path);
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}
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// --------------------------------------------------------------------
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/**
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* Set the URI String
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*
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* @access public
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* @param string
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* @return string
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*/
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function _set_uri_string($str)
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{
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// Filter out control characters
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$str = remove_invisible_characters($str, FALSE);
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// If the URI contains only a slash we'll kill it
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$this->uri_string = ($str == '/') ? '' : $str;
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}
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// --------------------------------------------------------------------
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/**
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* Detects the URI
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*
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* This function will detect the URI automatically and fix the query string
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* if necessary.
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*
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* @access private
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* @return string
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*/
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private function _detect_uri()
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{
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if ( ! isset($_SERVER['REQUEST_URI']) OR ! isset($_SERVER['SCRIPT_NAME']))
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{
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return '';
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}
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$uri = $_SERVER['REQUEST_URI'];
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if (strpos($uri, $_SERVER['SCRIPT_NAME']) === 0)
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{
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$uri = 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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$uri = substr($uri, strlen(dirname($_SERVER['SCRIPT_NAME'])));
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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 $_GET array.
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if (strncmp($uri, '?/', 2) === 0)
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{
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$uri = substr($uri, 2);
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}
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$parts = preg_split('#\?#i', $uri, 2);
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$uri = $parts[0];
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if (isset($parts[1]))
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{
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$_SERVER['QUERY_STRING'] = $parts[1];
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parse_str($_SERVER['QUERY_STRING'], $_GET);
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}
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else
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{
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$_SERVER['QUERY_STRING'] = '';
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$_GET = array();
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}
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if ($uri == '/' || empty($uri))
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{
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return '/';
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}
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$uri = parse_url($uri, PHP_URL_PATH);
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// Do some final cleaning of the URI and return it
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return str_replace(array('//', '../'), '/', trim($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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* @access private
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* @return string
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*/
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private function _parse_cli_args()
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{
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$args = array_slice($_SERVER['argv'], 1);
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return $args ? '/' . implode('/', $args) : '';
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}
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// --------------------------------------------------------------------
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/**
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* Filter segments for malicious characters
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*
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* @access private
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* @param string
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* @return string
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*/
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function _filter_uri($str)
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{
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if ($str != '' && $this->config->item('permitted_uri_chars') != '' && $this->config->item('enable_query_strings') == FALSE)
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{
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// preg_quote() in PHP 5.3 escapes -, so the str_replace() and addition of - to preg_quote() is to maintain backwards
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// compatibility as many are unaware of how characters in the permitted_uri_chars will be parsed as a regex pattern
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if ( ! preg_match("|^[".str_replace(array('\\-', '\-'), '-', preg_quote($this->config->item('permitted_uri_chars'), '-'))."]+$|i", $str))
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{
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show_error('The URI you submitted has disallowed characters.', 400);
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}
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}
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// Convert programatic characters to entities
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$bad = array('$', '(', ')', '%28', '%29');
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$good = array('$', '(', ')', '(', ')');
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return str_replace($bad, $good, $str);
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}
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// --------------------------------------------------------------------
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/**
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* Remove the suffix from the URL if needed
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*
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* @access private
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* @return void
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*/
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function _remove_url_suffix()
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{
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if ($this->config->item('url_suffix') != "")
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{
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$this->uri_string = preg_replace("|".preg_quote($this->config->item('url_suffix'))."$|", "", $this->uri_string);
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}
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}
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// --------------------------------------------------------------------
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/**
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* Explode the URI Segments. The individual segments will
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* be stored in the $this->segments array.
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*
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* @access private
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* @return void
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*/
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function _explode_segments()
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{
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foreach (explode("/", preg_replace("|/*(.+?)/*$|", "\\1", $this->uri_string)) as $val)
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{
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// Filter segments for security
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$val = trim($this->_filter_uri($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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}
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// --------------------------------------------------------------------
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/**
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* Re-index Segments
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*
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* This function re-indexes the $this->segment array so that it
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* starts at 1 rather than 0. Doing so makes it simpler to
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* use functions like $this->uri->segment(n) since there is
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* a 1:1 relationship between the segment array and the actual segments.
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*
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* @access private
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* @return void
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*/
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function _reindex_segments()
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{
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array_unshift($this->segments, NULL);
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array_unshift($this->rsegments, NULL);
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unset($this->segments[0]);
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unset($this->rsegments[0]);
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}
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// --------------------------------------------------------------------
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/**
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* Fetch a URI Segment
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*
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* This function returns the URI segment based on the number provided.
