Merge branch 'release/2.1.0'

Conflicts:
	user_guide/helpers/url_helper.html

15 files changed, 567 insertions, 155 deletions

diff --git a/system/core/Benchmark.php b/system/core/Benchmark.php
index 515550e9f..a200727ab 100644..100755
--- a/system/core/Benchmark.php
+++ b/system/core/Benchmark.php
@@ -29,6 +29,11 @@
  */
 class CI_Benchmark {
 
+	/**
+	 * List of all benchmark markers and when they were added
+	 *
+	 * @var array
+	 */
 	var $marker = array();
 
 	// --------------------------------------------------------------------
diff --git a/system/core/CodeIgniter.php b/system/core/CodeIgniter.php
index 94fecb5c0..db1aee574 100644..100755
--- a/system/core/CodeIgniter.php
+++ b/system/core/CodeIgniter.php
@@ -27,17 +27,19 @@
  * @link		http://codeigniter.com/user_guide/
  */
 
-/*
- * ------------------------------------------------------
- *  Define the CodeIgniter Version
- * ------------------------------------------------------
+/**
+ * CodeIgniter Version
+ *
+ * @var string
+ *
  */
-	define('CI_VERSION', '2.0.3');
+	define('CI_VERSION', '2.1.0');
 
-/*
- * ------------------------------------------------------
- *  Define the CodeIgniter Branch (Core = TRUE, Reactor = FALSE)
- * ------------------------------------------------------
+/**
+ * CodeIgniter Branch (Core = TRUE, Reactor = FALSE)
+ *
+ * @var boolean
+ *
  */
 	define('CI_CORE', FALSE);
 
@@ -267,7 +269,25 @@
 		OR in_array(strtolower($method), array_map('strtolower', get_class_methods('CI_Controller')))
 		)
 	{
-		show_404("{$class}/{$method}");
+		if ( ! empty($RTR->routes['404_override']))
+		{
+			$x = explode('/', $RTR->routes['404_override']);
+			$class = $x[0];
+			$method = (isset($x[1]) ? $x[1] : 'index');
+			if ( ! class_exists($class))
+			{
+				if ( ! file_exists(APPPATH.'controllers/'.$class.'.php'))
+				{
+					show_404("{$class}/{$method}");
+				}
+
+				include_once(APPPATH.'controllers/'.$class.'.php');
+			}
+		}
+		else
+		{
+			show_404("{$class}/{$method}");
+		}
 	}
 
 /*
diff --git a/system/core/Common.php b/system/core/Common.php
index db9fbeb9f..d79375475 100644
--- a/system/core/Common.php
+++ b/system/core/Common.php
@@ -132,9 +132,9 @@ if ( ! function_exists('load_class'))
 
 		$name = FALSE;
 
-		// Look for the class first in the native system/libraries folder
-		// thenin the local application/libraries folder
-		foreach (array(BASEPATH, APPPATH) as $path)
+		// Look for the class first in the local application/libraries folder
+		// then in the native system/libraries folder
+		foreach (array(APPPATH, BASEPATH) as $path)
 		{
 			if (file_exists($path.$directory.'/'.$class.'.php'))
 			{
@@ -536,5 +536,29 @@ if ( ! function_exists('remove_invisible_characters'))
 	}
 }
 
+// ------------------------------------------------------------------------
+
+/**
+* Returns HTML escaped variable
+*
+* @access	public
+* @param	mixed
+* @return	mixed
+*/
+if ( ! function_exists('html_escape'))
+{
+	function html_escape($var)
+	{
+		if (is_array($var))
+		{
+			return array_map('html_escape', $var);
+		}
+		else
+		{
+			return htmlspecialchars($var, ENT_QUOTES, config_item('charset'));
+		}
+	}
+}
+
 /* End of file Common.php */
 /* Location: ./system/core/Common.php */
\ No newline at end of file
diff --git a/system/core/Config.php b/system/core/Config.php
index 0e6f10e07..714c4667b 100644..100755
--- a/system/core/Config.php
+++ b/system/core/Config.php
@@ -28,8 +28,23 @@
  */
 class CI_Config {
 
+	/**
+	 * List of all loaded config values
+	 *
+	 * @var array
+	 */
 	var $config = array();
+	/**
+	 * List of all loaded config files
+	 *
+	 * @var array
+	 */
 	var $is_loaded = array();
+	/**
+	 * List of paths to search when trying to load a config file
+	 *
+	 * @var array
+	 */
 	var $_config_paths = array(APPPATH);
 
 	/**
@@ -251,13 +266,13 @@ class CI_Config {
 			return $this->slash_item('base_url').$this->item('index_page').'?'.$this->_uri_string($uri);
 		}
 	}
-	
+
 	// -------------------------------------------------------------
-	
+
 	/**
 	 * Base URL
 	 * Returns base_url [. uri_string]
-	 * 
+	 *
 	 * @access public
 	 * @param string $uri
 	 * @return string
@@ -266,12 +281,12 @@ class CI_Config {
 	{
 		return $this->slash_item('base_url').ltrim($this->_uri_string($uri),'/');
 	}
-	
+
 	// -------------------------------------------------------------
-	
+
 	/**
 	 * Build URI string for use in Config::site_url() and Config::base_url()
-	 * 
+	 *
 	 * @access protected
 	 * @param  $uri
 	 * @return string
@@ -305,7 +320,7 @@ class CI_Config {
 	}
 
 	// --------------------------------------------------------------------
-	
+
 	/**
 	 * System URL
 	 *
diff --git a/system/core/Controller.php b/system/core/Controller.php
index ec86b7920..fddb81e19 100644
--- a/system/core/Controller.php
+++ b/system/core/Controller.php
@@ -48,7 +48,7 @@ class CI_Controller {
 
 		$this->load =& load_class('Loader', 'core');
 
