31 files changed, 211 insertions, 296 deletions

diff --git a/system/application/config/autoload.php b/system/application/config/autoload.php
index 245d36a7c..6a62cd652 100644
--- a/system/application/config/autoload.php
+++ b/system/application/config/autoload.php
@@ -37,7 +37,7 @@
 |	$autoload['libraries'] = array('database', 'session', 'xmlrpc');
 */
 
-$autoload['libraries'] = array('database', 'calendar', 'dbutil', 'dbexport');
+$autoload['libraries'] = array('database', 'calendar');
 
 
 /*
diff --git a/system/application/config/routes.php b/system/application/config/routes.php
index 8a1f8b166..468ff0ab5 100644
--- a/system/application/config/routes.php
+++ b/system/application/config/routes.php
@@ -33,7 +33,7 @@
 |
 |	$route['scaffolding_trigger'] = 'scaffolding';
 |
-| This route lets you set a "secret" word that will trigger the 
+| This route lets you se t a "secret" word that will trigger the 
 | scaffolding feature for added security. Note: Scaffolding must be 
 | enabled in the controller in which you intend to use it.
 |
diff --git a/system/codeigniter/CodeIgniter.php b/system/codeigniter/CodeIgniter.php
index 05194503f..4ac03820a 100644
--- a/system/codeigniter/CodeIgniter.php
+++ b/system/codeigniter/CodeIgniter.php
@@ -50,7 +50,7 @@ set_magic_quotes_runtime(0); // Kill magic quotes
  * ------------------------------------------------------
  */
 
-$BM =& _load_class('CI_Benchmark');
+$BM =& _load_class('Benchmark');
 $BM->mark('code_igniter_start');
 
 /*
@@ -59,7 +59,7 @@ $BM->mark('code_igniter_start');
  * ------------------------------------------------------
  */
 
-$EXT =& _load_class('CI_Hooks');
+$EXT =& _load_class('Hooks');
 
 /*
  * ------------------------------------------------------
@@ -74,9 +74,9 @@ $EXT->_call_hook('pre_system');
  * ------------------------------------------------------
  */
 
-$CFG =& _load_class('CI_Config');
-$RTR =& _load_class('CI_Router');
-$OUT =& _load_class('CI_Output');
+$CFG =& _load_class('Config');
+$RTR =& _load_class('Router');
+$OUT =& _load_class('Output');
 
 /*
  * ------------------------------------------------------
@@ -98,9 +98,9 @@ if ($EXT->_call_hook('cache_override') === FALSE)
  * ------------------------------------------------------
  */
 
-$IN		=& _load_class('CI_Input');
-$URI	=& _load_class('CI_URI');
-$LANG	=& _load_class('CI_Language');
+$IN		=& _load_class('Input');
+$URI	=& _load_class('URI');
+$LANG	=& _load_class('Language');
 
 /*
  * ------------------------------------------------------
@@ -115,7 +115,7 @@ $LANG	=& _load_class('CI_Language');
  * 
  */
  
-_load_class('CI_Loader', FALSE); 
+_load_class('Loader', FALSE); 
   
 if (floor(phpversion()) < 5)
 {
@@ -126,7 +126,7 @@ else
 	require(BASEPATH.'codeigniter/Base5'.EXT);
 }
 
-_load_class('CI_Controller', FALSE); 
+_load_class('Controller', FALSE); 
 
 require(APPPATH.'controllers/'.$RTR->fetch_directory().$RTR->fetch_class().EXT);
 
diff --git a/system/codeigniter/Common.php b/system/codeigniter/Common.php
index 885cca2f5..24e6042cc 100644
--- a/system/codeigniter/Common.php
+++ b/system/codeigniter/Common.php
@@ -32,42 +32,81 @@
 /**
 * Class registry
 *
-*
+* This function acts as a singleton.  If the requested class does not
+* exist it is instantiated and set to a static variable.  If it has
+* previously been instantiated the variable is returned.
+* 
 * @access	public
 * @return	object
 */
 function &_load_class($class, $instantiate = TRUE)
 {
 	static $objects = array();
-	
-	if ( ! isset($objects[$class]))
+
+	// Does the class exist?  If so, we're done...
+	if (isset($objects[$class]))
 	{
-		if (FALSE !== strpos($class, 'CI_'))
-		{
-			if (file_exists(APPPATH.'libraries/'.str_replace('CI_', '', $class).EXT))
-			{
-				require(APPPATH.'libraries/'.str_replace('CI_', '', $class).EXT);	
-			}
-			else
-			{
-				require(BASEPATH.'libraries/'.str_replace('CI_', '', $class).EXT);	
-			}
-		}
+		return $objects[$class];
+	}
 	
