moving core library files out of libraries into new core folder

18 files changed, 5555 insertions, 0 deletions

diff --git a/system/core/Base4.php b/system/core/Base4.php
new file mode 100644
index 000000000..3561c2564
--- /dev/null
+++ b/system/core/Base4.php
@@ -0,0 +1,69 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		ExpressionEngine Dev Team
+ * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.3
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * CI_BASE - For PHP 4
+ *
+ * This file is used only when CodeIgniter is being run under PHP 4.
+ *
+ * In order to allow CI to work under PHP 4 we had to make the Loader class
+ * the parent of the Controller Base class.  It's the only way we can
+ * enable functions like $this->load->library('email') to instantiate
+ * classes that can then be used within controllers as $this->email->send()
+ *
+ * PHP 4 also has trouble referencing the CI super object within application
+ * constructors since objects do not exist until the class is fully
+ * instantiated.  Basically PHP 4 sucks...
+ *
+ * Since PHP 5 doesn't suffer from this problem so we load one of
+ * two files based on the version of PHP being run.
+ *
+ * @package		CodeIgniter
+ * @subpackage	codeigniter
+ * @category	front-controller
+ * @author		ExpressionEngine Dev Team
+ * @link		http://codeigniter.com/user_guide/
+ */
+ class CI_Base extends CI_Loader {
+
+	function CI_Base()
+	{
+		// This allows syntax like $this->load->foo() to work
+		parent::CI_Loader();
+		$this->load =& $this;
+		
+		// This allows resources used within controller constructors to work
+		global $OBJ;
+		$OBJ = $this->load; // Do NOT use a reference.
+	}
+}
+
+function &get_instance()
+{
+	global $CI, $OBJ;
+	
+	if (is_object($CI))
+	{
+		return $CI;
+	}
+	
+	return $OBJ->load;
+}
+
+
+/* End of file Base4.php */
+/* Location: ./system/codeigniter/Base4.php */
\ No newline at end of file
diff --git a/system/core/Base5.php b/system/core/Base5.php
new file mode 100644
index 000000000..5d944ae5a
--- /dev/null
+++ b/system/core/Base5.php
@@ -0,0 +1,56 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		ExpressionEngine Dev Team
+ * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.3
+ * @filesource
+ */
+
+
+// ------------------------------------------------------------------------
+
+/**
+ * CI_BASE - For PHP 5
+ *
+ * This file contains some code used only when CodeIgniter is being
+ * run under PHP 5.  It allows us to manage the CI super object more
+ * gracefully than what is possible with PHP 4.
+ *
+ * @package		CodeIgniter
+ * @subpackage	codeigniter
+ * @category	front-controller
+ * @author		ExpressionEngine Dev Team
+ * @link		http://codeigniter.com/user_guide/
+ */
+
+class CI_Base {
+
+	private static $instance;
+
+	public function CI_Base()
+	{
+		self::$instance =& $this;
+	}
+
+	public static function &get_instance()
+	{
+		return self::$instance;
+	}
+}
+
+function &get_instance()
+{
+	return CI_Base::get_instance();
+}
+
+
+
+/* End of file Base5.php */
+/* Location: ./system/codeigniter/Base5.php */
\ No newline at end of file
diff --git a/system/core/Benchmark.php b/system/core/Benchmark.php
new file mode 100644
index 000000000..d485ee21d
--- /dev/null
+++ b/system/core/Benchmark.php
@@ -0,0 +1,113 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		ExpressionEngine Dev Team
+ * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * CodeIgniter Benchmark Class
+ *
+ * This class enables you to mark points and calculate the time difference
+ * between them.  Memory consumption can also be displayed.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Libraries
+ * @category	Libraries
+ * @author		ExpressionEngine Dev Team
+ * @link		http://codeigniter.com/user_guide/libraries/benchmark.html
+ */
+class CI_Benchmark {
+
+	var $marker = array();
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Set a benchmark marker
+	 *
+	 * Multiple calls to this function can be made so that several
+	 * execution points can be timed
+	 *
+	 * @access	public
+	 * @param	string	$name	name of the marker
+	 * @return	void
+	 */
+	function mark($name)
+	{
+		$this->marker[$name] = microtime();
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Calculates the time difference between two marked points.
+	 *
+	 * If the first parameter is empty this function instead returns the
+	 * {elapsed_time} pseudo-variable. This permits the full system
+	 * execution time to be shown in a template. The output class will
+	 * swap the real value for this variable.
+	 *
+	 * @access	public
+	 * @param	string	a particular marked point
+	 * @param	string	a particular marked point
+	 * @param	integer	the number of decimal places
+	 * @return	mixed
+	 */
+	function elapsed_time($point1 = '', $point2 = '', $decimals = 4)
+	{
+		if ($point1 == '')
+		{
+			return '{elapsed_time}';
+		}
+
+		if ( ! isset($this->marker[$point1]))
+		{
+			return '';
+		}
+
+		if ( ! isset($this->marker[$point2]))
+		{
+			$this->marker[$point2] = microtime();
+		}
+	
+		list($sm, $ss) = explode(' ', $this->marker[$point1]);
+		list($em, $es) = explode(' ', $this->marker[$point2]);
+
+		return number_format(($em + $es) - ($sm + $ss), $decimals);
+	}
+ 	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Memory Usage
+	 *
+	 * This function returns the {memory_usage} pseudo-variable.
+	 * This permits it to be put it anywhere in a template
+	 * without the memory being calculated until the end.
+	 * The output class will swap the real value for this variable.
+	 *
+	 * @access	public
+	 * @return	string
+	 */
+	function memory_usage()
+	{
+		return '{memory_usage}';
+	}
+
+}
+
+// END CI_Benchmark class
+
+/* End of file Benchmark.php */
+/* Location: ./system/libraries/Benchmark.php */
\ No newline at end of file
diff --git a/system/core/CodeIgniter.php b/system/core/CodeIgniter.php
new file mode 100644
index 000000000..5d5bb144b
--- /dev/null
+++ b/system/core/CodeIgniter.php
@@ -0,0 +1,280 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		ExpressionEngine Dev Team
+ * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * System Front Controller
+ *
+ * Loads the base classes and executes the request.
+ *
+ * @package		CodeIgniter
+ * @subpackage	codeigniter
+ * @category	Front-controller
+ * @author		ExpressionEngine Dev Team
+ * @link		http://codeigniter.com/user_guide/
+ */
+
+// CI Version
+define('CI_VERSION',	'1.7.2');
+
+/*
+ * ------------------------------------------------------
+ *  Load the global functions
+ * ------------------------------------------------------
+ */
+require(BASEPATH.'codeigniter/Common'.EXT);
+
+/*
+ * ------------------------------------------------------
+ *  Load the compatibility override functions
+ * ------------------------------------------------------
+ */
+require(BASEPATH.'codeigniter/Compat'.EXT);
+
+/*
+ * ------------------------------------------------------
+ *  Load the framework constants
+ * ------------------------------------------------------
+ */
+require(APPPATH.'config/constants'.EXT);
+
+/*
+ * ------------------------------------------------------
+ *  Define a custom error handler so we can log PHP errors
+ * ------------------------------------------------------
+ */
+set_error_handler('_exception_handler');
+
+if ( ! is_php('5.3'))
+{
+	@set_magic_quotes_runtime(0); // Kill magic quotes
+}
+
+/*
+ * ------------------------------------------------------
+ *  Start the timer... tick tock tick tock...
+ * ------------------------------------------------------
+ */
+
+$BM =& load_class('Benchmark');
+$BM->mark('total_execution_time_start');
+$BM->mark('loading_time_base_classes_start');
+
+/*
+ * ------------------------------------------------------
+ *  Instantiate the hooks class
+ * ------------------------------------------------------
+ */
+
+$EXT =& load_class('Hooks');
+
+/*
+ * ------------------------------------------------------
+ *  Is there a "pre_system" hook?
+ * ------------------------------------------------------
+ */
+$EXT->_call_hook('pre_system');
+
+/*
+ * ------------------------------------------------------
+ *  Instantiate the base classes
+ * ------------------------------------------------------
+ */
+
+$CFG =& load_class('Config');
+$URI =& load_class('URI');
+$RTR =& load_class('Router');
+$OUT =& load_class('Output');
+
+/*
+ * ------------------------------------------------------
+ *	Is there a valid cache file?  If so, we're done...
+ * ------------------------------------------------------
+ */
+
+if ($EXT->_call_hook('cache_override') === FALSE)
+{
+	if ($OUT->_display_cache($CFG, $URI) == TRUE)
+	{
+		exit;
+	}
+}
+
+/*
+ * ------------------------------------------------------
+ *  Load the remaining base classes
+ * ------------------------------------------------------
+ */
+
+$IN		=& load_class('Input');
+$LANG	=& load_class('Language');
+
+/*
+ * ------------------------------------------------------
+ *  Load the app controller and local controller
+ * ------------------------------------------------------
+ *
+ *  Note: Due to the poor object handling in PHP 4 we'll
+ *  conditionally load different versions of the base
+ *  class.  Retaining PHP 4 compatibility requires a bit of a hack.
+ *
+ *  Note: The Loader class needs to be included first
+ *
+ */
+if ( ! is_php('5.0.0'))
+{
+	load_class('Loader', FALSE);
+	require(BASEPATH.'codeigniter/Base4'.EXT);
+}
+else
+{
+	require(BASEPATH.'codeigniter/Base5'.EXT);
+}
+
+// Load the base controller class
+load_class('Controller', FALSE);
+
+// Load the local application controller
+// Note: The Router class automatically validates the controller path.  If this include fails it 
+// means that the default controller in the Routes.php file is not resolving to something valid.
+if ( ! file_exists(APPPATH.'controllers/'.$RTR->fetch_directory().$RTR->fetch_class().EXT))
+{
+	show_error('Unable to load your default controller.  Please make sure the controller specified in your Routes.php file is valid.');
+}
+
+include(APPPATH.'controllers/'.$RTR->fetch_directory().$RTR->fetch_class().EXT);
+
+// Set a mark point for benchmarking
+$BM->mark('loading_time_base_classes_end');
+
+
+/*
+ * ------------------------------------------------------
+ *  Security check
+ * ------------------------------------------------------
+ *
+ *  None of the functions in the app controller or the
+ *  loader class can be called via the URI, nor can
+ *  controller functions that begin with an underscore
+ */
+$class  = $RTR->fetch_class();
+$method = $RTR->fetch_method();
+
+if ( ! class_exists($class)
+	OR $method == 'controller'
+	OR strncmp($method, '_', 1) == 0
+	OR in_array(strtolower($method), array_map('strtolower', get_class_methods('Controller')))
+	)
+{
+	show_404("{$class}/{$method}");
+}
+
+/*
+ * ------------------------------------------------------
+ *  Is there a "pre_controller" hook?