-		$this->load->set_base_classes()->ci_autoloader();
+		$this->load->initialize();
 		
 		log_message('debug', "Controller Class Initialized");
 	}
diff --git a/system/core/Exceptions.php b/system/core/Exceptions.php
index bff86a92f..869739a5a 100644..100755
--- a/system/core/Exceptions.php
+++ b/system/core/Exceptions.php
@@ -30,8 +30,21 @@ class CI_Exceptions {
 	var $message;
 	var $filename;
 	var $line;
+
+	/**
+	 * Nesting level of the output buffering mechanism
+	 *
+	 * @var int
+	 * @access public
+	 */
 	var $ob_level;
 
+	/**
+	 * List if available error levels
+	 *
+	 * @var array
+	 * @access public
+	 */
 	var $levels = array(
 						E_ERROR				=>	'Error',
 						E_WARNING			=>	'Warning',
@@ -84,7 +97,8 @@ class CI_Exceptions {
 	 * 404 Page Not Found Handler
 	 *
 	 * @access	private
-	 * @param	string
+	 * @param	string	the page
+	 * @param 	bool	log error yes/no
 	 * @return	string
 	 */
 	function show_404($page = '', $log_error = TRUE)
@@ -115,6 +129,7 @@ class CI_Exceptions {
 	 * @param	string	the heading
 	 * @param	string	the message
 	 * @param	string	the template name
+	 * @param 	int		the status code
 	 * @return	string
 	 */
 	function show_error($heading, $message, $template = 'error_general', $status_code = 500)
diff --git a/system/core/Hooks.php b/system/core/Hooks.php
index fd6380f0a..33f1c034c 100644..100755
--- a/system/core/Hooks.php
+++ b/system/core/Hooks.php
@@ -28,8 +28,23 @@
  */
 class CI_Hooks {
 
+	/**
+	 * Determines wether hooks are enabled
+	 *
+	 * @var bool
+	 */
 	var $enabled		= FALSE;
+	/**
+	 * List of all hooks set in config/hooks.php
+	 *
+	 * @var array
+	 */
 	var $hooks			= array();
+	/**
+	 * Determines wether hook is in progress, used to prevent infinte loops
+	 *
+	 * @var bool
+	 */
 	var $in_progress	= FALSE;
 
 	/**
diff --git a/system/core/Input.php b/system/core/Input.php
index cfbef942d..9bfb5f1fb 100644..100755
--- a/system/core/Input.php
+++ b/system/core/Input.php
@@ -28,15 +28,51 @@
  */
 class CI_Input {
 
+	/**
+	 * IP address of the current user
+	 *
+	 * @var string
+	 */
 	var $ip_address				= FALSE;
+	/**
+	 * user agent (web browser) being used by the current user
+	 *
+	 * @var string
+	 */
 	var $user_agent				= FALSE;
+	/**
+	 * If FALSE, then $_GET will be set to an empty array
+	 *
+	 * @var bool
+	 */
 	var $_allow_get_array		= TRUE;
+	/**
+	 * If TRUE, then newlines are standardized
+	 *
+	 * @var bool
+	 */
 	var $_standardize_newlines	= TRUE;
-	var $_enable_xss			= FALSE; // Set automatically based on config setting
-	var $_enable_csrf			= FALSE; // Set automatically based on config setting
-
+	/**
+	 * Determines whether the XSS filter is always active when GET, POST or COOKIE data is encountered
+	 * Set automatically based on config setting
+	 *
+	 * @var bool
+	 */
+	var $_enable_xss			= FALSE;
+	/**
+	 * Enables a CSRF cookie token to be set.
+	 * Set automatically based on config setting
+	 *
+	 * @var bool
+	 */
+	var $_enable_csrf			= FALSE;
+	/**
+	 * List of all HTTP request headers
+	 *
+	 * @var array
+	 */
 	protected $headers			= array();
-	
+
 
 	/**
 	 * Constructor
@@ -147,7 +183,7 @@ class CI_Input {
 			}
 			return $post;
 		}
-		
+
 		return $this->_fetch_from_array($_POST, $index, $xss_clean);
 	}
 
@@ -402,9 +438,9 @@ class CI_Input {
 	function _sanitize_globals()
 	{
 		// It would be "wrong" to unset any of these GLOBALS.
-		$protected = array('_SERVER', '_GET', '_POST', '_FILES', '_REQUEST', 
+		$protected = array('_SERVER', '_GET', '_POST', '_FILES', '_REQUEST',
 							'_SESSION', '_ENV', 'GLOBALS', 'HTTP_RAW_POST_DATA',
-							'system_folder', 'application_folder', 'BM', 'EXT', 
+							'system_folder', 'application_folder', 'BM', 'EXT',
 							'CFG', 'URI', 'RTR', 'OUT', 'IN');
 
 		// Unset globals for securiy.
@@ -512,8 +548,12 @@ class CI_Input {
 			return $new_array;
 		}
 
-		// We strip slashes if magic quotes is on to keep things consistent
-		if (function_exists('get_magic_quotes_gpc') AND get_magic_quotes_gpc())
+		/* We strip slashes if magic quotes is on to keep things consistent
+
+		   NOTE: In PHP 5.4 get_magic_quotes_gpc() will always return 0 and
+			 it will probably not exist in future versions at all.
+		*/
+		if ( ! is_php('5.4') && get_magic_quotes_gpc())
 		{
 			$str = stripslashes($str);
 		}
@@ -523,7 +563,7 @@ class CI_Input {
 		{
 			$str = $this->uni->clean_string($str);
 		}
-		
+
 		// Remove control characters
 		$str = remove_invisible_characters($str);
 