-		if ($instantiate == TRUE)
+	// This is a special case.  It's a class in the Base5.php file
+	// which we don't need to load.  We only instantiate it.
+	if ($class == 'Instance')
+	{
+		return $objects[$class] =& new $class();	
+	}
+		
+	// If the requested class does not exist in the application/libraries
+	// folder we'll load the native class from the system/libraries folder.
+
+	$is_subclass = FALSE;	
+	if ( ! file_exists(APPPATH.'libraries/'.$class.EXT))
+	{
+		require(BASEPATH.'libraries/'.$class.EXT);		
+	}
+	else
+	{
+		// A core class can either be extended or replaced by putting an
+		// identially named file in the application/libraries folder.  
+		// We need to need to determine if the class being requested is 
+		// a sub-class or an independent instance so we'll open the file,
+		// read the top portion of it. If the class extends the base class
+		// we need to load it's parent. If it doesn't extend the base we'll
+		// only load the requested class.
+		
+		// Note: I'm not thrilled with this approach since it requires us to
+		// read the file, but I can't think of any other way to allow classes
+		// to be extended on-the-fly.  I did benchmark the difference with and
+		// without the file reading and I'm not seeing a perceptable difference.
+		
+		$fp	= fopen(APPPATH.'libraries/'.$class.EXT, "rb");
+		if (preg_match("/MY_".$class."\s+extends\s+CI_".$class."/", fread($fp, '8000')))
 		{
-			if ($class == 'CI_Controller')
-				$class = 'Controller';
-				
-			$objects[$class] =& new $class();
+			require(BASEPATH.'libraries/'.$class.EXT);	
+			require(APPPATH.'libraries/'.$class.EXT);
+			$is_subclass = TRUE;
 		}
 		else
 		{
-			$objects[$class] = TRUE;
+			require(APPPATH.'libraries/'.$class.EXT);
 		}
+		fclose($fp);	
 	}
+
+	if ($instantiate == FALSE)
+	{
+		return $objects[$class] = TRUE;
+	}
+		
+	if ($is_subclass == TRUE)
+	{
+		$name = 'MY_'.$class;
+		return $objects[$class] =& new $name();
+	}
+
+	$name = ($class != 'Controller') ? 'CI_'.$class : $class;
 	
-	return $objects[$class];
+	return $objects[$class] =& new $name();	
 }
 
 /**
@@ -115,7 +154,7 @@ function &_get_config()
 */
 function show_error($message)
 {
-	$error =& _load_class('CI_Exceptions');
+	$error =& _load_class('Exceptions');
 	echo $error->show_error('An Error Was Encountered', $message);
 	exit;
 }
@@ -133,7 +172,7 @@ function show_error($message)
 */
 function show_404($page = '')
 {
-	$error =& _load_class('CI_Exceptions');
+	$error =& _load_class('Exceptions');
 	$error->show_404($page);
 	exit;
 }
@@ -158,7 +197,7 @@ function log_message($level = 'error', $message, $php_error = FALSE)
 		return;
 	}
 
-	$LOG =& _load_class('CI_Log');	
+	$LOG =& _load_class('Log');	
 	$LOG->write_log($level, $message, $php_error);
 }
 
@@ -191,7 +230,7 @@ function _exception_handler($severity, $message, $filepath, $line)
 		return;
 	}
 
-	$error =& _load_class('CI_Exceptions');
+	$error =& _load_class('Exceptions');
 
 	// Should we display the error?  
 	// We'll get the current error_reporting level and add its bits
diff --git a/system/database/DB_export.php b/system/database/DB_export.php
index a2e3e3e4c..1704f0dfd 100644
--- a/system/database/DB_export.php
+++ b/system/database/DB_export.php
@@ -13,12 +13,6 @@
  * @filesource
  */
 
- 
-// INITIALIZE THE CLASS ---------------------------------------------------
-
-$obj =& get_instance();
-$obj->init_class('CI_DB_export', 'dbexport');
-
 // ------------------------------------------------------------------------
 
 /**
diff --git a/system/database/DB_utility.php b/system/database/DB_utility.php
index a2469d059..764f10cb7 100644
--- a/system/database/DB_utility.php
+++ b/system/database/DB_utility.php
@@ -12,11 +12,6 @@
  * @since		Version 1.0
  * @filesource
  */
- 
-// INITIALIZE THE CLASS ---------------------------------------------------
-
-$obj =& get_instance();
-$obj->init_class('CI_DB_utility', 'dbutility');
 
 // ------------------------------------------------------------------------
 
diff --git a/system/database/drivers/mysql/mysql_driver.php b/system/database/drivers/mysql/mysql_driver.php
index d4f322d5f..792e023a8 100644
--- a/system/database/drivers/mysql/mysql_driver.php
+++ b/system/database/drivers/mysql/mysql_driver.php
@@ -227,9 +227,13 @@ class CI_DB_mysql_driver extends CI_DB {
 			return $str;
 		}
 