+ * ------------------------------------------------------
+ */
+$EXT->_call_hook('pre_controller');
+
+/*
+ * ------------------------------------------------------
+ *  Instantiate the controller and call requested method
+ * ------------------------------------------------------
+ */
+
+// Mark a start point so we can benchmark the controller
+$BM->mark('controller_execution_time_( '.$class.' / '.$method.' )_start');
+
+$CI = new $class();
+
+// Is this a scaffolding request?
+if ($RTR->scaffolding_request === TRUE)
+{
+	if ($EXT->_call_hook('scaffolding_override') === FALSE)
+	{
+		$CI->_ci_scaffolding();
+	}
+}
+else
+{
+	/*
+	 * ------------------------------------------------------
+	 *  Is there a "post_controller_constructor" hook?
+	 * ------------------------------------------------------
+	 */
+	$EXT->_call_hook('post_controller_constructor');
+	
+	// Is there a "remap" function?
+	if (method_exists($CI, '_remap'))
+	{
+		$CI->_remap($method);
+	}
+	else
+	{
+		// is_callable() returns TRUE on some versions of PHP 5 for private and protected
+		// methods, so we'll use this workaround for consistent behavior
+		if ( ! in_array(strtolower($method), array_map('strtolower', get_class_methods($CI))))
+		{
+			show_404("{$class}/{$method}");
+		}
+
+		// Call the requested method.
+		// Any URI segments present (besides the class/function) will be passed to the method for convenience
+		call_user_func_array(array(&$CI, $method), array_slice($URI->rsegments, 2));
+	}
+}
+
+// Mark a benchmark end point
+$BM->mark('controller_execution_time_( '.$class.' / '.$method.' )_end');
+
+/*
+ * ------------------------------------------------------
+ *  Is there a "post_controller" hook?
+ * ------------------------------------------------------
+ */
+$EXT->_call_hook('post_controller');
+
+/*
+ * ------------------------------------------------------
+ *  Send the final rendered output to the browser
+ * ------------------------------------------------------
+ */
+
+if ($EXT->_call_hook('display_override') === FALSE)
+{
+	$OUT->_display();
+}
+
+/*
+ * ------------------------------------------------------
+ *  Is there a "post_system" hook?
+ * ------------------------------------------------------
+ */
+$EXT->_call_hook('post_system');
+
+/*
+ * ------------------------------------------------------
+ *  Close the DB connection if one exists
+ * ------------------------------------------------------
+ */
+if (class_exists('CI_DB') AND isset($CI->db))
+{
+	$CI->db->close();
+}
+
+
+/* End of file CodeIgniter.php */
+/* Location: ./system/codeigniter/CodeIgniter.php */
\ No newline at end of file
diff --git a/system/core/Common.php b/system/core/Common.php
new file mode 100644
index 000000000..9a35062a4
--- /dev/null
+++ b/system/core/Common.php
@@ -0,0 +1,421 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		ExpressionEngine Dev Team
+ * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+* Determines if the current version of PHP is greater then the supplied value
+*
+* Since there are a few places where we conditionally test for PHP > 5
+* we'll set a static variable.
+*
+* @access	public
+* @param	string
+* @return	bool
+*/
+function is_php($version = '5.0.0')
+{
+	static $_is_php;
+	$version = (string)$version;
+	
+	if ( ! isset($_is_php[$version]))
+	{
+		$_is_php[$version] = (version_compare(PHP_VERSION, $version) < 0) ? FALSE : TRUE;
+	}
+
+	return $_is_php[$version];
+}
+
+// ------------------------------------------------------------------------
+
+/**
+ * Tests for file writability
+ *
+ * is_writable() returns TRUE on Windows servers when you really can't write to 
+ * the file, based on the read-only attribute.  is_writable() is also unreliable
+ * on Unix servers if safe_mode is on. 
+ *
+ * @access	private
+ * @return	void
+ */
+function is_really_writable($file)
+{	
+	// If we're on a Unix server with safe_mode off we call is_writable
+	if (DIRECTORY_SEPARATOR == '/' AND @ini_get("safe_mode") == FALSE)
+	{
+		return is_writable($file);
+	}
+
+	// For windows servers and safe_mode "on" installations we'll actually
+	// write a file then read it.  Bah...
+	if (is_dir($file))
+	{
+		$file = rtrim($file, '/').'/'.md5(mt_rand(1,100).mt_rand(1,100));
+
+		if (($fp = @fopen($file, FOPEN_WRITE_CREATE)) === FALSE)
+		{
+			return FALSE;
+		}
+
+		fclose($fp);
+		@chmod($file, DIR_WRITE_MODE);
+		@unlink($file);
+		return TRUE;
+	}
+	elseif (($fp = @fopen($file, FOPEN_WRITE_CREATE)) === FALSE)
+	{
+		return FALSE;
+	}
+
+	fclose($fp);
+	return TRUE;
+}
+
+// ------------------------------------------------------------------------
+
+/**
+* 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
+* @param	string	the class name being requested
+* @param	bool	optional flag that lets classes get loaded but not instantiated
+* @return	object
+*/
+function &load_class($class, $instantiate = TRUE)
+{
+	static $objects = array();
+
+	// Does the class exist?  If so, we're done...
+	if (isset($objects[$class]))
+	{
+		return $objects[$class];
+	}
+
+	// If the requested class does not exist in the application/libraries
+	// folder we'll load the native class from the system/libraries folder.	
+	if (file_exists(APPPATH.'libraries/'.config_item('subclass_prefix').$class.EXT))
+	{
+		require(BASEPATH.'libraries/'.$class.EXT);
+		require(APPPATH.'libraries/'.config_item('subclass_prefix').$class.EXT);
+		$is_subclass = TRUE;
+	}
+	else
+	{
+		if (file_exists(APPPATH.'libraries/'.$class.EXT))
+		{
+			require(APPPATH.'libraries/'.$class.EXT);
+			$is_subclass = FALSE;
+		}
+		else
+		{
+			require(BASEPATH.'libraries/'.$class.EXT);
+			$is_subclass = FALSE;
+		}
+	}
+
+	if ($instantiate == FALSE)
+	{
+		$objects[$class] = TRUE;
+		return $objects[$class];
+	}
+
+	if ($is_subclass == TRUE)
+	{
+		$name = config_item('subclass_prefix').$class;
+
+		$objects[$class] =& instantiate_class(new $name());
+		return $objects[$class];
+	}
+
+	$name = ($class != 'Controller') ? 'CI_'.$class : $class;
+
+	$objects[$class] =& instantiate_class(new $name());
+	return $objects[$class];
+}
+
+/**
+ * Instantiate Class
+ *
+ * Returns a new class object by reference, used by load_class() and the DB class.
+ * Required to retain PHP 4 compatibility and also not make PHP 5.3 cry.
+ *
+ * Use: $obj =& instantiate_class(new Foo());
+ * 
+ * @access	public
+ * @param	object
+ * @return	object
+ */
+function &instantiate_class(&$class_object)
+{
+	return $class_object;
+}
+
+/**
+* Loads the main config.php file
+*
+* @access	private
+* @return	array
+*/
+function &get_config()
+{
+	static $main_conf;
+
+	if ( ! isset($main_conf))
+	{
+		if ( ! file_exists(APPPATH.'config/config'.EXT))
+		{
+			exit('The configuration file config'.EXT.' does not exist.');
+		}
+
+		require(APPPATH.'config/config'.EXT);
+
+		if ( ! isset($config) OR ! is_array($config))
+		{
+			exit('Your config file does not appear to be formatted correctly.');
+		}
+
+		$main_conf[0] =& $config;
+	}
+	return $main_conf[0];
+}
+
+/**
+* Gets a config item
+*
+* @access	public
+* @return	mixed
+*/
+function config_item($item)
+{
+	static $config_item = array();
+
+	if ( ! isset($config_item[$item]))
+	{
+		$config =& get_config();
+
+		if ( ! isset($config[$item]))
+		{
+			return FALSE;
+		}
+		$config_item[$item] = $config[$item];
+	}
+
+	return $config_item[$item];
+}
+
+
+/**
+* Error Handler
+*
+* This function lets us invoke the exception class and
+* display errors using the standard error template located
+* in application/errors/errors.php
+* This function will send the error page directly to the
+* browser and exit.
+*
+* @access	public
+* @return	void
+*/
+function show_error($message, $status_code = 500)
+{
+	$error =& load_class('Exceptions');
+	echo $error->show_error('An Error Was Encountered', $message, 'error_general', $status_code);
+	exit;
+}
+
+
+/**
+* 404 Page Handler
+*
+* This function is similar to the show_error() function above
+* However, instead of the standard error template it displays
+* 404 errors.
+*
+* @access	public
+* @return	void
+*/
+function show_404($page = '')
+{
+	$error =& load_class('Exceptions');
+	$error->show_404($page);
+	exit;
+}
+
+
+/**
+* Error Logging Interface
+*
+* We use this as a simple mechanism to access the logging
+* class and send messages to be logged.