@@ -579,9 +619,11 @@ class CI_Input {
 	/**
 	 * Request Headers
 	 *
-	 * In Apache, you can simply call apache_request_headers(), however for 
+	 * In Apache, you can simply call apache_request_headers(), however for
 	 * people running other webservers the function is undefined.
 	 *
+	 * @param	bool XSS cleaning
+	 *
 	 * @return array
 	 */
 	public function request_headers($xss_clean = FALSE)
@@ -609,10 +651,10 @@ class CI_Input {
 		{
 			$key = str_replace('_', ' ', strtolower($key));
 			$key = str_replace(' ', '-', ucwords($key));
-			
+
 			$this->headers[$key] = $val;
 		}
-		
+
 		return $this->headers;
 	}
 
@@ -633,7 +675,7 @@ class CI_Input {
 		{
 			$this->request_headers();
 		}
-		
+
 		if ( ! isset($this->headers[$index]))
 		{
 			return FALSE;
@@ -644,7 +686,7 @@ class CI_Input {
 			return $this->security->xss_clean($this->headers[$index]);
 		}
 
-		return $this->headers[$index];		
+		return $this->headers[$index];
 	}
 
 	// --------------------------------------------------------------------
@@ -676,7 +718,6 @@ class CI_Input {
 	}
 
 }
-// END Input class
 
 /* End of file Input.php */
-/* Location: ./system/core/Input.php */
+/* Location: ./system/core/Input.php */
\ No newline at end of file
diff --git a/system/core/Lang.php b/system/core/Lang.php
index 170e6c725..5ac671838 100644..100755
--- a/system/core/Lang.php
+++ b/system/core/Lang.php
@@ -26,7 +26,17 @@
  */
 class CI_Lang {
 
+	/**
+	 * List of translations
+	 *
+	 * @var array
+	 */
 	var $language	= array();
+	/**
+	 * List of loaded language files
+	 *
+	 * @var array
+	 */
 	var $is_loaded	= array();
 
 	/**
@@ -47,6 +57,9 @@ class CI_Lang {
 	 * @access	public
 	 * @param	mixed	the name of the language file to be loaded. Can be an array
 	 * @param	string	the language (english, etc.)
+	 * @param	bool	return loaded array of translations
+	 * @param 	bool	add suffix to $langfile
+	 * @param 	string	alternative path to look for language file
 	 * @return	mixed
 	 */
 	function load($langfile = '', $idiom = '', $return = FALSE, $add_suffix = TRUE, $alt_path = '')
diff --git a/system/core/Loader.php b/system/core/Loader.php
index 7c8b298ac..6b7ee0c28 100644
--- a/system/core/Loader.php
+++ b/system/core/Loader.php
@@ -29,18 +29,91 @@
 class CI_Loader {
 
 	// All these are set automatically. Don't mess with them.
+	/**
+	 * Nesting level of the output buffering mechanism
+	 *
+	 * @var int
+	 * @access protected
+	 */
 	protected $_ci_ob_level;
+	/**
+	 * List of paths to load views from
+	 *
+	 * @var array
+	 * @access protected
+	 */
 	protected $_ci_view_paths		= array();
+	/**
+	 * List of paths to load libraries from
+	 *
+	 * @var array
+	 * @access protected
+	 */
 	protected $_ci_library_paths	= array();
+	/**
+	 * List of paths to load models from
+	 *
+	 * @var array
+	 * @access protected
+	 */
 	protected $_ci_model_paths		= array();
+	/**
+	 * List of paths to load helpers from
+	 *
+	 * @var array
+	 * @access protected
+	 */
 	protected $_ci_helper_paths		= array();
+	/**
+	 * List of loaded base classes
+	 * Set by the controller class
+	 *
+	 * @var array
+	 * @access protected
+	 */
 	protected $_base_classes		= array(); // Set by the controller class
+	/**
+	 * List of cached variables
+	 *
+	 * @var array
+	 * @access protected
+	 */
 	protected $_ci_cached_vars		= array();
+	/**
+	 * List of loaded classes
+	 *
+	 * @var array
+	 * @access protected
+	 */
 	protected $_ci_classes			= array();
+	/**
+	 * List of loaded files
+	 *
+	 * @var array
+	 * @access protected
+	 */
 	protected $_ci_loaded_files		= array();
+	/**
+	 * List of loaded models
+	 *
+	 * @var array
+	 * @access protected
+	 */
 	protected $_ci_models			= array();
+	/**
+	 * List of loaded helpers
+	 *
+	 * @var array
+	 * @access protected
+	 */
 	protected $_ci_helpers			= array();
-	protected $_ci_varmap			= array('unit_test' => 'unit', 
+	/**
+	 * List of class name mappings
+	 *
+	 * @var array
+	 * @access protected
+	 */
+	protected $_ci_varmap			= array('unit_test' => 'unit',
 											'user_agent' => 'agent');
 
 	/**
@@ -55,24 +128,29 @@ class CI_Loader {
 		$this->_ci_helper_paths = array(APPPATH, BASEPATH);
 		$this->_ci_model_paths = array(APPPATH);
 		$this->_ci_view_paths = array(APPPATH.'views/'	=> TRUE);
-		
+
 		log_message('debug', "Loader Class Initialized");
 	}
 
 	// --------------------------------------------------------------------
-	
+
 	/**
-	 * Set _base_classes variable
+	 * Initialize the Loader
 	 *
 	 * This method is called once in CI_Controller.
 	 *
-	 * @param 	array 	
+	 * @param 	array
 	 * @return 	object
 	 */
-	public function set_base_classes()
+	public function initialize()
 	{
+		$this->_ci_classes = array();
+		$this->_ci_loaded_files = array();
+		$this->_ci_models = array();
 		$this->_base_classes =& is_loaded();
-		
+
+		$this->_ci_autoloader();
+
 		return $this;
 	}
 
@@ -96,7 +174,7 @@ class CI_Loader {
 		{
 			return $this->_ci_classes[$class];
 		}
-				
+
 		return FALSE;
 	}
 