-    	if (function_exists('mysql_escape_string'))
+    	if (function_exists('mysql_real_escape_string'))
     	{
-			return mysql_real_escape_string($str);
+			return mysql_real_escape_string($str, $this->conn_id);
+		}
+		elseif (function_exists('mysql_escape_string'))
+		{
+			return mysql_escape_string($str);
 		}
 		else
 		{
diff --git a/system/database/drivers/mysqli/mysqli_driver.php b/system/database/drivers/mysqli/mysqli_driver.php
index 63df0fe6f..b158cfefe 100644
--- a/system/database/drivers/mysqli/mysqli_driver.php
+++ b/system/database/drivers/mysqli/mysqli_driver.php
@@ -230,14 +230,7 @@ class CI_DB_mysqli_driver extends CI_DB {
 			return $str;
 		}
 
-    	if (function_exists('mysql_escape_string'))
-    	{
-			return mysqli_real_escape_string($this->conn_id, $str);
-		}
-		else
-		{
-        	return addslashes($str);
-    	}
+		return mysqli_real_escape_string($this->conn_id, $str);
 	}
 		
 	// --------------------------------------------------------------------
diff --git a/system/libraries/Benchmark.php b/system/libraries/Benchmark.php
index 9dd9d4ac4..d8dd903e7 100644
--- a/system/libraries/Benchmark.php
+++ b/system/libraries/Benchmark.php
@@ -31,15 +31,6 @@ class CI_Benchmark {
 
 	var $marker = array();
 
-	/**
-	 * Constructor
-	 *
-	 * @access	public
-	 */
-    function CI_Benchmark()
-    {
-    }
-    // END CI_Benchmark()
     
 	// --------------------------------------------------------------------
 
diff --git a/system/libraries/Calendar.php b/system/libraries/Calendar.php
index bde98113a..8c7d95aa5 100644
--- a/system/libraries/Calendar.php
+++ b/system/libraries/Calendar.php
@@ -13,11 +13,6 @@
  * @filesource
  */
  
-// INITIALIZE THE CLASS ---------------------------------------------------
-
-$obj =& get_instance();
-$obj->init_class('CI_Calendar');
-
 // ------------------------------------------------------------------------
 
 /**
diff --git a/system/libraries/Controller.php b/system/libraries/Controller.php
index 56b4d6f90..aa7b87b00 100644
--- a/system/libraries/Controller.php
+++ b/system/libraries/Controller.php
@@ -32,8 +32,6 @@ class Controller extends CI_Base {
 	var $_ci_models			= array();
 	var $_ci_scaffolding	= FALSE;
 	var $_ci_scaff_table	= FALSE;
-	var $_ci_last_handle	= NULL;
-	var $_ci_last_params	= NULL;
 	
 	/**
 	 * Constructor
@@ -71,48 +69,6 @@ class Controller extends CI_Base {
 	/**
 	 * Initialization Handler
 	 *
-	 * Designed to be called from the class files themselves.
-	 * See: http://www.codeigniter.com/user_guide/general/creating_libraries.html
-	 *
-	 * @access	public
-	 * @param 	string	class name
-	 * @param 	string	variable name
-	 * @param	mixed	any additional parameters
-	 * @return 	void
-	 */
-	function init_class($class, $varname = '', $params = NULL)
-	{
-		// First figure out what variable we're going to assign the class to
-		if ($varname == '')
-		{
-			$varname = ( ! is_null($this->_ci_last_handle)) ? $this->_ci_last_handle : strtolower(str_replace('CI_', '', $class));
-		}
-		
-		// Are there any parameters?
-		if ($params === NULL AND $this->_ci_last_params !== NULL)
-		{
-			$params = $this->_ci_last_params;
-		}
-		
-		// Instantiate the class
-		if ( ! is_null($params))
-		{
-			$this->$varname = new $class($params);
-		}
-		else
-		{
-			$this->$varname = new $class;
-		}	
-		
-		$this->_ci_last_params = NULL;
-		$this->_ci_last_handle = NULL;
-	}
-
-	// --------------------------------------------------------------------
-
-	/**
-	 * Initialization Handler
-	 *
 	 * This function loads the requested class.
 	 *
 	 * @access	private
@@ -120,15 +76,21 @@ class Controller extends CI_Base {
 	 * @param	mixed	any additional parameters
 	 * @return 	void
 	 */
-	function _ci_init_class($class, $params = NULL)
+	function _ci_load_class($class, $params = NULL)
 	{	
 		// Prep the class name
 		$class = strtolower(str_replace(EXT, '', $class));
-		
-		// These are used by $this->init_class() above.
-		// They lets us dynamically set the object name and pass parameters
-		$this->_ci_last_handle = $class;		
-		$this->_ci_last_params = $params;
+
+		// Is this a class extension request?	
+		if (substr($class, 0, 3) == 'my_')
+		{
+			$class = preg_replace("/my_(.+)/", "\\1", $class);
+			$extend = TRUE;
+		}
+		else
+		{
+			$extend = FALSE;
+		}
 		