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*
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* @access public
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* @param integer
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* @param bool
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* @return string
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*/
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function segment($n, $no_result = FALSE)
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{
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return ( ! isset($this->segments[$n])) ? $no_result : $this->segments[$n];
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}
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// --------------------------------------------------------------------
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/**
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* Fetch a URI "routed" Segment
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*
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* This function returns the re-routed URI segment (assuming routing rules are used)
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* based on the number provided. If there is no routing this function returns the
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* same result as $this->segment()
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*
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* @access public
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* @param integer
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* @param bool
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* @return string
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*/
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function rsegment($n, $no_result = FALSE)
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{
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return ( ! isset($this->rsegments[$n])) ? $no_result : $this->rsegments[$n];
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}
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// --------------------------------------------------------------------
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/**
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* Generate a key value pair from the URI string
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*
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* This function generates and associative array of URI data starting
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* at the supplied segment. 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 function 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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* @access public
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* @param integer the starting segment number
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* @param array an array of default values
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* @return array
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*/
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function uri_to_assoc($n = 3, $default = array())
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{
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return $this->_uri_to_assoc($n, $default, 'segment');
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}
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/**
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* Identical to above only it uses the re-routed segment array
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*
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* @access public
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* @param integer the starting segment number
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* @param array an array of default values
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* @return array
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*
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*/
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function ruri_to_assoc($n = 3, $default = array())
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{
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return $this->_uri_to_assoc($n, $default, 'rsegment');
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}
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// --------------------------------------------------------------------
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/**
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* Generate a key value pair from the URI string or Re-routed URI string
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*
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* @access private
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||
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* @param integer the starting segment number
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* @param array an array of default values
|
||
|
|
* @param string which array we should use
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
function _uri_to_assoc($n = 3, $default = array(), $which = 'segment')
|
||
|
|
{
|
||
|
|
if ($which == 'segment')
|
||
|
|
{
|
||
|
|
$total_segments = 'total_segments';
|
||
|
|
$segment_array = 'segment_array';
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$total_segments = 'total_rsegments';
|
||
|
|
$segment_array = 'rsegment_array';
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( ! is_numeric($n))
|
||
|
|
{
|
||
|
|
return $default;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isset($this->keyval[$n]))
|
||
|
|
{
|
||
|
|
return $this->keyval[$n];
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($this->$total_segments() < $n)
|
||
|
|
{
|
||
|
|
if (count($default) == 0)
|
||
|
|
{
|
||
|
|
return array();
|
||
|
|
}
|
||
|
|
|
||
|
|
$retval = array();
|
||
|
|
foreach ($default as $val)
|
||
|
|
{
|
||
|
|
$retval[$val] = FALSE;
|
||
|
|
}
|
||
|
|
return $retval;
|
||
|
|
}
|
||
|
|
|
||
|
|
$segments = array_slice($this->$segment_array(), ($n - 1));
|
||
|
|
|
||
|
|
$i = 0;
|
||
|
|
$lastval = '';
|
||
|
|
$retval = array();
|
||
|
|
foreach ($segments as $seg)
|
||
|
|
{
|
||
|
|
if ($i % 2)
|
||
|
|
{
|
||
|
|
$retval[$lastval] = $seg;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$retval[$seg] = FALSE;
|
||
|
|
$lastval = $seg;
|
||
|
|
}
|
||
|
|
|
||
|
|
$i++;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (count($default) > 0)
|
||
|
|
{
|
||
|
|
foreach ($default as $val)
|
||
|
|
{
|
||
|
|
if ( ! array_key_exists($val, $retval))
|
||
|
|
{
|
||
|
|
$retval[$val] = FALSE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Cache the array for reuse
|
||
|
|
$this->keyval[$n] = $retval;
|
||
|
|
return $retval;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Generate a URI string from an associative array
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @param array an associative array of key/values
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
function assoc_to_uri($array)
|
||
|
|
{
|
||
|
|
$temp = array();
|
||
|
|
foreach ((array)$array as $key => $val)
|
||
|
|
{
|
||
|
|
$temp[] = $key;
|
||
|
|
$temp[] = $val;
|
||
|
|
}
|
||
|
|
|
||
|
|
return implode('/', $temp);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Fetch a URI Segment and add a trailing slash
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @param integer
|
||
|
|
* @param string
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
function slash_segment($n, $where = 'trailing')
|
||
|
|
{
|
||
|
|
return $this->_slash_segment($n, $where, 'segment');
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Fetch a URI Segment and add a trailing slash
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @param integer
|
||
|
|
* @param string
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
function slash_rsegment($n, $where = 'trailing')
|
||
|
|
{
|
||
|
|
return $this->_slash_segment($n, $where, 'rsegment');
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Fetch a URI Segment and add a trailing slash - helper function
|
||
|
|
*
|
||
|
|
* @access private
|
||
|
|
* @param integer
|
||
|
|
* @param string
|
||
|
|
* @param string
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
function _slash_segment($n, $where = 'trailing', $which = 'segment')
|
||
|
|
{
|
||
|
|
$leading = '/';
|
||
|
|
$trailing = '/';
|
||
|
|
|
||
|
|
if ($where == 'trailing')
|
||
|
|
{
|
||
|
|
$leading = '';
|
||
|
|
}
|
||
|
|
elseif ($where == 'leading')
|
||
|
|
{
|
||
|
|
$trailing = '';
|
||
|
|
}
|
||
|
|
|
||
|
|
return $leading.$this->$which($n).$trailing;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Segment Array
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
function segment_array()
|
||
|
|
{
|
||
|
|
return $this->segments;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Routed Segment Array
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
function rsegment_array()
|
||
|
|
{
|
||
|
|
return $this->rsegments;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Total number of segments
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @return integer
|
||
|
|
*/
|
||
|
|
function total_segments()
|
||
|
|
{
|
||
|
|
return count($this->segments);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Total number of routed segments
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @return integer
|
||
|
|
*/
|
||
|
|
function total_rsegments()
|
||
|
|
{
|
||
|
|
return count($this->rsegments);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Fetch the entire URI string
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
function uri_string()
|
||
|
|
{
|
||
|
|
return $this->uri_string;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Fetch the entire Re-routed URI string
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
function ruri_string()
|
||
|
|
{
|
||
|
|
return '/'.implode('/', $this->rsegment_array());
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
// END URI Class
|
||
|
|
|
||
|
|
/* End of file URI.php */
|
||
|
|
/* Location: ./system/core/URI.php */
|