@@ -366,6 +444,7 @@ class CI_Loader {
 	 * the controller class and its "view" files.
 	 *
 	 * @param	array
+	 * @param 	string
 	 * @return	void
 	 */
 	public function vars($vars = array(), $val = '')
@@ -507,6 +586,8 @@ class CI_Loader {
 	 * Loads a config file
 	 *
 	 * @param	string
+	 * @param	bool
+	 * @param 	bool
 	 * @return	void
 	 */
 	public function config($file = '', $use_sections = FALSE, $fail_gracefully = FALSE)
@@ -535,6 +616,11 @@ class CI_Loader {
 			require BASEPATH.'libraries/Driver.php';
 		}
 
+		if ($library == '')
+		{
+			return FALSE;
+		}
+
 		// We can save the loader some time since Drivers will *always* be in a subfolder,
 		// and typically identically named to the library
 		if ( ! strpos($library, '/'))
@@ -553,13 +639,13 @@ class CI_Loader {
 	 * Prepends a parent path to the library, model, helper, and config path arrays
 	 *
 	 * @param	string
-	 * @param 	boolean 	
+	 * @param 	boolean
 	 * @return	void
 	 */
 	public function add_package_path($path, $view_cascade=TRUE)
 	{
 		$path = rtrim($path, '/').'/';
-		
+
 		array_unshift($this->_ci_library_paths, $path);
 		array_unshift($this->_ci_model_paths, $path);
 		array_unshift($this->_ci_helper_paths, $path);
@@ -595,6 +681,7 @@ class CI_Loader {
 	 * If no path is provided, the most recently added path is removed.
 	 *
 	 * @param	type
+	 * @param 	bool
 	 * @return	type
 	 */
 	public function remove_package_path($path = '', $remove_config_path = TRUE)
@@ -619,7 +706,7 @@ class CI_Loader {
 					unset($this->{$var}[$key]);
 				}
 			}
-			
+
 			if (isset($this->_ci_view_paths[$path.'views/']))
 			{
 				unset($this->_ci_view_paths[$path.'views/']);
@@ -658,7 +745,7 @@ class CI_Loader {
 		{
 			$$_ci_val = ( ! isset($_ci_data[$_ci_val])) ? FALSE : $_ci_data[$_ci_val];
 		}
-		
+
 		$file_exists = FALSE;
 
 		// Set the path to the requested file
@@ -680,11 +767,11 @@ class CI_Loader {
 					$file_exists = TRUE;
 					break;
 				}
-				
+
 				if ( ! $cascade)
 				{
 					break;
-				}				
+				}
 			}
 		}
 
@@ -913,6 +1000,7 @@ class CI_Loader {
 	 *
 	 * @param	string
 	 * @param	string
+	 * @param	bool
 	 * @param	string	an optional object name
 	 * @return	null
 	 */
@@ -935,22 +1023,22 @@ class CI_Loader {
 					// first, global next
 					if (defined('ENVIRONMENT') AND file_exists($path .'config/'.ENVIRONMENT.'/'.strtolower($class).'.php'))
 					{
-						include_once($path .'config/'.ENVIRONMENT.'/'.strtolower($class).'.php');
+						include($path .'config/'.ENVIRONMENT.'/'.strtolower($class).'.php');
 						break;
 					}
 					elseif (defined('ENVIRONMENT') AND file_exists($path .'config/'.ENVIRONMENT.'/'.ucfirst(strtolower($class)).'.php'))
 					{
-						include_once($path .'config/'.ENVIRONMENT.'/'.ucfirst(strtolower($class)).'.php');
+						include($path .'config/'.ENVIRONMENT.'/'.ucfirst(strtolower($class)).'.php');
 						break;
 					}
 					elseif (file_exists($path .'config/'.strtolower($class).'.php'))
 					{
-						include_once($path .'config/'.strtolower($class).'.php');
+						include($path .'config/'.strtolower($class).'.php');
 						break;
 					}
 					elseif (file_exists($path .'config/'.ucfirst(strtolower($class)).'.php'))
 					{
-						include_once($path .'config/'.ucfirst(strtolower($class)).'.php');
+						include($path .'config/'.ucfirst(strtolower($class)).'.php');
 						break;
 					}
 				}
@@ -1020,23 +1108,19 @@ class CI_Loader {
 	 * The config/autoload.php file contains an array that permits sub-systems,
 	 * libraries, and helpers to be loaded automatically.
 	 *
-	 * This function is public, as it's used in the CI_Controller class.  
-	 * However, there is no reason you should ever needs to use it.
-	 *
 	 * @param	array
 	 * @return	void
 	 */
-	public function ci_autoloader()
+	private function _ci_autoloader()
 	{
 		if (defined('ENVIRONMENT') AND file_exists(APPPATH.'config/'.ENVIRONMENT.'/autoload.php'))
 		{
-			include_once(APPPATH.'config/'.ENVIRONMENT.'/autoload.php');
+			include(APPPATH.'config/'.ENVIRONMENT.'/autoload.php');
 		}
 		else
 		{
-			include_once(APPPATH.'config/autoload.php');
+			include(APPPATH.'config/autoload.php');
 		}
-		
 
 		if ( ! isset($autoload))
 		{
@@ -1122,6 +1206,7 @@ class CI_Loader {
 	/**
 	 * Get a reference to a specific library or model
 	 *
+	 * @param 	string
 	 * @return	bool
 	 */
 	protected function &_ci_get_component($component)
@@ -1138,6 +1223,7 @@ class CI_Loader {
 	 * This function preps the name of various items to make loading them more reliable.
 	 *
 	 * @param	mixed
+	 * @param 	string
 	 * @return	array
 	 */
 	protected function _ci_prep_filename($filename, $extension)
diff --git a/system/core/Model.php b/system/core/Model.php
index 8566a0b66..e15ffbebc 100644..100755
--- a/system/core/Model.php
+++ b/system/core/Model.php
@@ -42,6 +42,7 @@ class CI_Model {
 	 * Allows models to access CI's loaded classes using the same
 	 * syntax as controllers.
 	 *
+	 * @param	string
 	 * @access private
 	 */
 	function __get($key)
diff --git a/system/core/Output.php b/system/core/Output.php
index 05ace919c..ccecafd2b 100644..100755
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -28,15 +28,67 @@
  */
 class CI_Output {
 