 		// Does THIS file (Controller.php) contain an initialization
 		// function that maps to the requested class?
@@ -150,30 +112,101 @@ class Controller extends CI_Base {
 			return TRUE;
 		}
 		
-		// Lets search for the requested library file and load it.
-		// We'll assume that the file we load contains a call to
-		// $obj->init_class() so that the class can get instantiated.
-		// For backward compatibility we'll test for filenames that are
-		// both uppercase and lower.
-		foreach (array(ucfirst($class), $class) as $filename)
+		// Are we extending one of the base classes?
+		if ($extend == TRUE)
 		{
-			for ($i = 1; $i < 3; $i++)
+			// Load the requested library from the main system/libraries folder
+			if (file_exists(BASEPATH.'libraries/'.ucfirst($class).EXT))
 			{
-				$path = ($i % 2) ? APPPATH : BASEPATH;
+				include_once(BASEPATH.'libraries/'.ucfirst($class).EXT);
+			}
 			
-				if (file_exists($path.'libraries/'.$filename.EXT))
+			// Now look for a matching library
+			foreach (array(ucfirst($class), $class) as $filename)
+			{
+				if (file_exists(APPPATH.'libraries/'.$filename.EXT))
 				{
-					include_once($path.'libraries/'.$filename.EXT);
-					return TRUE;	
+					include_once(APPPATH.'libraries/'.$filename.EXT);	
+				}
+			}
+			
+			return $this->_ci_init_class($filename, 'MY_', $params);
+		}
+		else
+		{		
+			// Lets search for the requested library file and load it.
+			// For backward compatibility we'll test for filenames that are
+			// both uppercase and lower.
+			foreach (array(ucfirst($class), $class) as $filename)
+			{
+				for ($i = 1; $i < 3; $i++)
+				{
+					$path = ($i % 2) ? APPPATH : BASEPATH;
+				
+					if (file_exists($path.'libraries/'.$filename.EXT))
+					{
+						include_once($path.'libraries/'.$filename.EXT);
+						return $this->_ci_init_class($filename, '', $params);
+					}
 				}
 			}
-		
 		}
 		
 		// If we got this far we were unable to find the requested class
 		log_message('error', "Unable to load the requested class: ".$class);
 		show_error("Unable to load the class: ".$class);
 	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Instantiates a class
+	 *
+	 * @access	private
+	 * @param	string
+	 * @param	string
+	 * @return	null
+	 */
+	function _ci_init_class($class, $prefix = '', $config = NULL)
+	{
+		// Is there an associated config file for this class?
+		
+		if ($config == NULL)
+		{
+			if (file_exists(APPPATH.'config/'.$class.EXT))
+			{
+				include_once(APPPATH.'config/'.$class.EXT);
+			}
+		}
+		
+		if ($prefix == '')
+		{
+			$name = ( ! class_exists($class)) ? 'CI_'.$class : $class;
+		}
+		else
+		{
+			$name = $prefix.ucfirst($class);
+		}
+		
+		$remap = array(
+						'DB_export'		=> 'dbexport',
+						'DB_utility'	=> 'dbutility',
+						'Encryption'	=> 'encrypt',
+						'Unit_test' 	=> 'unit'
+						);
+						
+		$varname = ( ! isset($remap[$class])) ? $class : $remap[$class];
+		
+		// Instantiate the class
+		if ($config !== NULL)
+		{
+			$this->$varname = new $name($config);
+		}
+		else
+		{
+			$this->$varname = new $name;
+		}	
+	}
   	
 	// --------------------------------------------------------------------
 
@@ -305,7 +338,7 @@ class Controller extends CI_Base {
 		{
 			if ( ! in_array($item, $exceptions))
 			{
-				$this->_ci_init_class($item);
+				$this->_ci_load_class($item);
 			}
 			else
 			{
@@ -334,10 +367,10 @@ class Controller extends CI_Base {
 		foreach (array('Config', 'Input', 'Benchmark', 'URI', 'Output') as $val)
 		{
 			$class = strtolower($val);
-			$this->$class =& _load_class('CI_'.$val);
+			$this->$class =& _load_class($val);
 		}
 		
-		$this->lang	=& _load_class('CI_Language');
+		$this->lang	=& _load_class('Language');
 	
 		// In PHP 4 the Controller class is a child of CI_Loader.
 		// In PHP 5 we run it as its own class.
@@ -529,7 +562,7 @@ class Controller extends CI_Base {
 		}
 		
 		$this->_ci_init_database("", FALSE, TRUE);
-		$this->_ci_init_class('pagination');
+		$this->_ci_load_class('pagination');
 		require_once(BASEPATH.'scaffolding/Scaffolding'.EXT);
 		$this->scaff = new Scaffolding($this->_ci_scaff_table);
 		$this->scaff->$method();
diff --git a/system/libraries/Email.php b/system/libraries/Email.php
index fd3fb8f17..5b991d1fa 100644
--- a/system/libraries/Email.php
+++ b/system/libraries/Email.php
@@ -13,17 +13,6 @@
  * @filesource
  */
  