+*
+* @access	public
+* @return	void
+*/
+function log_message($level = 'error', $message, $php_error = FALSE)
+{
+	static $LOG;
+	
+	$config =& get_config();
+	if ($config['log_threshold'] == 0)
+	{
+		return;
+	}
+
+	$LOG =& load_class('Log');
+	$LOG->write_log($level, $message, $php_error);
+}
+
+
+/**
+ * Set HTTP Status Header
+ *
+ * @access	public
+ * @param	int 	the status code
+ * @param	string	
+ * @return	void
+ */
+function set_status_header($code = 200, $text = '')
+{
+	$stati = array(
+						200	=> 'OK',
+						201	=> 'Created',
+						202	=> 'Accepted',
+						203	=> 'Non-Authoritative Information',
+						204	=> 'No Content',
+						205	=> 'Reset Content',
+						206	=> 'Partial Content',
+
+						300	=> 'Multiple Choices',
+						301	=> 'Moved Permanently',
+						302	=> 'Found',
+						304	=> 'Not Modified',
+						305	=> 'Use Proxy',
+						307	=> 'Temporary Redirect',
+
+						400	=> 'Bad Request',
+						401	=> 'Unauthorized',
+						403	=> 'Forbidden',
+						404	=> 'Not Found',
+						405	=> 'Method Not Allowed',
+						406	=> 'Not Acceptable',
+						407	=> 'Proxy Authentication Required',
+						408	=> 'Request Timeout',
+						409	=> 'Conflict',
+						410	=> 'Gone',
+						411	=> 'Length Required',
+						412	=> 'Precondition Failed',
+						413	=> 'Request Entity Too Large',
+						414	=> 'Request-URI Too Long',
+						415	=> 'Unsupported Media Type',
+						416	=> 'Requested Range Not Satisfiable',
+						417	=> 'Expectation Failed',
+
+						500	=> 'Internal Server Error',
+						501	=> 'Not Implemented',
+						502	=> 'Bad Gateway',
+						503	=> 'Service Unavailable',
+						504	=> 'Gateway Timeout',
+						505	=> 'HTTP Version Not Supported'
+					);
+
+	if ($code == '' OR ! is_numeric($code))
+	{
+		show_error('Status codes must be numeric', 500);
+	}
+
+	if (isset($stati[$code]) AND $text == '')
+	{				
+		$text = $stati[$code];
+	}
+	
+	if ($text == '')
+	{
+		show_error('No status text available.  Please check your status code number or supply your own message text.', 500);
+	}
+	
+	$server_protocol = (isset($_SERVER['SERVER_PROTOCOL'])) ? $_SERVER['SERVER_PROTOCOL'] : FALSE;
+
+	if (substr(php_sapi_name(), 0, 3) == 'cgi')
+	{
+		header("Status: {$code} {$text}", TRUE);
+	}
+	elseif ($server_protocol == 'HTTP/1.1' OR $server_protocol == 'HTTP/1.0')
+	{
+		header($server_protocol." {$code} {$text}", TRUE, $code);
+	}
+	else
+	{
+		header("HTTP/1.1 {$code} {$text}", TRUE, $code);
+	}
+}
+
+
+/**
+* Exception Handler
+*
+* This is the custom exception handler that is declaired at the top
+* of Codeigniter.php.  The main reason we use this is permit
+* PHP errors to be logged in our own log files since we may
+* not have access to server logs. Since this function
+* effectively intercepts PHP errors, however, we also need
+* to display errors based on the current error_reporting level.
+* We do that with the use of a PHP error template.
+*
+* @access	private
+* @return	void
+*/
+function _exception_handler($severity, $message, $filepath, $line)
+{	
+	 // We don't bother with "strict" notices since they will fill up
+	 // the log file with information that isn't normally very
+	 // helpful.  For example, if you are running PHP 5 and you
+	 // use version 4 style class functions (without prefixes
+	 // like "public", "private", etc.) you'll get notices telling
+	 // you that these have been deprecated.
+	
+	if ($severity == E_STRICT)
+	{
+		return;
+	}
+
+	$error =& load_class('Exceptions');
+
+	// Should we display the error?
+	// We'll get the current error_reporting level and add its bits
+	// with the severity bits to find out.
+	
+	if (($severity & error_reporting()) == $severity)
+	{
+		$error->show_php_error($severity, $message, $filepath, $line);
+	}
+	
+	// Should we log the error?  No?  We're done...
+	$config =& get_config();
+	if ($config['log_threshold'] == 0)
+	{
+		return;
+	}
+
+	$error->log_exception($severity, $message, $filepath, $line);
+}
+
+
+
+/* End of file Common.php */
+/* Location: ./system/codeigniter/Common.php */
\ No newline at end of file
diff --git a/system/core/Compat.php b/system/core/Compat.php
new file mode 100644
index 000000000..40017a93b
--- /dev/null
+++ b/system/core/Compat.php
@@ -0,0 +1,93 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		ExpressionEngine Dev Team
+ * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * Compatibility Functions
+ *
+ * Function overrides for older versions of PHP or PHP environments missing
+ * certain extensions / libraries
+ *
+ * @package		CodeIgniter
+ * @subpackage	codeigniter
+ * @category	Compatibility Functions
+ * @author		ExpressionEngine Development Team
+ * @link		http://codeigniter.com/user_guide/
+ */
+
+// ------------------------------------------------------------------------
+
+/*
+ * PHP versions prior to 5.0 don't support the E_STRICT constant
+ * so we need to explicitly define it otherwise the Exception class 
+ * will generate errors when running under PHP 4
+ *
+ */
+if ( ! defined('E_STRICT'))
+{
+	define('E_STRICT', 2048);
+}
+
+/**
+ * ctype_digit()
+ *
+ * Determines if a string is comprised only of digits
+ * http://us.php.net/manual/en/function.ctype_digit.php
+ *
+ * @access	public
+ * @param	string
+ * @return	bool
+ */
+if ( ! function_exists('ctype_digit'))
+{
+	function ctype_digit($str)
+	{
+		if ( ! is_string($str) OR $str == '')
+		{
+			return FALSE;
+		}
+		
+		return ! preg_match('/[^0-9]/', $str);
+	}	
+}
+
+// --------------------------------------------------------------------
+
+/**
+ * ctype_alnum()
+ *
+ * Determines if a string is comprised of only alphanumeric characters
+ * http://us.php.net/manual/en/function.ctype-alnum.php
+ *
+ * @access	public
+ * @param	string
+ * @return	bool
+ */
+if ( ! function_exists('ctype_alnum'))
+{
+	function ctype_alnum($str)
+	{
+		if ( ! is_string($str) OR $str == '')
+		{
+			return FALSE;
+		}
+		
+		return ! preg_match('/[^0-9a-z]/i', $str);
+	}	
+}
+
+/* End of file Compat.php */
+/* Location: ./system/codeigniter/Compat.php */
\ No newline at end of file
diff --git a/system/core/Config.php b/system/core/Config.php
new file mode 100644
index 000000000..760120779
--- /dev/null
+++ b/system/core/Config.php
@@ -0,0 +1,244 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		ExpressionEngine Dev Team
+ * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * CodeIgniter Config Class
+ *
+ * This class contains functions that enable config files to be managed
+ *
+ * @package		CodeIgniter
+ * @subpackage	Libraries
+ * @category	Libraries
+ * @author		ExpressionEngine Dev Team
+ * @link		http://codeigniter.com/user_guide/libraries/config.html
+ */
+class CI_Config {
+
+	var $config = array();
+	var $is_loaded = array();
+
+	/**
+	 * Constructor
+	 *
+	 * Sets the $config data from the primary config.php file as a class variable
+	 *
+	 * @access   public
+	 * @param   string	the config file name
+	 * @param   boolean  if configuration values should be loaded into their own section
+	 * @param   boolean  true if errors should just return false, false if an error message should be displayed
+	 * @return  boolean  if the file was successfully loaded or not
+	 */
+	function CI_Config()
+	{
+		$this->config =& get_config();
+		log_message('debug', "Config Class Initialized");
+	}
+  	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Load Config File
+	 *
+	 * @access	public
+	 * @param	string	the config file name
+	 * @return	boolean	if the file was loaded correctly
+	 */	
+	function load($file = '', $use_sections = FALSE, $fail_gracefully = FALSE)
+	{
+		$file = ($file == '') ? 'config' : str_replace(EXT, '', $file);
+	
+		if (in_array($file, $this->is_loaded, TRUE))
+		{
+			return TRUE;
+		}
+
+		if ( ! file_exists(APPPATH.'config/'.$file.EXT))
+		{
+			if ($fail_gracefully === TRUE)
+			{
+				return FALSE;
+			}
+			show_error('The configuration file '.$file.EXT.' does not exist.');
+		}
+	
+		include(APPPATH.'config/'.$file.EXT);
+
+		if ( ! isset($config) OR ! is_array($config))
+		{
+			if ($fail_gracefully === TRUE)
+			{
+				return FALSE;
+			}
+			show_error('Your '.$file.EXT.' file does not appear to contain a valid configuration array.');
+		}
+
+		if ($use_sections === TRUE)
+		{
+			if (isset($this->config[$file]))
+			{
+				$this->config[$file] = array_merge($this->config[$file], $config);
+			}
+			else
+			{
+				$this->config[$file] = $config;
+			}
+		}
+		else
+		{
+			$this->config = array_merge($this->config, $config);
+		}
+
+		$this->is_loaded[] = $file;
+		unset($config);
+
+		log_message('debug', 'Config file loaded: config/'.$file.EXT);
+		return TRUE;
+	}
+  	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Fetch a config file item
+	 *
+	 *
+	 * @access	public
+	 * @param	string	the config item name
+	 * @param	string	the index name
+	 * @param	bool
+	 * @return	string
+	 */
+	function item($item, $index = '')
+	{	
+		if ($index == '')
+		{	
+			if ( ! isset($this->config[$item]))
+			{
+				return FALSE;
+			}
+
+			$pref = $this->config[$item];
+		}
+		else
+		{
+			if ( ! isset($this->config[$index]))
+			{
+				return FALSE;
+			}
+
+			if ( ! isset($this->config[$index][$item]))
+			{
+				return FALSE;
+			}
+
+			$pref = $this->config[$index][$item];
+		}
+
+		return $pref;
+	}
+  	
+  	// --------------------------------------------------------------------
+
+	/**
+	 * Fetch a config file item - adds slash after item
+	 *
+	 * The second parameter allows a slash to be added to the end of
+	 * the item, in the case of a path.
+	 *
+	 * @access	public
+	 * @param	string	the config item name
+	 * @param	bool
+	 * @return	string
+	 */
+	function slash_item($item)
+	{
+		if ( ! isset($this->config[$item]))
+		{
+			return FALSE;
+		}
+
+		$pref = $this->config[$item];
+
+		if ($pref != '' && substr($pref, -1) != '/')
+		{	
+			$pref .= '/';
+		}
+
+		return $pref;
+	}
+  	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Site URL
+	 *
+	 * @access	public
+	 * @param	string	the URI string
+	 * @return	string
+	 */
+	function site_url($uri = '')
+	{
+		if (is_array($uri))
+		{
+			$uri = implode('/', $uri);
+		}
+
+		if ($uri == '')
+		{
+			return $this->slash_item('base_url').$this->item('index_page');
+		}
+		else
+		{
+			$suffix = ($this->item('url_suffix') == FALSE) ? '' : $this->item('url_suffix');
+			return $this->slash_item('base_url').$this->slash_item('index_page').trim($uri, '/').$suffix; 
+		}
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * System URL
+	 *
+	 * @access	public
+	 * @return	string
+	 */
+	function system_url()
+	{
+		$x = explode("/", preg_replace("|/*(.+?)/*$|", "\\1", BASEPATH));
+		return $this->slash_item('base_url').end($x).'/';
+	}
+  	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Set a config file item
+	 *
+	 * @access	public
+	 * @param	string	the config item key
+	 * @param	string	the config item value
+	 * @return	void
+	 */
+	function set_item($item, $value)
+	{
+		$this->config[$item] = $value;
+	}
+
+}
+
+// END CI_Config class
+
+/* End of file Config.php */
+/* Location: ./system/libraries/Config.php */
\ No newline at end of file
diff --git a/system/core/Controller.php b/system/core/Controller.php
new file mode 100644
index 000000000..c5637c951
--- /dev/null
+++ b/system/core/Controller.php
@@ -0,0 +1,127 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		ExpressionEngine Dev Team
+ * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * CodeIgniter Application Controller Class
+ *
+ * This class object is the super class that every library in
+ * CodeIgniter will be assigned to.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Libraries
+ * @category	Libraries
+ * @author		ExpressionEngine Dev Team
+ * @link		http://codeigniter.com/user_guide/general/controllers.html
+ */
+class Controller extends CI_Base {
+
+	var $_ci_scaffolding	= FALSE;
+	var $_ci_scaff_table	= FALSE;
+	
+	/**
+	 * Constructor
+	 *
+	 * Calls the initialize() function
+	 */
+	function Controller()
+	{	
+		parent::CI_Base();
+		$this->_ci_initialize();
+		log_message('debug', "Controller Class Initialized");
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Initialize
+	 *
+	 * Assigns all the bases classes loaded by the front controller to
+	 * variables in this class.  Also calls the autoload routine.