+	/**
+	 * Current output string
+	 *
+	 * @var string
+	 * @access 	protected
+	 */
 	protected $final_output;
+	/**
+	 * Cache expiration time
+	 *
+	 * @var int
+	 * @access 	protected
+	 */
 	protected $cache_expiration	= 0;
+	/**
+	 * List of server headers
+	 *
+	 * @var array
+	 * @access 	protected
+	 */
 	protected $headers			= array();
-	protected $mime_types			= array();
+	/**
+	 * List of mime types
+	 *
+	 * @var array
+	 * @access 	protected
+	 */
+	protected $mime_types		= array();
+	/**
+	 * Determines wether profiler is enabled
+	 *
+	 * @var book
+	 * @access 	protected
+	 */
 	protected $enable_profiler	= FALSE;
+	/**
+	 * Determines if output compression is enabled
+	 *
+	 * @var bool
+	 * @access 	protected
+	 */
 	protected $_zlib_oc			= FALSE;
+	/**
+	 * List of profiler sections
+	 *
+	 * @var array
+	 * @access 	protected
+	 */
 	protected $_profiler_sections = array();
-	protected $parse_exec_vars	= TRUE;	// whether or not to parse variables like {elapsed_time} and {memory_usage}
+	/**
+	 * Whether or not to parse variables like {elapsed_time} and {memory_usage}
+	 *
+	 * @var bool
+	 * @access 	protected
+	 */
+	protected $parse_exec_vars	= TRUE;
 
+	/**
+	 * Constructor
+	 *
+	 */
 	function __construct()
 	{
 		$this->_zlib_oc = @ini_get('zlib.output_compression');
@@ -127,6 +179,7 @@ class CI_Output {
 	 *
 	 * @access	public
 	 * @param	string
+	 * @param 	bool
 	 * @return	void
 	 */
 	function set_header($header, $replace = TRUE)
@@ -265,6 +318,7 @@ class CI_Output {
 	 * benchmark timer so the page rendering speed and memory usage can be shown.
 	 *
 	 * @access	public
+	 * @param 	string
 	 * @return	mixed
 	 */
 	function _display($output = '')
@@ -401,6 +455,7 @@ class CI_Output {
 	 * Write a Cache File
 	 *
 	 * @access	public
+	 * @param 	string
 	 * @return	void
 	 */
 	function _write_cache($output)
@@ -452,6 +507,8 @@ class CI_Output {
 	 * Update/serve a cached file
 	 *
 	 * @access	public
+	 * @param 	object	config class
+	 * @param 	object	uri class
 	 * @return	void
 	 */
 	function _display_cache(&$CFG, &$URI)
diff --git a/system/core/Router.php b/system/core/Router.php
index 5e92a04b1..6da667472 100644..100755
--- a/system/core/Router.php
+++ b/system/core/Router.php
@@ -28,12 +28,54 @@
  */
 class CI_Router {
 
+	/**
+	 * Config class
+	 *
+	 * @var object
+	 * @access public
+	 */
 	var $config;
+	/**
+	 * List of routes
+	 *
+	 * @var array
+	 * @access public
+	 */
 	var $routes			= array();
+	/**
+	 * List of error routes
+	 *
+	 * @var array
+	 * @access public
+	 */
 	var $error_routes	= array();
+	/**
+	 * Current class name
+	 *
+	 * @var string
+	 * @access public
+	 */
 	var $class			= '';
+	/**
+	 * Current method name
+	 *
+	 * @var string
+	 * @access public
+	 */
 	var $method			= 'index';
+	/**
+	 * Sub-directory that contains the requested controller class
+	 *
+	 * @var string
+	 * @access public
+	 */
 	var $directory		= '';
+	/**
+	 * Default controller (and method if specific)
+	 *
+	 * @var string
+	 * @access public
+	 */
 	var $default_controller;
 
 	/**
@@ -95,7 +137,7 @@ class CI_Router {
 		{
 			include(APPPATH.'config/routes.php');
 		}
-		
+
 		$this->routes = ( ! isset($route) OR ! is_array($route)) ? array() : $route;
 		unset($route);
 