-// INITIALIZE THE CLASS ---------------------------------------------------
-
-$config = array();
-if (file_exists(APPPATH.'config/email'.EXT))
-{
-	include_once(APPPATH.'config/email'.EXT);
-}
-
-$obj =& get_instance();
-$obj->init_class('CI_Email', 'email', $config);
-
 // ------------------------------------------------------------------------
 
 /**
diff --git a/system/libraries/Encrypt.php b/system/libraries/Encrypt.php
index 6a3ca17b0..abc769460 100644
--- a/system/libraries/Encrypt.php
+++ b/system/libraries/Encrypt.php
@@ -12,11 +12,6 @@
  * @since		Version 1.0
  * @filesource
  */
- 
-// INITIALIZE THE CLASS ---------------------------------------------------
-
-$obj =& get_instance();
-$obj->init_class('CI_Encrypt');
 
 // ------------------------------------------------------------------------
 
diff --git a/system/libraries/Hooks.php b/system/libraries/Hooks.php
index 7ff0592ff..69ca1a9f1 100644
--- a/system/libraries/Hooks.php
+++ b/system/libraries/Hooks.php
@@ -41,7 +41,7 @@ class CI_Hooks {
 	{
 		log_message('debug', "Hooks Class Initialized");
 	
-		$CFG =& _load_class('CI_Config');
+		$CFG =& _load_class('Config');
 		
 		// If hooks are not enabled in the config file
 		// there is nothing else to do
diff --git a/system/libraries/Image_lib.php b/system/libraries/Image_lib.php
index 4962760eb..18e3253f7 100644
--- a/system/libraries/Image_lib.php
+++ b/system/libraries/Image_lib.php
@@ -13,17 +13,6 @@
  * @filesource
  */
  
-// INITIALIZE THE CLASS ---------------------------------------------------
-
-$config = array();
-if (file_exists(APPPATH.'config/image_lib'.EXT))
-{
-	include_once(APPPATH.'config/image_lib'.EXT);
-}
-
-$obj =& get_instance();
-$obj->init_class('CI_Image_lib', '', $config);
-
 // ------------------------------------------------------------------------
 
 /**
diff --git a/system/libraries/Input.php b/system/libraries/Input.php
index dbf939b18..ad7b0c571 100644
--- a/system/libraries/Input.php
+++ b/system/libraries/Input.php
@@ -42,7 +42,7 @@ class CI_Input {
 	 */	
 	function CI_Input()
 	{	
-		$CFG =& _load_class('CI_Config');
+		$CFG =& _load_class('Config');
 		$this->use_xss_clean	= ($CFG->item('global_xss_filtering') === TRUE) ? TRUE : FALSE;
 		$this->allow_get_array	= ($CFG->item('enable_query_strings') === TRUE) ? TRUE : FALSE;
 		
diff --git a/system/libraries/Loader.php b/system/libraries/Loader.php
index 90d824049..fff9e78d3 100644
--- a/system/libraries/Loader.php
+++ b/system/libraries/Loader.php
@@ -71,7 +71,7 @@ class CI_Loader {
 			return;
 	
 		$obj =& get_instance();
-		$obj->_ci_init_class($class, $param);
+		$obj->_ci_load_class($class, $param);
 		$obj->_ci_assign_to_models();
 	}
 
diff --git a/system/libraries/Output.php b/system/libraries/Output.php
index 5a158245f..1c3f0d604 100644
--- a/system/libraries/Output.php
+++ b/system/libraries/Output.php
@@ -237,8 +237,8 @@ class CI_Output {
 	 */	
 	function _display_cache(&$CFG, &$RTR)
 	{
-		$CFG =& _load_class('CI_Config');
-		$RTR =& _load_class('CI_Router');
+		$CFG =& _load_class('Config');
+		$RTR =& _load_class('Router');
 	
 		$cache_path = ($CFG->item('cache_path') == '') ? BASEPATH.'cache/' : $CFG->item('cache_path');
 			
diff --git a/system/libraries/Pagination.php b/system/libraries/Pagination.php
index cd55d56e0..867d214fc 100644
--- a/system/libraries/Pagination.php
+++ b/system/libraries/Pagination.php
@@ -12,17 +12,6 @@
  * @since		Version 1.0
  * @filesource
  */
- 
-// INITIALIZE THE CLASS ---------------------------------------------------
-
-$config = array();
-if (file_exists(APPPATH.'config/pagination'.EXT))
-{
-	include_once(APPPATH.'config/pagination'.EXT);
-}
-
-$obj =& get_instance();
-$obj->init_class('CI_Pagination', '', $config);
 