+	 *
+	 * @access	private
+	 * @return	void
+	 */
+	function _ci_initialize()
+	{
+		// Assign all the class objects that were instantiated by the
+		// front controller to local class variables so that CI can be
+		// run as one big super object.
+		$classes = array(
+							'config'	=> 'Config',
+							'input'		=> 'Input',
+							'benchmark'	=> 'Benchmark',
+							'uri'		=> 'URI',
+							'output'	=> 'Output',
+							'lang'		=> 'Language',
+							'router'	=> 'Router'
+							);
+		
+		foreach ($classes as $var => $class)
+		{
+			$this->$var =& load_class($class);
+		}
+
+		// In PHP 5 the Loader class is run as a discreet
+		// class.  In PHP 4 it extends the Controller
+		if (floor(phpversion()) >= 5)
+		{
+			$this->load =& load_class('Loader');
+			$this->load->_ci_autoloader();
+		}
+		else
+		{
+			$this->_ci_autoloader();
+			
+			// sync up the objects since PHP4 was working from a copy
+			foreach (array_keys(get_object_vars($this)) as $attribute)
+			{
+				if (is_object($this->$attribute))
+				{
+					$this->load->$attribute =& $this->$attribute;
+				}
+			}
+		}
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Run Scaffolding
+	 *
+	 * @access	private
+	 * @return	void
+	 */	
+	function _ci_scaffolding()
+	{
+		if ($this->_ci_scaffolding === FALSE OR $this->_ci_scaff_table === FALSE)
+		{
+			show_404('Scaffolding unavailable');
+		}
+		
+		$method = ( ! in_array($this->uri->segment(3), array('add', 'insert', 'edit', 'update', 'view', 'delete', 'do_delete'), TRUE)) ? 'view' : $this->uri->segment(3);
+		
+		require_once(BASEPATH.'scaffolding/Scaffolding'.EXT);
+		$scaff = new Scaffolding($this->_ci_scaff_table);
+		$scaff->$method();
+	}
+
+
+}
+// END _Controller class
+
+/* End of file Controller.php */
+/* Location: ./system/libraries/Controller.php */
\ No newline at end of file
diff --git a/system/core/Exceptions.php b/system/core/Exceptions.php
new file mode 100644
index 000000000..bd567ccdc
--- /dev/null
+++ b/system/core/Exceptions.php
@@ -0,0 +1,174 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		ExpressionEngine Dev Team
+ * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * Exceptions Class
+ *
+ * @package		CodeIgniter
+ * @subpackage	Libraries
+ * @category	Exceptions
+ * @author		ExpressionEngine Dev Team
+ * @link		http://codeigniter.com/user_guide/libraries/exceptions.html
+ */
+class CI_Exceptions {
+	var $action;
+	var $severity;
+	var $message;
+	var $filename;
+	var $line;
+	var $ob_level;
+
+	var $levels = array(
+						E_ERROR				=>	'Error',
+						E_WARNING			=>	'Warning',
+						E_PARSE				=>	'Parsing Error',
+						E_NOTICE			=>	'Notice',
+						E_CORE_ERROR		=>	'Core Error',
+						E_CORE_WARNING		=>	'Core Warning',
+						E_COMPILE_ERROR		=>	'Compile Error',
+						E_COMPILE_WARNING	=>	'Compile Warning',
+						E_USER_ERROR		=>	'User Error',
+						E_USER_WARNING		=>	'User Warning',
+						E_USER_NOTICE		=>	'User Notice',
+						E_STRICT			=>	'Runtime Notice'
+					);
+
+
+	/**
+	 * Constructor
+	 *
+	 */	
+	function CI_Exceptions()
+	{
+		$this->ob_level = ob_get_level();
+		// Note:  Do not log messages from this constructor.
+	}
+  	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Exception Logger
+	 *
+	 * This function logs PHP generated error messages
+	 *
+	 * @access	private
+	 * @param	string	the error severity
+	 * @param	string	the error string
+	 * @param	string	the error filepath
+	 * @param	string	the error line number
+	 * @return	string
+	 */
+	function log_exception($severity, $message, $filepath, $line)
+	{	
+		$severity = ( ! isset($this->levels[$severity])) ? $severity : $this->levels[$severity];
+		
+		log_message('error', 'Severity: '.$severity.'  --> '.$message. ' '.$filepath.' '.$line, TRUE);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * 404 Page Not Found Handler
+	 *
+	 * @access	private
+	 * @param	string
+	 * @return	string
+	 */
+	function show_404($page = '')
+	{	
+		$heading = "404 Page Not Found";
+		$message = "The page you requested was not found.";
+
+		log_message('error', '404 Page Not Found --> '.$page);
+		echo $this->show_error($heading, $message, 'error_404', 404);
+		exit;
+	}
+  	
+	// --------------------------------------------------------------------
+
+	/**
+	 * General Error Page
+	 *
+	 * This function takes an error message as input
+	 * (either as a string or an array) and displays
+	 * it using the specified template.
+	 *
+	 * @access	private
+	 * @param	string	the heading
+	 * @param	string	the message
+	 * @param	string	the template name
+	 * @return	string
+	 */
+	function show_error($heading, $message, $template = 'error_general', $status_code = 500)
+	{
+		set_status_header($status_code);
+		
+		$message = '<p>'.implode('</p><p>', ( ! is_array($message)) ? array($message) : $message).'</p>';
+
+		if (ob_get_level() > $this->ob_level + 1)
+		{
+			ob_end_flush();	
+		}
+		ob_start();
+		include(APPPATH.'errors/'.$template.EXT);
+		$buffer = ob_get_contents();
+		ob_end_clean();
+		return $buffer;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Native PHP error handler
+	 *
+	 * @access	private
+	 * @param	string	the error severity
+	 * @param	string	the error string
+	 * @param	string	the error filepath
+	 * @param	string	the error line number
+	 * @return	string
+	 */
+	function show_php_error($severity, $message, $filepath, $line)
+	{	
+		$severity = ( ! isset($this->levels[$severity])) ? $severity : $this->levels[$severity];
+	
+		$filepath = str_replace("\\", "/", $filepath);
+		
+		// For safety reasons we do not show the full file path
+		if (FALSE !== strpos($filepath, '/'))
+		{
+			$x = explode('/', $filepath);
+			$filepath = $x[count($x)-2].'/'.end($x);
+		}
+		
+		if (ob_get_level() > $this->ob_level + 1)
+		{
+			ob_end_flush();	
+		}
+		ob_start();
+		include(APPPATH.'errors/error_php'.EXT);
+		$buffer = ob_get_contents();
+		ob_end_clean();
+		echo $buffer;
+	}
+
+
+}
+// END Exceptions Class
+
+/* End of file Exceptions.php */
+/* Location: ./system/libraries/Exceptions.php */
\ No newline at end of file
diff --git a/system/core/Hooks.php b/system/core/Hooks.php
new file mode 100644
index 000000000..6d736c3f6
--- /dev/null
+++ b/system/core/Hooks.php
@@ -0,0 +1,226 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		ExpressionEngine Dev Team
+ * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * CodeIgniter Hooks Class
+ *
+ * Provides a mechanism to extend the base system without hacking.  Most of
+ * this class is borrowed from Paul's Extension class in ExpressionEngine.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Libraries
+ * @category	Libraries
+ * @author		ExpressionEngine Dev Team
+ * @link		http://codeigniter.com/user_guide/libraries/encryption.html
+ */
+class CI_Hooks {
+
+	var $enabled 		= FALSE;
+	var $hooks   		= array();
+	var $in_progress	= FALSE;
+
+	/**
+	 * Constructor
+	 *
+	 */
+	function CI_Hooks()
+	{
+		$this->_initialize();
+		log_message('debug', "Hooks Class Initialized");
+	}
+  
+	// --------------------------------------------------------------------
+
+	/**
+	 * Initialize the Hooks Preferences
+	 *
+	 * @access	private
+	 * @return	void
+	 */  
+  	function _initialize()
+  	{
+		$CFG =& load_class('Config');
+
+		// If hooks are not enabled in the config file
+		// there is nothing else to do
+
+		if ($CFG->item('enable_hooks') == FALSE)
+		{
+			return;
+		}
+
+		// Grab the "hooks" definition file.
+		// If there are no hooks, we're done.