@@ -244,7 +286,20 @@ class CI_Router {
 				// Does the requested controller exist in the sub-folder?
 				if ( ! file_exists(APPPATH.'controllers/'.$this->fetch_directory().$segments[0].'.php'))
 				{
-					show_404($this->fetch_directory().$segments[0]);
+					if ( ! empty($this->routes['404_override']))
+					{
+						$x = explode('/', $this->routes['404_override']);
+
+						$this->set_directory('');
+						$this->set_class($x[0]);
+						$this->set_method(isset($x[1]) ? $x[1] : 'index');
+
+						return $x;
+					}
+					else
+					{
+						show_404($this->fetch_directory().$segments[0]);
+					}
 				}
 			}
 			else
diff --git a/system/core/Security.php b/system/core/Security.php
index 3617cadcc..a3e227437 100644..100755
--- a/system/core/Security.php
+++ b/system/core/Security.php
@@ -25,14 +25,49 @@
  * @link		http://codeigniter.com/user_guide/libraries/security.html
  */
 class CI_Security {
-	
+
+	/**
+	 * Random Hash for protecting URLs
+	 *
+	 * @var string
+	 * @access protected
+	 */
 	protected $_xss_hash			= '';
+	/**
+	 * Random Hash for Cross Site Request Forgery Protection Cookie
+	 *
+	 * @var string
+	 * @access protected
+	 */
 	protected $_csrf_hash			= '';
-	protected $_csrf_expire			= 7200;  // Two hours (in seconds)
+	/**
+	 * Expiration time for Cross Site Request Forgery Protection Cookie
+	 * Defaults to two hours (in seconds)
+	 *
+	 * @var int
+	 * @access protected
+	 */
+	protected $_csrf_expire			= 7200;
+	/**
+	 * Token name for Cross Site Request Forgery Protection Cookie
+	 *
+	 * @var string
+	 * @access protected
+	 */
 	protected $_csrf_token_name		= 'ci_csrf_token';
+	/**
+	 * Cookie name for Cross Site Request Forgery Protection Cookie
+	 *
+	 * @var string
+	 * @access protected
+	 */
 	protected $_csrf_cookie_name	= 'ci_csrf_token';
-
-	/* never allowed, string replacement */
+	/**
+	 * List of never allowed strings
+	 *
+	 * @var array
+	 * @access protected
+	 */
 	protected $_never_allowed_str = array(
 					'document.cookie'	=> '[removed]',
 					'document.write'	=> '[removed]',
@@ -42,17 +77,24 @@ class CI_Security {
 					'-moz-binding'		=> '[removed]',
 					'<!--'				=> '&lt;!--',
 					'-->'				=> '--&gt;',
-					'<![CDATA['			=> '&lt;![CDATA['
+					'<![CDATA['			=> '&lt;![CDATA[',
+					'<comment>'			=> '&lt;comment&gt;'
 	);
 
 	/* never allowed, regex replacement */
+	/**
+	 * List of never allowed regex replacement
+	 *
+	 * @var array
+	 * @access protected
+	 */
 	protected $_never_allowed_regex = array(
 					"javascript\s*:"			=> '[removed]',
 					"expression\s*(\(|&\#40;)"	=> '[removed]', // CSS and IE
 					"vbscript\s*:"				=> '[removed]', // IE, surprise!
 					"Redirect\s+302"			=> '[removed]'
 	);
-	
+
 	/**
 	 * Constructor
 	 */
@@ -95,7 +137,7 @@ class CI_Security {
 		}
 
 		// Do the tokens exist in both the _POST and _COOKIE arrays?
-		if ( ! isset($_POST[$this->_csrf_token_name]) OR 
+		if ( ! isset($_POST[$this->_csrf_token_name]) OR
 			 ! isset($_COOKIE[$this->_csrf_cookie_name]))
 		{
 			$this->csrf_show_error();
@@ -107,7 +149,7 @@ class CI_Security {
 			$this->csrf_show_error();
 		}
 
-		// We kill this since we're done and we don't want to 
+		// We kill this since we're done and we don't want to
 		// polute the _POST array
 		unset($_POST[$this->_csrf_token_name]);
 
@@ -117,7 +159,7 @@ class CI_Security {
 		$this->csrf_set_cookie();
 
 		log_message('debug', "CSRF token verified ");
-		
+
 		return $this;
 	}
 
@@ -146,7 +188,7 @@ class CI_Security {
 		setcookie($this->_csrf_cookie_name, $this->_csrf_hash, $expire, config_item('cookie_path'), config_item('cookie_domain'), $secure_cookie);
 
 		log_message('debug', "CRSF cookie Set");
-		
+
 		return $this;
 	}
 
@@ -165,9 +207,9 @@ class CI_Security {
 	// --------------------------------------------------------------------
 
 	/**
-	 * Get CSRF Hash 
+	 * Get CSRF Hash
 	 *
-	 * Getter Method 
+	 * Getter Method
 	 *
 	 * @return 	string 	self::_csrf_hash
 	 */
@@ -215,6 +257,7 @@ class CI_Security {
 	 * http://ha.ckers.org/xss.html
 	 *
 	 * @param	mixed	string or array
+	 * @param 	bool
 	 * @return	string
 	 */
 	public function xss_clean($str, $is_image = FALSE)
@@ -263,7 +306,7 @@ class CI_Security {
 		 */
 
 		$str = preg_replace_callback("/[a-z]+=([\'\"]).*?\\1/si", array($this, '_convert_attribute'), $str);
-	
+
 		$str = preg_replace_callback("/<\w+.*?(?=>|<|$)/si", array($this, '_decode_entity'), $str);
 
 		/*
@@ -276,7 +319,7 @@ class CI_Security {
 		 *
 		 * This prevents strings like this: ja	vascript
 		 * NOTE: we deal with spaces between characters later.
-		 * NOTE: preg_replace was found to be amazingly slow here on 
+		 * NOTE: preg_replace was found to be amazingly slow here on
 		 * large blocks of data, so we use str_replace.
 		 */
 
@@ -304,8 +347,8 @@ class CI_Security {
 		 */
 		if ($is_image === TRUE)
 		{
-			// Images have a tendency to have the PHP short opening and 
-			// closing tags every so often so we skip those and only 
+			// Images have a tendency to have the PHP short opening and
+			// closing tags every so often so we skip those and only
 			// do the long opening tags.
 			$str = preg_replace('/<\?(php)/i', "&lt;?\\1", $str);
 		}
@@ -321,10 +364,10 @@ class CI_Security {
 		 * These words are compacted back to their correct state.
 		 */
 		$words = array(
-				'javascript', 'expression', 'vbscript', 'script', 
+				'javascript', 'expression', 'vbscript', 'script',
 				'applet', 'alert', 'document', 'write', 'cookie', 'window'
 			);
-			
+
 		foreach ($words as $word)
 		{
 			$temp = '';
@@ -341,8 +384,8 @@ class CI_Security {
 
 		/*
 		 * Remove disallowed Javascript in links or img tags
-		 * We used to do some version comparisons and use of stripos for PHP5, 
-		 * but it is dog slow compared to these simplified non-capturing 
+		 * We used to do some version comparisons and use of stripos for PHP5,
+		 * but it is dog slow compared to these simplified non-capturing
 		 * preg_match(), especially if the pattern exists in the string
 		 */
 		do
@@ -405,11 +448,11 @@ class CI_Security {
 