 // ------------------------------------------------------------------------
 
diff --git a/system/libraries/Parser.php b/system/libraries/Parser.php
index 76182271f..42e78b0ee 100644
--- a/system/libraries/Parser.php
+++ b/system/libraries/Parser.php
@@ -12,11 +12,6 @@
  * @since		Version 1.0
  * @filesource
  */
- 
-// INITIALIZE THE CLASS ---------------------------------------------------
-
-$obj =& get_instance();
-$obj->init_class('CI_Parser');
 
 // ------------------------------------------------------------------------
 
diff --git a/system/libraries/Router.php b/system/libraries/Router.php
index 34a2512a6..c056530a3 100644
--- a/system/libraries/Router.php
+++ b/system/libraries/Router.php
@@ -33,6 +33,7 @@ class CI_Router {
 	var $segments		= array();
 	var $rsegments		= array();
 	var $routes 		= array();
+	var $error_routes	= array();
 	var $class			= '';
 	var $method			= 'index';
 	var $directory		= '';
@@ -47,7 +48,7 @@ class CI_Router {
 	 */
 	function CI_Router()
 	{
-		$this->config =& _load_class('CI_Config');
+		$this->config =& _load_class('Config');
 		$this->_set_route_mapping();
 		log_message('debug', "Router Class Initialized");
 	}
@@ -87,8 +88,8 @@ class CI_Router {
 
 		// Set the default controller so we can display it in the event
 		// the URI doesn't correlated to a valid controller.
-		$this->default_controller = ( ! isset($this->routes['default_controller']) OR $this->routes['default_controller'] == '') ? FALSE : strtolower($this->routes['default_controller']);		
-	
+		$this->default_controller = ( ! isset($this->routes['default_controller']) OR $this->routes['default_controller'] == '') ? FALSE : strtolower($this->routes['default_controller']);	
+		
 		// Fetch the complete URI string
 		$this->uri_string = $this->_get_uri_string();
 		
@@ -138,7 +139,6 @@ class CI_Router {
 		// Re-index the segment array so that it starts with 1 rather than 0
 		$this->_reindex_segments();
 	}
-	// END _set_route_mapping()
 	
 	// --------------------------------------------------------------------
 	
@@ -185,7 +185,6 @@ class CI_Router {
 		// identical to $this->segments
 		$this->rsegments = $segments;
 	}
-	// END _compile_segments()
 	
 	// --------------------------------------------------------------------
 	
@@ -240,7 +239,6 @@ class CI_Router {
 		// Can't find the requested controller...
 		show_404();	
 	}
-	// END _validate_segments()
 
 	// --------------------------------------------------------------------	
 	/**
@@ -280,7 +278,6 @@ class CI_Router {
 			unset($this->rsegments[0]);
 		}
 	}
-	// END _reindex_segments()
 	
 	// --------------------------------------------------------------------
 	
@@ -333,7 +330,6 @@ class CI_Router {
 			return getenv($uri);
 		}
 	}
-	// END _get_uri_string()
 
 	// --------------------------------------------------------------------
 	
@@ -381,7 +377,6 @@ class CI_Router {
 
 		return $parsed_uri;
 	}
-	// END _parse_request_uri()
 
 	// --------------------------------------------------------------------
 	
@@ -403,7 +398,6 @@ class CI_Router {
 		}	
 			return $str;
 	}
-	// END _filter_uri()
 	
 	// --------------------------------------------------------------------
 	
@@ -461,7 +455,6 @@ class CI_Router {
 		// matching route so we'll set the site default route
 		$this->_compile_segments($this->segments);
 	}
-	// END set_method()
 
 	// --------------------------------------------------------------------
 	
@@ -476,7 +469,6 @@ class CI_Router {
 	{
 		$this->class = $class;
 	}
-	// END set_class()
 	
 	// --------------------------------------------------------------------
 	
@@ -490,7 +482,6 @@ class CI_Router {
 	{
 		return $this->class;
 	}
-	// END fetch_class()
 	
 	// --------------------------------------------------------------------
 	
@@ -505,7 +496,6 @@ class CI_Router {
 	{
 		$this->method = $method;
 	}
-	// END set_method()
 
 	// --------------------------------------------------------------------
 	
@@ -519,7 +509,6 @@ class CI_Router {
 	{
 		return $this->method;
 	}
-	// END fetch_method()
 
 	// --------------------------------------------------------------------
 	
@@ -534,7 +523,6 @@ class CI_Router {
 	{
 		$this->directory = $dir.'/';
 	}
-	// END set_directory()
 
 	// --------------------------------------------------------------------
 	
@@ -548,7 +536,6 @@ class CI_Router {
 	{
 		return $this->directory;
 	}
-	// END fetch_directory()
 