+
+		@include(APPPATH.'config/hooks'.EXT);
+
+		if ( ! isset($hook) OR ! is_array($hook))
+		{
+			return;
+		}
+
+		$this->hooks =& $hook;
+		$this->enabled = TRUE;
+  	}
+  
+	// --------------------------------------------------------------------
+
+	/**
+	 * Call Hook
+	 *
+	 * Calls a particular hook
+	 *
+	 * @access	private
+	 * @param	string	the hook name
+	 * @return	mixed
+	 */
+	function _call_hook($which = '')
+	{
+		if ( ! $this->enabled OR ! isset($this->hooks[$which]))
+		{
+			return FALSE;
+		}
+
+		if (isset($this->hooks[$which][0]) AND is_array($this->hooks[$which][0]))
+		{
+			foreach ($this->hooks[$which] as $val)
+			{
+				$this->_run_hook($val);
+			}
+		}
+		else
+		{
+			$this->_run_hook($this->hooks[$which]);
+		}
+
+		return TRUE;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Run Hook
+	 *
+	 * Runs a particular hook
+	 *
+	 * @access	private
+	 * @param	array	the hook details
+	 * @return	bool
+	 */
+	function _run_hook($data)
+	{
+		if ( ! is_array($data))
+		{
+			return FALSE;
+		}
+
+		// -----------------------------------
+		// Safety - Prevents run-away loops
+		// -----------------------------------
+
+		// If the script being called happens to have the same
+		// hook call within it a loop can happen
+
+		if ($this->in_progress == TRUE)
+		{
+			return;
+		}
+
+		// -----------------------------------
+		// Set file path
+		// -----------------------------------
+
+		if ( ! isset($data['filepath']) OR ! isset($data['filename']))
+		{
+			return FALSE;
+		}
+
+		$filepath = APPPATH.$data['filepath'].'/'.$data['filename'];
+
+		if ( ! file_exists($filepath))
+		{
+			return FALSE;
+		}
+
+		// -----------------------------------
+		// Set class/function name
+		// -----------------------------------
+
+		$class		= FALSE;
+		$function	= FALSE;
+		$params		= '';
+
+		if (isset($data['class']) AND $data['class'] != '')
+		{
+			$class = $data['class'];
+		}
+
+		if (isset($data['function']))
+		{
+			$function = $data['function'];
+		}
+
+		if (isset($data['params']))
+		{
+			$params = $data['params'];
+		}
+
+		if ($class === FALSE AND $function === FALSE)
+		{
+			return FALSE;
+		}
+
+		// -----------------------------------
+		// Set the in_progress flag
+		// -----------------------------------
+
+		$this->in_progress = TRUE;
+
+		// -----------------------------------
+		// Call the requested class and/or function
+		// -----------------------------------
+
+		if ($class !== FALSE)
+		{
+			if ( ! class_exists($class))
+			{
+				require($filepath);
+			}
+
+			$HOOK = new $class;
+			$HOOK->$function($params);
+		}
+		else
+		{
+			if ( ! function_exists($function))
+			{
+				require($filepath);
+			}
+
+			$function($params);
+		}
+
+		$this->in_progress = FALSE;
+		return TRUE;
+	}
+
+}
+
+// END CI_Hooks class
+
+/* End of file Hooks.php */
+/* Location: ./system/libraries/Hooks.php */
\ No newline at end of file
diff --git a/system/core/Input.php b/system/core/Input.php
new file mode 100644
index 000000000..e736d2b8b
--- /dev/null
+++ b/system/core/Input.php
@@ -0,0 +1,1067 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		ExpressionEngine Dev Team
+ * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * Input Class
+ *
+ * Pre-processes global input data for security
+ *
+ * @package		CodeIgniter
+ * @subpackage	Libraries
+ * @category	Input
+ * @author		ExpressionEngine Dev Team
+ * @link		http://codeigniter.com/user_guide/libraries/input.html
+ */
+class CI_Input {
+	var $use_xss_clean		= FALSE;
+	var $xss_hash			= '';
+	var $ip_address			= FALSE;
+	var $user_agent			= FALSE;
+	var $allow_get_array	= FALSE;
+
+	/* never allowed, string replacement */
+	var $never_allowed_str = array(
+									'document.cookie'	=> '[removed]',
+									'document.write'	=> '[removed]',
+									'.parentNode'		=> '[removed]',
+									'.innerHTML'		=> '[removed]',
+									'window.location'	=> '[removed]',
+									'-moz-binding'		=> '[removed]',
+									'<!--'				=> '&lt;!--',
+									'-->'				=> '--&gt;',
+									'<![CDATA['			=> '&lt;![CDATA['
+									);
+	/* never allowed, regex replacement */
+	var $never_allowed_regex = array(
+										"javascript\s*:"			=> '[removed]',
+										"expression\s*(\(|&\#40;)"	=> '[removed]', // CSS and IE
+										"vbscript\s*:"				=> '[removed]', // IE, surprise!
+										"Redirect\s+302"			=> '[removed]'
+									);
+
+	/**
+	* Constructor
+	*
+	* Sets whether to globally enable the XSS processing
+	* and whether to allow the $_GET array
+	*
+	* @access	public
+	*/
+	function CI_Input()
+	{
+		log_message('debug', "Input Class Initialized");
+
+		$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;
+		$this->_sanitize_globals();
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* Sanitize Globals
+	*
+	* This function does the following:
+	*
+	* Unsets $_GET data (if query strings are not enabled)
+	*
+	* Unsets all globals if register_globals is enabled
+	*
+	* Standardizes newline characters to \n
+	*
+	* @access	private
+	* @return	void
+	*/
+	function _sanitize_globals()
+	{
+		// Would kind of be "wrong" to unset any of these GLOBALS
+		$protected = array('_SERVER', '_GET', '_POST', '_FILES', '_REQUEST', '_SESSION', '_ENV', 'GLOBALS', 'HTTP_RAW_POST_DATA',
+							'system_folder', 'application_folder', 'BM', 'EXT', 'CFG', 'URI', 'RTR', 'OUT', 'IN');
+
+		// Unset globals for security. 
+		// This is effectively the same as register_globals = off
+		foreach (array($_GET, $_POST, $_COOKIE, $_SERVER, $_FILES, $_ENV, (isset($_SESSION) && is_array($_SESSION)) ? $_SESSION : array()) as $global)
+		{
+			if ( ! is_array($global))
+			{
+				if ( ! in_array($global, $protected))
+				{
+					unset($GLOBALS[$global]);
+				}
+			}
+			else
+			{
+				foreach ($global as $key => $val)
+				{
+					if ( ! in_array($key, $protected))
+					{
+						unset($GLOBALS[$key]);
+					}
+
+					if (is_array($val))
+					{
+						foreach($val as $k => $v)
+						{
+							if ( ! in_array($k, $protected))
+							{
+								unset($GLOBALS[$k]);
+							}
+						}
+					}
+				}
+			}
+		}
+
+		// Is $_GET data allowed? If not we'll set the $_GET to an empty array
+		if ($this->allow_get_array == FALSE)
+		{
+			$_GET = array();
+		}
+		else
+		{
+			$_GET = $this->_clean_input_data($_GET);
+		}
+
+		// Clean $_POST Data
+		$_POST = $this->_clean_input_data($_POST);
+
+		// Clean $_COOKIE Data
+		// Also get rid of specially treated cookies that might be set by a server
+		// or silly application, that are of no use to a CI application anyway
+		// but that when present will trip our 'Disallowed Key Characters' alarm
+		// http://www.ietf.org/rfc/rfc2109.txt
+		// note that the key names below are single quoted strings, and are not PHP variables
+		unset($_COOKIE['$Version']);
+		unset($_COOKIE['$Path']);
+		unset($_COOKIE['$Domain']);
+		$_COOKIE = $this->_clean_input_data($_COOKIE);
+
+		log_message('debug', "Global POST and COOKIE data sanitized");
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* Clean Input Data
+	*
+	* This is a helper function. It escapes data and
+	* standardizes newline characters to \n
+	*
+	* @access	private
+	* @param	string
+	* @return	string
+	*/
+	function _clean_input_data($str)
+	{
+		if (is_array($str))
+		{
+			$new_array = array();
+			foreach ($str as $key => $val)
+			{
+				$new_array[$this->_clean_input_keys($key)] = $this->_clean_input_data($val);
+			}
+			return $new_array;
+		}
+
+		// We strip slashes if magic quotes is on to keep things consistent
+		if (get_magic_quotes_gpc())
+		{
+			$str = stripslashes($str);
+		}
+
+		// Should we filter the input data?
+		if ($this->use_xss_clean === TRUE)
+		{
+			$str = $this->xss_clean($str);
+		}
+
+		// Standardize newlines
+		if (strpos($str, "\r") !== FALSE)
+		{
+			$str = str_replace(array("\r\n", "\r"), "\n", $str);
+		}
+
+		return $str;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* Clean Keys
+	*
+	* This is a helper function. To prevent malicious users
+	* from trying to exploit keys we make sure that keys are
+	* only named with alpha-numeric text and a few other items.