 		/*
 		 * Images are Handled in a Special Way
-		 * - Essentially, we want to know that after all of the character 
-		 * conversion is done whether any unwanted, likely XSS, code was found.  
+		 * - Essentially, we want to know that after all of the character
+		 * conversion is done whether any unwanted, likely XSS, code was found.
 		 * If not, we return TRUE, as the image is clean.
-		 * However, if the string post-conversion does not matched the 
-		 * string post-removal of XSS, then it fails, as there was unwanted XSS 
+		 * However, if the string post-conversion does not matched the
+		 * string post-removal of XSS, then it fails, as there was unwanted XSS
 		 * code found and removed/changed during processing.
 		 */
 
@@ -433,15 +476,7 @@ class CI_Security {
 	{
 		if ($this->_xss_hash == '')
 		{
-			if (phpversion() >= 4.2)
-			{
-				mt_srand();
-			}
-			else
-			{
-				mt_srand(hexdec(substr(md5(microtime()), -8)) & 0x7fffffff);
-			}
-
+			mt_srand();
 			$this->_xss_hash = md5(time() + mt_rand(0, 1999999999));
 		}
 
@@ -455,14 +490,11 @@ class CI_Security {
 	 *
 	 * This function is a replacement for html_entity_decode()
 	 *
-	 * In some versions of PHP the native function does not work
-	 * when UTF-8 is the specified character set, so this gives us
-	 * a work-around.  More info here:
-	 * http://bugs.php.net/bug.php?id=25670
-	 *
-	 * NOTE: html_entity_decode() has a bug in some PHP versions when UTF-8 is the
-	 * character set, and the PHP developers said they were not back porting the
-	 * fix to versions other than PHP 5.x.
+	 * The reason we are not using html_entity_decode() by itself is because
+	 * while it is not technically correct to leave out the semicolon
+	 * at the end of an entity most browsers will still interpret the entity
+	 * correctly.  html_entity_decode() does not convert entities without
+	 * semicolons, so we are left with our own little solution here. Bummer.
 	 *
 	 * @param	string
 	 * @param	string
@@ -470,33 +502,14 @@ class CI_Security {
 	 */
 	public function entity_decode($str, $charset='UTF-8')
 	{
-		if (stristr($str, '&') === FALSE) return $str;
-
-		// The reason we are not using html_entity_decode() by itself is because
-		// while it is not technically correct to leave out the semicolon
-		// at the end of an entity most browsers will still interpret the entity
-		// correctly.  html_entity_decode() does not convert entities without
-		// semicolons, so we are left with our own little solution here. Bummer.
-
-		if (function_exists('html_entity_decode') && 
-			(strtolower($charset) != 'utf-8'))
-		{
-			$str = html_entity_decode($str, ENT_COMPAT, $charset);
-			$str = preg_replace('~&#x(0*[0-9a-f]{2,5})~ei', 'chr(hexdec("\\1"))', $str);
-			return preg_replace('~&#([0-9]{2,4})~e', 'chr(\\1)', $str);
-		}
-
-		// Numeric Entities
-		$str = preg_replace('~&#x(0*[0-9a-f]{2,5});{0,1}~ei', 'chr(hexdec("\\1"))', $str);
-		$str = preg_replace('~&#([0-9]{2,4});{0,1}~e', 'chr(\\1)', $str);
-
-		// Literal Entities - Slightly slow so we do another check
 		if (stristr($str, '&') === FALSE)
 		{
-			$str = strtr($str, array_flip(get_html_translation_table(HTML_ENTITIES)));
+			return $str;
 		}
 
-		return $str;
+		$str = html_entity_decode($str, ENT_COMPAT, $charset);
+		$str = preg_replace('~&#x(0*[0-9a-f]{2,5})~ei', 'chr(hexdec("\\1"))', $str);
+		return preg_replace('~&#([0-9]{2,4})~e', 'chr(\\1)', $str);
 	}
 
 	// --------------------------------------------------------------------
@@ -505,6 +518,7 @@ class CI_Security {
 	 * Filename Security
 	 *
 	 * @param	string
+	 * @param 	bool
 	 * @return	string
 	 */
 	public function sanitize_filename($str, $relative_path = FALSE)
@@ -542,7 +556,7 @@ class CI_Security {
 						"%3b",		// ;
 						"%3d"		// =
 					);
-		
+
 		if ( ! $relative_path)
 		{
 			$bad[] = './';
@@ -570,7 +584,7 @@ class CI_Security {
 	}
 
 	// --------------------------------------------------------------------
-	
+
 	/*
 	 * Remove Evil HTML Attributes (like evenhandlers and style)
 	 *
@@ -578,7 +592,7 @@ class CI_Security {
 	 * 	- Everything up until a space
 	 *		For example, everything between the pipes:
 	 *		<a |style=document.write('hello');alert('world');| class=link>
-	 * 	- Everything inside the quotes 
+	 * 	- Everything inside the quotes
 	 *		For example, everything between the pipes:
 	 *		<a |style="document.write('hello'); alert('world');"| class="link">
 	 *
@@ -589,7 +603,7 @@ class CI_Security {
 	protected function _remove_evil_attributes($str, $is_image)
 	{
 		// All javascript event handlers (e.g. onload, onclick, onmouseover), style, and xmlns
-		$evil_attributes = array('on\w*', 'style', 'xmlns');
+		$evil_attributes = array('on\w*', 'style', 'xmlns', 'formaction');
 