 }
 // END Router Class
diff --git a/system/libraries/Session.php b/system/libraries/Session.php
index 76acbfea9..28e469da7 100644
--- a/system/libraries/Session.php
+++ b/system/libraries/Session.php
@@ -12,11 +12,6 @@
  * @since		Version 1.0
  * @filesource
  */
- 
-// INITIALIZE THE CLASS ---------------------------------------------------
-
-$obj =& get_instance();
-$obj->init_class('CI_Session');
 
 // ------------------------------------------------------------------------
 
diff --git a/system/libraries/Trackback.php b/system/libraries/Trackback.php
index 9b6138453..8b6cce16d 100644
--- a/system/libraries/Trackback.php
+++ b/system/libraries/Trackback.php
@@ -12,11 +12,6 @@
  * @since		Version 1.0
  * @filesource
  */
- 
-// INITIALIZE THE CLASS ---------------------------------------------------
-
-$obj =& get_instance();
-$obj->trackback =& new CI_Trackback();
 
 // ------------------------------------------------------------------------
 
diff --git a/system/libraries/URI.php b/system/libraries/URI.php
index 89ca42e44..80b112660 100644
--- a/system/libraries/URI.php
+++ b/system/libraries/URI.php
@@ -42,7 +42,7 @@ class CI_URI {
 	 */		
 	function CI_URI()
 	{
-		$this->router =& _load_class('CI_Router');	
+		$this->router =& _load_class('Router');	
 		log_message('debug', "URI Class Initialized");
 	}
 	
diff --git a/system/libraries/Unit_test.php b/system/libraries/Unit_test.php
index 04c3c199b..b2f4bf8cd 100644
--- a/system/libraries/Unit_test.php
+++ b/system/libraries/Unit_test.php
@@ -13,11 +13,6 @@
  * @filesource
  */
  
-// INITIALIZE THE CLASS ---------------------------------------------------
-
-$obj =& get_instance();
-$obj->init_class('CI_Unit_test');
-
 // ------------------------------------------------------------------------
 
 /**
diff --git a/system/libraries/Upload.php b/system/libraries/Upload.php
index 3a6a6fc34..091c6c30d 100644
--- a/system/libraries/Upload.php
+++ b/system/libraries/Upload.php
@@ -12,17 +12,6 @@
  * @since		Version 1.0
  * @filesource
  */
- 
-// INITIALIZE THE CLASS ---------------------------------------------------
-
-$config = array();
-if (file_exists(APPPATH.'config/upload'.EXT))
-{
-	include_once(APPPATH.'config/upload'.EXT);
-}
-
-$obj =& get_instance();
-$obj->init_class('CI_Upload', '', $config);
 
 // ------------------------------------------------------------------------
 
diff --git a/system/libraries/Validation.php b/system/libraries/Validation.php
index 34cacd5d8..80ee6a533 100644
--- a/system/libraries/Validation.php
+++ b/system/libraries/Validation.php
@@ -12,11 +12,6 @@
  * @since		Version 1.0
  * @filesource
  */
- 
-// INITIALIZE THE CLASS ---------------------------------------------------
-
-$obj =& get_instance();
-$obj->init_class('CI_Validation');
 
 // ------------------------------------------------------------------------
 
diff --git a/system/libraries/Xmlrpc.php b/system/libraries/Xmlrpc.php
index 24f79f2ba..f90785430 100644
--- a/system/libraries/Xmlrpc.php
+++ b/system/libraries/Xmlrpc.php
@@ -18,10 +18,6 @@ if ( ! function_exists('xml_parser_create'))
     show_error('Your PHP installation does not support XML');
 }
 
-// INITIALIZE THE CLASS ---------------------------------------------------
-
-$obj =& get_instance();
-$obj->init_class('CI_Xmlrpc');
 
 // ------------------------------------------------------------------------
 
diff --git a/system/libraries/Xmlrpcs.php b/system/libraries/Xmlrpcs.php
index f41437342..b47104857 100644
--- a/system/libraries/Xmlrpcs.php
+++ b/system/libraries/Xmlrpcs.php
@@ -23,11 +23,6 @@ if ( ! class_exists('CI_Xmlrpc'))
     show_error('You must load the Xmlrpc class before loading the Xmlrpcs class in order to create a server.');
 }
 
-// INITIALIZE THE CLASS ---------------------------------------------------
-
-$obj =& get_instance();
-$obj->init_class('CI_Xmlrpcs');
-
 // ------------------------------------------------------------------------
 
 /**
diff --git a/user_guide/general/controllers.html b/user_guide/general/controllers.html
index a197299d5..0bfe973e5 100644
--- a/user_guide/general/controllers.html
+++ b/user_guide/general/controllers.html
@@ -381,6 +381,7 @@ is a list of reserved names.  Do not name your controller functions any of these
 <li>_ci_init_scaffolding</li>