+	*
+	* @access	private
+	* @param	string
+	* @return	string
+	*/
+	function _clean_input_keys($str)
+	{
+		if ( ! preg_match("/^[a-z0-9:_\/-]+$/i", $str))
+		{
+			exit('Disallowed Key Characters.');
+		}
+
+		return $str;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* Fetch from array
+	*
+	* This is a helper function to retrieve values from global arrays
+	*
+	* @access	private
+	* @param	array
+	* @param	string
+	* @param	bool
+	* @return	string
+	*/
+	function _fetch_from_array(&$array, $index = '', $xss_clean = FALSE)
+	{
+		if ( ! isset($array[$index]))
+		{
+			return FALSE;
+		}
+
+		if ($xss_clean === TRUE)
+		{
+			return $this->xss_clean($array[$index]);
+		}
+
+		return $array[$index];
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* Fetch an item from the GET array
+	*
+	* @access	public
+	* @param	string
+	* @param	bool
+	* @return	string
+	*/
+	function get($index = '', $xss_clean = FALSE)
+	{
+		return $this->_fetch_from_array($_GET, $index, $xss_clean);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* Fetch an item from the POST array
+	*
+	* @access	public
+	* @param	string
+	* @param	bool
+	* @return	string
+	*/
+	function post($index = '', $xss_clean = FALSE)
+	{
+		return $this->_fetch_from_array($_POST, $index, $xss_clean);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* Fetch an item from either the GET array or the POST
+	*
+	* @access	public
+	* @param	string	The index key
+	* @param	bool	XSS cleaning
+	* @return	string
+	*/
+	function get_post($index = '', $xss_clean = FALSE)
+	{
+		if ( ! isset($_POST[$index]) )
+		{
+			return $this->get($index, $xss_clean);
+		}
+		else
+		{
+			return $this->post($index, $xss_clean);
+		}
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* Fetch an item from the COOKIE array
+	*
+	* @access	public
+	* @param	string
+	* @param	bool
+	* @return	string
+	*/
+	function cookie($index = '', $xss_clean = FALSE)
+	{
+		return $this->_fetch_from_array($_COOKIE, $index, $xss_clean);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* Fetch an item from the SERVER array
+	*
+	* @access	public
+	* @param	string
+	* @param	bool
+	* @return	string
+	*/
+	function server($index = '', $xss_clean = FALSE)
+	{
+		return $this->_fetch_from_array($_SERVER, $index, $xss_clean);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* Fetch the IP Address
+	*
+	* @access	public
+	* @return	string
+	*/
+	function ip_address()
+	{
+		if ($this->ip_address !== FALSE)
+		{
+			return $this->ip_address;
+		}
+		
+		if (config_item('proxy_ips') != '' && $this->server('HTTP_X_FORWARDED_FOR') && $this->server('REMOTE_ADDR'))
+		{
+			$proxies = preg_split('/[\s,]/', config_item('proxy_ips'), -1, PREG_SPLIT_NO_EMPTY);
+			$proxies = is_array($proxies) ? $proxies : array($proxies);
+
+			$this->ip_address = in_array($_SERVER['REMOTE_ADDR'], $proxies) ? $_SERVER['HTTP_X_FORWARDED_FOR'] : $_SERVER['REMOTE_ADDR'];
+		}
+		elseif ($this->server('REMOTE_ADDR') AND $this->server('HTTP_CLIENT_IP'))
+		{
+			$this->ip_address = $_SERVER['HTTP_CLIENT_IP'];
+		}
+		elseif ($this->server('REMOTE_ADDR'))
+		{
+			$this->ip_address = $_SERVER['REMOTE_ADDR'];
+		}
+		elseif ($this->server('HTTP_CLIENT_IP'))
+		{
+			$this->ip_address = $_SERVER['HTTP_CLIENT_IP'];
+		}
+		elseif ($this->server('HTTP_X_FORWARDED_FOR'))
+		{
+			$this->ip_address = $_SERVER['HTTP_X_FORWARDED_FOR'];
+		}
+
+		if ($this->ip_address === FALSE)
+		{
+			$this->ip_address = '0.0.0.0';
+			return $this->ip_address;
+		}
+
+		if (strstr($this->ip_address, ','))
+		{
+			$x = explode(',', $this->ip_address);
+			$this->ip_address = trim(end($x));
+		}
+
+		if ( ! $this->valid_ip($this->ip_address))
+		{
+			$this->ip_address = '0.0.0.0';
+		}
+
+		return $this->ip_address;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* Validate IP Address
+	*
+	* Updated version suggested by Geert De Deckere
+	* 
+	* @access	public
+	* @param	string
+	* @return	string
+	*/
+	function valid_ip($ip)
+	{
+		$ip_segments = explode('.', $ip);
+
+		// Always 4 segments needed
+		if (count($ip_segments) != 4)
+		{
+			return FALSE;
+		}
+		// IP can not start with 0
+		if ($ip_segments[0][0] == '0')
+		{
+			return FALSE;
+		}
+		// Check each segment
+		foreach ($ip_segments as $segment)
+		{
+			// IP segments must be digits and can not be 
+			// longer than 3 digits or greater then 255
+			if ($segment == '' OR preg_match("/[^0-9]/", $segment) OR $segment > 255 OR strlen($segment) > 3)
+			{
+				return FALSE;
+			}
+		}
+
+		return TRUE;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* User Agent
+	*
+	* @access	public
+	* @return	string
+	*/
+	function user_agent()
+	{
+		if ($this->user_agent !== FALSE)
+		{
+			return $this->user_agent;
+		}
+
+		$this->user_agent = ( ! isset($_SERVER['HTTP_USER_AGENT'])) ? FALSE : $_SERVER['HTTP_USER_AGENT'];
+
+		return $this->user_agent;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* Filename Security
+	*
+	* @access	public
+	* @param	string
+	* @return	string
+	*/
+	function filename_security($str)
+	{
+		$bad = array(
+						"../",
+						"./",
+						"<!--",
+						"-->",
+						"<",
+						">",
+						"'",
+						'"',
+						'&',
+						'$',
+						'#',
+						'{',
+						'}',
+						'[',
+						']',
+						'=',
+						';',
+						'?',
+						"%20",
+						"%22",
+						"%3c",		// <
+						"%253c", 	// <
+						"%3e", 		// >
+						"%0e", 		// >
+						"%28", 		// (  
+						"%29", 		// ) 
+						"%2528", 	// (
+						"%26", 		// &
+						"%24", 		// $
+						"%3f", 		// ?
+						"%3b", 		// ;
+						"%3d"		// =
+					);
+
+		return stripslashes(str_replace($bad, '', $str));
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* XSS Clean
+	*
+	* Sanitizes data so that Cross Site Scripting Hacks can be
+	* prevented.  This function does a fair amount of work but
+	* it is extremely thorough, designed to prevent even the
+	* most obscure XSS attempts.  Nothing is ever 100% foolproof,
+	* of course, but I haven't been able to get anything passed
+	* the filter.
+	*
+	* Note: This function should only be used to deal with data
+	* upon submission.  It's not something that should
+	* be used for general runtime processing.
+	*
+	* This function was based in part on some code and ideas I
+	* got from Bitflux: http://blog.bitflux.ch/wiki/XSS_Prevention
+	*
+	* To help develop this script I used this great list of
+	* vulnerabilities along with a few other hacks I've
+	* harvested from examining vulnerabilities in other programs:
+	* http://ha.ckers.org/xss.html
+	*
+	* @access	public
+	* @param	string
+	* @return	string
+	*/
+	function xss_clean($str, $is_image = FALSE)
+	{
+		/*
+		* Is the string an array?
+		*
+		*/
+		if (is_array($str))
+		{
+			while (list($key) = each($str))
+			{
+				$str[$key] = $this->xss_clean($str[$key]);
+			}
+
+			return $str;
+		}
+
+		/*
+		* Remove Invisible Characters
+		*/
+		$str = $this->_remove_invisible_characters($str);
+
+		/*
+		* Protect GET variables in URLs
+		*/
+
+		// 901119URL5918AMP18930PROTECT8198
+
+		$str = preg_replace('|\&([a-z\_0-9\-]+)\=([a-z\_0-9\-]+)|i', $this->xss_hash()."\\1=\\2", $str);
+
+		/*
+		* Validate standard character entities
+		*
+		* Add a semicolon if missing.  We do this to enable
+		* the conversion of entities to ASCII later.
+		*
+		*/
+		$str = preg_replace('#(&\#?[0-9a-z]{2,})([\x00-\x20])*;?#i', "\\1;\\2", $str);
+
+		/*
+		* Validate UTF16 two byte encoding (x00) 
+		*
+		* Just as above, adds a semicolon if missing.
+		*
+		*/
+		$str = preg_replace('#(&\#x?)([0-9A-F]+);?#i',"\\1\\2;",$str);
+
+		/*
+		* Un-Protect GET variables in URLs
+		*/
+		$str = str_replace($this->xss_hash(), '&', $str);
+
+		/*
+		* URL Decode
+		*
+		* Just in case stuff like this is submitted:
+		*
+		* <a href="http://%77%77%77%2E%67%6F%6F%67%6C%65%2E%63%6F%6D">Google</a>
+		*
+		* Note: Use rawurldecode() so it does not remove plus signs
+		*
+		*/
+		$str = rawurldecode($str);
+
+		/*
+		* Convert character entities to ASCII 
+		*
+		* This permits our tests below to work reliably.
+		* We only convert entities that are within tags since
+		* these are the ones that will pose security problems.
+		*
+		*/
+
+		$str = preg_replace_callback("/[a-z]+=([\'\"]).*?\\1/si", array($this, '_convert_attribute'), $str);
+
+		$str = preg_replace_callback("/<\w+.*?(?=>|<|$)/si", array($this, '_html_entity_decode_callback'), $str);
+
+		/*
+		* Remove Invisible Characters Again!
+		*/
+		$str = $this->_remove_invisible_characters($str);
+
+		/*
+		* Convert all tabs to spaces
+		*
+		* 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 large blocks of data,
+		* so we use str_replace.
+		*
+		*/
+
+ 		if (strpos($str, "\t") !== FALSE)
+		{
+			$str = str_replace("\t", ' ', $str);
+		}
+
+		/*
+		* Capture converted string for later comparison
+		*/
+		$converted_string = $str;
+
+		/*
+		* Not Allowed Under Any Conditions
+		*/
+
+		foreach ($this->never_allowed_str as $key => $val)
+		{
+			$str = str_replace($key, $val, $str);   
+		}
+
+		foreach ($this->never_allowed_regex as $key => $val)
+		{
+			$str = preg_replace("#".$key."#i", $val, $str);   
+		}
+
+		/*
+		* Makes PHP tags safe
+		*
+		*  Note: XML tags are inadvertently replaced too:
+		*
+		*	<?xml
+		*
+		* But it doesn't seem to pose a problem.
+		*
+		*/
+		if ($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 do the long opening tags.
+			$str = preg_replace('/<\?(php)/i', "&lt;?\\1", $str);
+		}
+		else
+		{
+			$str = str_replace(array('<?', '?'.'>'),  array('&lt;?', '?&gt;'), $str);
+		}
+
+		/*
+		* Compact any exploded words
+		*
+		* This corrects words like:  j a v a s c r i p t
+		* These words are compacted back to their correct state.
+		*
+		*/
+		$words = array('javascript', 'expression', 'vbscript', 'script', 'applet', 'alert', 'document', 'write', 'cookie', 'window');
+		foreach ($words as $word)
+		{
+			$temp = '';
+
+			for ($i = 0, $wordlen = strlen($word); $i < $wordlen; $i++)
+			{
+				$temp .= substr($word, $i, 1)."\s*";
+			}
+
+			// We only want to do this when it is followed by a non-word character
+			// That way valid stuff like "dealer to" does not become "dealerto"
+			$str = preg_replace_callback('#('.substr($temp, 0, -3).')(\W)#is', array($this, '_compact_exploded_words'), $str);
+		}
+
+		/*
+		* 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 preg_match(), especially if the pattern exists in the string
+		*/
+		do
+		{
+			$original = $str;
+
+			if (preg_match("/<a/i", $str))
+			{
+				$str = preg_replace_callback("#<a\s+([^>]*?)(>|$)#si", array($this, '_js_link_removal'), $str);
+			}
+
+			if (preg_match("/<img/i", $str))
+			{
+				$str = preg_replace_callback("#<img\s+([^>]*?)(\s?/?>|$)#si", array($this, '_js_img_removal'), $str);
+			}
+
+			if (preg_match("/script/i", $str) OR preg_match("/xss/i", $str))
+			{
+				$str = preg_replace("#<(/*)(script|xss)(.*?)\>#si", '[removed]', $str);
+			}
+		}
+		while($original != $str);
+
+		unset($original);
+
+		/*
+		* Remove JavaScript Event Handlers
+		*
+		* Note: This code is a little blunt.  It removes
+		* the event handler and anything up to the closing >,
+		* but it's unlikely to be a problem.