 		if ($is_image === TRUE)
 		{
@@ -601,16 +615,36 @@ class CI_Security {
 		}
 		
 		do {
-			$str = preg_replace(
-				"#<(/?[^><]+?)([^A-Za-z\-])(".implode('|', $evil_attributes).")(\s*=\s*)([\"][^>]*?[\"]|[\'][^>]*?[\']|[^>]*?)([\s><])([><]*)#i",
-				"<$1$6",
-				$str, -1, $count
-			);
+			$count = 0;
+			$attribs = array();
+			
+			// find occurrences of illegal attribute strings without quotes
+			preg_match_all("/(".implode('|', $evil_attributes).")\s*=\s*([^\s]*)/is",  $str, $matches, PREG_SET_ORDER);
+			
+			foreach ($matches as $attr)
+			{
+				$attribs[] = preg_quote($attr[0], '/');
+			}
+			
+			// find occurrences of illegal attribute strings with quotes (042 and 047 are octal quotes)
+			preg_match_all("/(".implode('|', $evil_attributes).")\s*=\s*(\042|\047)([^\\2]*?)(\\2)/is",  $str, $matches, PREG_SET_ORDER);
+
+			foreach ($matches as $attr)
+			{
+				$attribs[] = preg_quote($attr[0], '/');
+			}
+
+			// replace illegal attribute strings that are inside an html tag
+			if (count($attribs) > 0)
+			{
+				$str = preg_replace("/<(\/?[^><]+?)([^A-Za-z\-])(".implode('|', $attribs).")([\s><])([><]*)/i", '<$1$2$4$5', $str, -1, $count);
+			}
+			
 		} while ($count);
 		
 		return $str;
 	}
-	
+
 	// --------------------------------------------------------------------
 
 	/**
@@ -627,7 +661,7 @@ class CI_Security {
 		$str = '&lt;'.$matches[1].$matches[2].$matches[3];
 
 		// encode captured opening or closing brace to prevent recursive vectors
-		$str .= str_replace(array('>', '<'), array('&gt;', '&lt;'), 
+		$str .= str_replace(array('>', '<'), array('&gt;', '&lt;'),
 							$matches[4]);
 
 		return $str;
@@ -649,7 +683,7 @@ class CI_Security {
 	protected function _js_link_removal($match)
 	{
 		$attributes = $this->_filter_attributes(str_replace(array('<', '>'), '', $match[1]));
-		
+
 		return str_replace($match[1], preg_replace("#href=.*?(alert\(|alert&\#40;|javascript\:|livescript\:|mocha\:|charset\=|window\.|document\.|\.cookie|<script|<xss|base64\s*,)#si", "", $attributes), $match[0]);
 	}
 
@@ -669,7 +703,7 @@ class CI_Security {
 	protected function _js_img_removal($match)
 	{
 		$attributes = $this->_filter_attributes(str_replace(array('<', '>'), '', $match[1]));
-		
+
 		return str_replace($match[1], preg_replace("#src=.*?(alert\(|alert&\#40;|javascript\:|livescript\:|mocha\:|charset\=|window\.|document\.|\.cookie|<script|<xss|base64\s*,)#si", "", $attributes), $match[0]);
 	}
 
@@ -729,13 +763,13 @@ class CI_Security {
 	}
 
 	// --------------------------------------------------------------------
-	
+
 	/**
 	 * Validate URL entities
 	 *
 	 * Called by xss_clean()
 	 *
-	 * @param 	string	
+	 * @param 	string
 	 * @return 	string
 	 */
 	protected function _validate_entities($str)
@@ -743,9 +777,9 @@ class CI_Security {
 		/*
 		 * Protect GET variables in URLs
 		 */
-		
+
 		 // 901119URL5918AMP18930PROTECT8198
-		
+
 		$str = preg_replace('|\&([a-z\_0-9\-]+)\=([a-z\_0-9\-]+)|i', $this->xss_hash()."\\1=\\2", $str);
 
 		/*
@@ -769,7 +803,7 @@ class CI_Security {
 		 * Un-Protect GET variables in URLs
 		 */
 		$str = str_replace($this->xss_hash(), '&', $str);
-		
+
 		return $str;
 	}
 
@@ -794,7 +828,7 @@ class CI_Security {
 		{
 			$str = preg_replace("#".$key."#i", $val, $str);
 		}
-		
+
 		return $str;
 	}
 
@@ -809,16 +843,16 @@ class CI_Security {
 	{
 		if ($this->_csrf_hash == '')
 		{
-			// If the cookie exists we will use it's value.  
+			// If the cookie exists we will use it's value.
 			// We don't necessarily want to regenerate it with
-			// each page load since a page could contain embedded 
+			// each page load since a page could contain embedded
 			// sub-pages causing this feature to fail
-			if (isset($_COOKIE[$this->_csrf_cookie_name]) && 
+			if (isset($_COOKIE[$this->_csrf_cookie_name]) &&
 				$_COOKIE[$this->_csrf_cookie_name] != '')
 			{
 				return $this->_csrf_hash = $_COOKIE[$this->_csrf_cookie_name];
 			}
-			
+
 			return $this->_csrf_hash = md5(uniqid(rand(), TRUE));
 		}
 
diff --git a/system/core/URI.php b/system/core/URI.php
index 20f0f006b..a3ae20cc3 100644..100755
--- a/system/core/URI.php
+++ b/system/core/URI.php
@@ -28,9 +28,34 @@
  */
 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();
 
 	/**
@@ -127,6 +152,7 @@ class CI_URI {
 	 * Set the URI String
 	 *
 	 * @access	public
+	 * @param 	string
 	 * @return	string
 	 */
 	function _set_uri_string($str)
@@ -366,6 +392,11 @@ class CI_URI {
 	/**
 	 * Identical to above only it uses the re-routed segment array
 	 *
+	 * @access 	public
+	 * @param 	integer	the starting segment number
+	 * @param 	array	an array of default values
+	 * @return 	array
+	 *
 	 */
 	function ruri_to_assoc($n = 3, $default = array())
 	{