 <li>_ci_is_loaded</li>

 <li>_ci_load</li>

+<li>_ci_load_class</li>

 <li>_ci_scaffolding</li>

 <li>_ci_set_view_path</li>

 </ul>

diff --git a/user_guide/general/creating_libraries.html b/user_guide/general/creating_libraries.html
index b047838be..a2d40f95d 100644
--- a/user_guide/general/creating_libraries.html
+++ b/user_guide/general/creating_libraries.html
@@ -63,14 +63,27 @@ Creating Libraries
 <h1>Creating Libraries</h1>

 

 <p>When we use the term "Libraries" we are normally referring to the classes that are located in the <kbd>libraries</kbd>

-directory and described in the Class Reference of this user guide.  In this case, however, we will instead describe how you can create your own libraries within 

-your <dfn>application</dfn> directory in order to maintain separation between your local resources and the global framework resources.</p>

+directory and described in the Class Reference of this user guide.  In this case, however, we will instead describe how you can create 

+your own libraries within your <dfn>application/libraries</dfn> directory in order to maintain separation between your local resources 

+and the global framework resources.</p>

+

+<p>As an added bonus, Code Igniter permits your libraries to <kbd>extend</kbd> native classes if you simply need to add some functionality 

+to an existing library. Or you can even replace native libraries just by placing identically named versions in your <dfn>application/libraries</dfn> folder.

+

+<p>In summary:</p>

+

+<ul>

+<li>You can create entirely new libraries.</li>

+<li>You can extend native libraries.</li>

+<li>You can replace native libraries.</li>

+</ul>

+

+

 

 <h2>Storage</h2>

 

 <p>Your library classes should be placed within your <dfn>application/libraries</dfn> folder, as this is where Code Igniter will look for them when 

-they are initialized. If your class is named identically to a native class from the <dfn>system/libraries</dfn> folder, your version

-will be used instead.</p>

+they are initialized.</p>

 

 

 <h2>Naming Conventions</h2>

@@ -87,10 +100,6 @@ will be used instead.</p>
 <p>Classes should have this basic prototype (Note:  We are using the name <kbd>Myclass</kbd> purely as an example):</p>

 

 <code>&lt;?php  if (!defined('BASEPATH')) exit('No direct script access allowed');<br />

-<br />

-// Initialize the class<br />

-$obj =& get_instance();<br />

-$obj->init_class('Myclass');

 <br /><br />

 class Myclass {<br />

 <br />

@@ -101,15 +110,6 @@ class Myclass {<br />
 ?&gt;</code>

 

 

-<p>You'll notice in the above example that the class is instantiated directly from the file itself using these two lines of code:</p>

-

-<code>$obj =& get_instance();<br />

-$obj->init_class(<kbd>'Myclass'</kbd>);</code>

-

-<p class="important">Make sure and submit your class name in the first parameter of the <kbd>$obj->init_class()</kbd> function. In the

-above example it is <kbd>Myclass</kbd></p>

-

-

 <h2>Using Your Class</h2>

 

 <p>From within any of your <a href="controllers.html">Controller</a> functions you can initialize your class using the standard:</p>

@@ -124,22 +124,6 @@ Code Igniter doesn't care.</p>
 <code>$this-><kbd>myclass</kbd>->some_function();&nbsp; // Object instances will always be lower case

 </code>

 

-<h2>Setting a Different Class Variable Name</h2>

-

-

-<p>If you would like the object variable ($this->myclass) set to a different name you can specify it when initializing your class.  For

-example, let's initialize it as <kbd>foobar</kbd>:</p>

-

-<code>$obj =& get_instance();<br />

-$obj->init_class('Myclass', <kbd>'foobar'</kbd>);</code>

-

-<p>In the above example you would still load your class like this:</p>

-

-<code>$this->load->library('<kbd>Mclass</kbd>');</code>

-

-<p>But you would use it like this:<p>

-

-<code>$this-><kbd>foobar</kbd>->function();</code>

 

 

 <h2>Passing Parameters When Initializing Your Class</h2>

@@ -169,25 +153,7 @@ class Myclass {<br />
 }<br /><br />

 ?&gt;</code>

 

-<p>You can also pass parameters via the third parameter of the <dfn>$obj->init_class()</dfn> function:</p>

-

-<code>&lt;?php  if (!defined('BASEPATH')) exit('No direct script access allowed');<br />

-<br />

-

-$params = array('type' => 'large', 'color' => 'red');<br /><br />

-

-// Initialize the class<br />

-$obj =& get_instance();<br />

-$obj->init_class('Myclass', 'myclass', $params);

-<br /><br />

-class Myclass {<br />

-<br />

-&nbsp;&nbsp;&nbsp;&nbsp;function Myclass($params)<br />

-&nbsp;&nbsp;&nbsp;&nbsp;{<br />

-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;// Do something with $params<br />

-&nbsp;&nbsp;&nbsp;&nbsp;}<br />

-}<br /><br />

-?&gt;</code>

+<p>You can also pass parameters stored in a config file.  Simply create a config file named identically to the class filename.</p>