+		*
+		*/
+		$event_handlers = array('[^a-z_\-]on\w*','xmlns');
+
+		if ($is_image === TRUE)
+		{
+			/*
+			* Adobe Photoshop puts XML metadata into JFIF images, including namespacing, 
+			* so we have to allow this for images. -Paul
+			*/
+			unset($event_handlers[array_search('xmlns', $event_handlers)]);
+		}
+
+		$str = preg_replace("#<([^><]+?)(".implode('|', $event_handlers).")(\s*=\s*[^><]*)([><]*)#i", "<\\1\\4", $str);
+
+		/*
+		* Sanitize naughty HTML elements
+		*
+		* If a tag containing any of the words in the list
+		* below is found, the tag gets converted to entities.
+		*
+		* So this: <blink>
+		* Becomes: &lt;blink&gt;
+		*
+		*/
+		$naughty = 'alert|applet|audio|basefont|base|behavior|bgsound|blink|body|embed|expression|form|frameset|frame|head|html|ilayer|iframe|input|isindex|layer|link|meta|object|plaintext|style|script|textarea|title|video|xml|xss';
+		$str = preg_replace_callback('#<(/*\s*)('.$naughty.')([^><]*)([><]*)#is', array($this, '_sanitize_naughty_html'), $str);
+
+		/*
+		* Sanitize naughty scripting elements
+		*
+		* Similar to above, only instead of looking for
+		* tags it looks for PHP and JavaScript commands
+		* that are disallowed.  Rather than removing the
+		* code, it simply converts the parenthesis to entities
+		* rendering the code un-executable.
+		*
+		* For example:	eval('some code')
+		* Becomes:		eval&#40;'some code'&#41;
+		*
+		*/
+		$str = preg_replace('#(alert|cmd|passthru|eval|exec|expression|system|fopen|fsockopen|file|file_get_contents|readfile|unlink)(\s*)\((.*?)\)#si', "\\1\\2&#40;\\3&#41;", $str);
+
+		/*
+		* Final clean up
+		*
+		* This adds a bit of extra precaution in case
+		* something got through the above filters
+		*
+		*/
+		foreach ($this->never_allowed_str as $key => $val)
+		{
+			$str = str_replace($key, $val, $str);   
+		}
+
+		foreach ($this->never_allowed_regex as $key => $val)
+		{
+			$str = preg_replace("#".$key."#i", $val, $str);
+		}
+
+		/*
+		*  Images are Handled in a Special Way
+		*  - Essentially, we want to know that after all of the character conversion is done whether
+		*  any unwanted, likely XSS, code was found.  If not, we return TRUE, as the image is clean.
+		*  However, if the string post-conversion does not matched the string post-removal of XSS,
+		*  then it fails, as there was unwanted XSS code found and removed/changed during processing.
+		*/
+
+		if ($is_image === TRUE)
+		{
+			if ($str == $converted_string)
+			{
+				return TRUE;
+			}
+			else
+			{
+				return FALSE;
+			}
+		}
+
+		log_message('debug', "XSS Filtering completed");
+		return $str;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* Random Hash for protecting URLs
+	*
+	* @access	public
+	* @return	string
+	*/
+	function xss_hash()
+	{
+		if ($this->xss_hash == '')
+		{
+			if (phpversion() >= 4.2)
+				mt_srand();
+			else
+				mt_srand(hexdec(substr(md5(microtime()), -8)) & 0x7fffffff);
+
+			$this->xss_hash = md5(time() + mt_rand(0, 1999999999));
+		}
+
+		return $this->xss_hash;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* Remove Invisible Characters
+	*
+	* This prevents sandwiching null characters
+	* between ascii characters, like Java\0script.
+	*
+	* @access	public
+	* @param	string
+	* @return	string
+	*/
+	function _remove_invisible_characters($str)
+	{
+		static $non_displayables;
+
+		if ( ! isset($non_displayables))
+		{
+			// every control character except newline (dec 10), carriage return (dec 13), and horizontal tab (dec 09),
+			$non_displayables = array(
+										'/%0[0-8bcef]/',			// url encoded 00-08, 11, 12, 14, 15
+										'/%1[0-9a-f]/',				// url encoded 16-31
+										'/[\x00-\x08]/',			// 00-08
+										'/\x0b/', '/\x0c/',			// 11, 12
+										'/[\x0e-\x1f]/'				// 14-31
+									);
+		}
+
+		do
+		{
+			$cleaned = $str;
+			$str = preg_replace($non_displayables, '', $str);
+		}
+		while ($cleaned != $str);
+
+		return $str;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* Compact Exploded Words
+	*
+	* Callback function for xss_clean() to remove whitespace from
+	* things like j a v a s c r i p t
+	*
+	* @access	public
+	* @param	type
+	* @return	type
+	*/
+	function _compact_exploded_words($matches)
+	{
+		return preg_replace('/\s+/s', '', $matches[1]).$matches[2];
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* Sanitize Naughty HTML
+	*
+	* Callback function for xss_clean() to remove naughty HTML elements
+	*
+	* @access	private
+	* @param	array
+	* @return	string
+	*/
+	function _sanitize_naughty_html($matches)
+	{
+		// encode opening brace
+		$str = '&lt;'.$matches[1].$matches[2].$matches[3];
+
+		// encode captured opening or closing brace to prevent recursive vectors
+		$str .= str_replace(array('>', '<'), array('&gt;', '&lt;'), $matches[4]);
+
+		return $str;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* JS Link Removal
+	*
+	* Callback function for xss_clean() to sanitize links
+	* This limits the PCRE backtracks, making it more performance friendly
+	* and prevents PREG_BACKTRACK_LIMIT_ERROR from being triggered in
+	* PHP 5.2+ on link-heavy strings
+	*
+	* @access	private
+	* @param	array
+	* @return	string
+	*/
+	function _js_link_removal($match)
+	{
+		$attributes = $this->_filter_attributes(str_replace(array('<', '>'), '', $match[1]));
+		return str_replace($match[1], preg_replace("#href=.*?(alert\(|alert&\#40;|javascript\:|charset\=|window\.|document\.|\.cookie|<script|<xss|base64\s*,)#si", "", $attributes), $match[0]);
+	}
+
+	/**
+	* JS Image Removal
+	*
+	* Callback function for xss_clean() to sanitize image tags
+	* This limits the PCRE backtracks, making it more performance friendly
+	* and prevents PREG_BACKTRACK_LIMIT_ERROR from being triggered in
+	* PHP 5.2+ on image tag heavy strings
+	*
+	* @access	private
+	* @param	array
+	* @return	string
+	*/
+	function _js_img_removal($match)
+	{
+		$attributes = $this->_filter_attributes(str_replace(array('<', '>'), '', $match[1]));
+		return str_replace($match[1], preg_replace("#src=.*?(alert\(|alert&\#40;|javascript\:|charset\=|window\.|document\.|\.cookie|<script|<xss|base64\s*,)#si", "", $attributes), $match[0]);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* Attribute Conversion
+	*
+	* Used as a callback for XSS Clean
+	*
+	* @access	public
+	* @param	array
+	* @return	string
+	*/
+	function _convert_attribute($match)
+	{
+		return str_replace(array('>', '<', '\\'), array('&gt;', '&lt;', '\\\\'), $match[0]);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* HTML Entity Decode Callback
+	*
+	* Used as a callback for XSS Clean
+	*
+	* @access	public
+	* @param	array
+	* @return	string
+	*/
+	function _html_entity_decode_callback($match)
+	{
+		$CFG =& load_class('Config');
+		$charset = $CFG->item('charset');
+
+		return $this->_html_entity_decode($match[0], strtoupper($charset));
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* HTML Entities Decode
+	*
+	* This function is a replacement for html_entity_decode()
+	*
+	* In some versions of PHP the native function does not work
+	* when UTF-8 is the specified character set, so this gives us
+	* a work-around.  More info here:
+	* http://bugs.php.net/bug.php?id=25670
+	*
+	* @access	private
+	* @param	string
+	* @param	string
+	* @return	string
+	*/
+	/* -------------------------------------------------
+	/*  Replacement for html_entity_decode()
+	/* -------------------------------------------------*/
+
+	/*
+	NOTE: html_entity_decode() has a bug in some PHP versions when UTF-8 is the
+	character set, and the PHP developers said they were not back porting the
+	fix to versions other than PHP 5.x.
+	*/
+	function _html_entity_decode($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' OR version_compare(phpversion(), '5.0.0', '>=')))
+		{
+			$str = html_entity_decode($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 $str;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	* Filter Attributes
+	*
+	* Filters tag attributes for consistency and safety
+	*
+	* @access	public
+	* @param	string
+	* @return	string
+	*/
+	function _filter_attributes($str)
+	{
+		$out = '';
+
+		if (preg_match_all('#\s*[a-z\-]+\s*=\s*(\042|\047)([^\\1]*?)\\1#is', $str, $matches))
+		{
+			foreach ($matches[0] as $match)
+			{
+				$out .= preg_replace("#/\*.*?\*/#s", '', $match);
+			}
+		}
+
+		return $out;
+	}
+
+	// --------------------------------------------------------------------
+
+}
+// END Input class
+
+/* End of file Input.php */
+/* Location: ./system/libraries/Input.php */
\ No newline at end of file
diff --git a/system/core/Lang.php b/system/core/Lang.php
new file mode 100644
index 000000000..515d04a40
--- /dev/null
+++ b/system/core/Lang.php
@@ -0,0 +1,123 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		ExpressionEngine Dev Team
+ * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * Language Class
+ *
+ * @package		CodeIgniter
+ * @subpackage	Libraries
+ * @category	Language
+ * @author		ExpressionEngine Dev Team
+ * @link		http://codeigniter.com/user_guide/libraries/language.html
+ */
+class CI_Language {
+
+	var $language	= array();
+	var $is_loaded	= array();
+
+	/**
+	 * Constructor
+	 *
+	 * @access	public
+	 */
+	function CI_Language()
+	{
+		log_message('debug', "Language Class Initialized");
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Load a language file
+	 *
+	 * @access	public
+	 * @param	mixed	the name of the language file to be loaded. Can be an array
+	 * @param	string	the language (english, etc.)
+	 * @return	mixed
+	 */
+	function load($langfile = '', $idiom = '', $return = FALSE)
+	{
+		$langfile = str_replace(EXT, '', str_replace('_lang.', '', $langfile)).'_lang'.EXT;
+
+		if (in_array($langfile, $this->is_loaded, TRUE))
+		{
+			return;
+		}
+
+		if ($idiom == '')
+		{
+			$CI =& get_instance();
+			$deft_lang = $CI->config->item('language');
+			$idiom = ($deft_lang == '') ? 'english' : $deft_lang;
+		}
+
+		// Determine where the language file is and load it
+		if (file_exists(APPPATH.'language/'.$idiom.'/'.$langfile))
+		{
+			include(APPPATH.'language/'.$idiom.'/'.$langfile);
+		}
+		else
+		{
+			if (file_exists(BASEPATH.'language/'.$idiom.'/'.$langfile))
+			{
+				include(BASEPATH.'language/'.$idiom.'/'.$langfile);
+			}
+			else
+			{
+				show_error('Unable to load the requested language file: language/'.$idiom.'/'.$langfile);
+			}
+		}
+
+		if ( ! isset($lang))
+		{
+			log_message('error', 'Language file contains no data: language/'.$idiom.'/'.$langfile);
+			return;
+		}
+
+		if ($return == TRUE)
+		{
+			return $lang;
+		}
+
+		$this->is_loaded[] = $langfile;
+		$this->language = array_merge($this->language, $lang);
+		unset($lang);
+
+		log_message('debug', 'Language file loaded: language/'.$idiom.'/'.$langfile);
+		return TRUE;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Fetch a single line of text from the language array
+	 *
+	 * @access	public
+	 * @param	string	$line 	the language line
+	 * @return	string
+	 */
+	function line($line = '')
+	{
+		$line = ($line == '' OR ! isset($this->language[$line])) ? FALSE : $this->language[$line];
+		return $line;
+	}
+
+}
+// END Language Class
+
+/* End of file Language.php */
+/* Location: ./system/libraries/Language.php */
\ No newline at end of file
diff --git a/system/core/Loader.php b/system/core/Loader.php
new file mode 100644
index 000000000..2cd2e93b9
--- /dev/null
+++ b/system/core/Loader.php
@@ -0,0 +1,1085 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		ExpressionEngine Dev Team
+ * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * Loader Class
+ *
+ * Loads views and files
+ *
+ * @package		CodeIgniter
+ * @subpackage	Libraries
+ * @author		ExpressionEngine Dev Team
+ * @category	Loader
+ * @link		http://codeigniter.com/user_guide/libraries/loader.html
+ */
+class CI_Loader {
+
+	// All these are set automatically. Don't mess with them.
+	var $_ci_ob_level;
+	var $_ci_view_path		= '';
+	var $_ci_is_php5		= FALSE;
+	var $_ci_is_instance 	= FALSE; // Whether we should use $this or $CI =& get_instance()
+	var $_ci_cached_vars	= array();
+	var $_ci_classes		= array();
+	var $_ci_loaded_files	= array();
+	var $_ci_models			= array();
+	var $_ci_helpers		= array();
+	var $_ci_plugins		= array();
+	var $_ci_varmap			= array('unit_test' => 'unit', 'user_agent' => 'agent');
+	
+
+	/**
+	 * Constructor
+	 *
+	 * Sets the path to the view files and gets the initial output buffering level
+	 *
+	 * @access	public
+	 */
+	function CI_Loader()
+	{	
+		$this->_ci_is_php5 = (floor(phpversion()) >= 5) ? TRUE : FALSE;
+		$this->_ci_view_path = APPPATH.'views/';
+		$this->_ci_ob_level  = ob_get_level();
+				
+		log_message('debug', "Loader Class Initialized");
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Class Loader
+	 *
+	 * This function lets users load and instantiate classes.
+	 * It is designed to be called from a user's app controllers.
+	 *
+	 * @access	public
+	 * @param	string	the name of the class
+	 * @param	mixed	the optional parameters
+	 * @param	string	an optional object name
+	 * @return	void
+	 */	
+	function library($library = '', $params = NULL, $object_name = NULL)
+	{
+		if ($library == '')
+		{
+			return FALSE;
+		}
+
+		if ( ! is_null($params) AND ! is_array($params))
+		{
+			$params = NULL;
+		}
+
+		if (is_array($library))
+		{
+			foreach ($library as $class)
+			{
+				$this->_ci_load_class($class, $params, $object_name);
+			}
+		}
+		else
+		{
+			$this->_ci_load_class($library, $params, $object_name);
+		}
+		
+		$this->_ci_assign_to_models();
+	}
+
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Model Loader
+	 *
+	 * This function lets users load and instantiate models.
+	 *
+	 * @access	public
+	 * @param	string	the name of the class
+	 * @param	string	name for the model
+	 * @param	bool	database connection
+	 * @return	void
+	 */	
+	function model($model, $name = '', $db_conn = FALSE)
+	{		
+		if (is_array($model))
+		{
+			foreach($model as $babe)
+			{
+				$this->model($babe);	
+			}
+			return;
+		}
+
+		if ($model == '')
+		{
+			return;
+		}
+	
+		// Is the model in a sub-folder? If so, parse out the filename and path.
+		if (strpos($model, '/') === FALSE)
+		{
+			$path = '';
+		}
+		else
+		{
+			$x = explode('/', $model);
+			$model = end($x);			
+			unset($x[count($x)-1]);
+			$path = implode('/', $x).'/';
+		}
+	
+		if ($name == '')
+		{
+			$name = $model;
+		}
+		
+		if (in_array($name, $this->_ci_models, TRUE))
+		{
+			return;
+		}
+		
+		$CI =& get_instance();
+		if (isset($CI->$name))
+		{
+			show_error('The model name you are loading is the name of a resource that is already being used: '.$name);
+		}
+	
+		$model = strtolower($model);
+		
+		if ( ! file_exists(APPPATH.'models/'.$path.$model.EXT))
+		{
+			show_error('Unable to locate the model you have specified: '.$model);
+		}
+				
+		if ($db_conn !== FALSE AND ! class_exists('CI_DB'))
+		{
+			if ($db_conn === TRUE)
+				$db_conn = '';
+		
+			$CI->load->database($db_conn, FALSE, TRUE);
+		}
+	
+		if ( ! class_exists('Model'))
+		{
+			load_class('Model', FALSE);
+		}
+
+		require_once(APPPATH.'models/'.$path.$model.EXT);
+
+		$model = ucfirst($model);
+				
+		$CI->$name = new $model();
+		$CI->$name->_assign_libraries();
+		
+		$this->_ci_models[] = $name;	
+	}
+		
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Database Loader
+	 *
+	 * @access	public
+	 * @param	string	the DB credentials
+	 * @param	bool	whether to return the DB object
+	 * @param	bool	whether to enable active record (this allows us to override the config setting)
+	 * @return	object
+	 */	
+	function database($params = '', $return = FALSE, $active_record = NULL)
+	{
+		// Grab the super object
+		$CI =& get_instance();
+		
+		// Do we even need to load the database class?
+		if (class_exists('CI_DB') AND $return == FALSE AND $active_record == NULL AND isset($CI->db) AND is_object($CI->db))
+		{
+			return FALSE;
+		}	
+	
+		require_once(BASEPATH.'database/DB'.EXT);
+
+		if ($return === TRUE)
+		{
+			return DB($params, $active_record);
+		}
+		
+		// Initialize the db variable.  Needed to prevent   
+		// reference errors with some configurations
+		$CI->db = '';
+		
+		// Load the DB class
+		$CI->db =& DB($params, $active_record);	
+		
+		// Assign the DB object to any existing models
+		$this->_ci_assign_to_models();
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Load the Utilities Class
+	 *
+	 * @access	public
+	 * @return	string		
+	 */		
+	function dbutil()
+	{
+		if ( ! class_exists('CI_DB'))
+		{
+			$this->database();
+		}
+		
+		$CI =& get_instance();
+
+		// for backwards compatibility, load dbforge so we can extend dbutils off it
+		// this use is deprecated and strongly discouraged
+		$CI->load->dbforge();
+	
+		require_once(BASEPATH.'database/DB_utility'.EXT);
+		require_once(BASEPATH.'database/drivers/'.$CI->db->dbdriver.'/'.$CI->db->dbdriver.'_utility'.EXT);
+		$class = 'CI_DB_'.$CI->db->dbdriver.'_utility';
+
+		$CI->dbutil =& instantiate_class(new $class());
+
+		$CI->load->_ci_assign_to_models();
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Load the Database Forge Class
+	 *
+	 * @access	public
+	 * @return	string		
+	 */		
+	function dbforge()
+	{
+		if ( ! class_exists('CI_DB'))
+		{
+			$this->database();
+		}
+		
+		$CI =& get_instance();
+	
+		require_once(BASEPATH.'database/DB_forge'.EXT);
+		require_once(BASEPATH.'database/drivers/'.$CI->db->dbdriver.'/'.$CI->db->dbdriver.'_forge'.EXT);
+		$class = 'CI_DB_'.$CI->db->dbdriver.'_forge';
+
+		$CI->dbforge = new $class();
+		
+		$CI->load->_ci_assign_to_models();
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Load View
+	 *
+	 * This function is used to load a "view" file.  It has three parameters:
+	 *
+	 * 1. The name of the "view" file to be included.
+	 * 2. An associative array of data to be extracted for use in the view.
+	 * 3. TRUE/FALSE - whether to return the data or load it.  In
+	 * some cases it's advantageous to be able to return data so that
+	 * a developer can process it in some way.
+	 *
+	 * @access	public
+	 * @param	string
+	 * @param	array
+	 * @param	bool
+	 * @return	void
+	 */
+	function view($view, $vars = array(), $return = FALSE)
+	{
+		return $this->_ci_load(array('_ci_view' => $view, '_ci_vars' => $this->_ci_object_to_array($vars), '_ci_return' => $return));
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Load File
+	 *
+	 * This is a generic file loader
+	 *
+	 * @access	public
+	 * @param	string
+	 * @param	bool
+	 * @return	string
+	 */
+	function file($path, $return = FALSE)
+	{
+		return $this->_ci_load(array('_ci_path' => $path, '_ci_return' => $return));
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Set Variables
+	 *
+	 * Once variables are set they become available within
+	 * the controller class and its "view" files.
+	 *
+	 * @access	public
+	 * @param	array
+	 * @return	void
+	 */
+	function vars($vars = array(), $val = '')
+	{
+		if ($val != '' AND is_string($vars))
+		{
+			$vars = array($vars => $val);
+		}
+	
+		$vars = $this->_ci_object_to_array($vars);
+	
+		if (is_array($vars) AND count($vars) > 0)
+		{
+			foreach ($vars as $key => $val)
+			{
+				$this->_ci_cached_vars[$key] = $val;
+			}
+		}
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Load Helper
+	 *
+	 * This function loads the specified helper file.
+	 *
+	 * @access	public
+	 * @param	mixed
+	 * @return	void
+	 */
+	function helper($helpers = array())
+	{
+		if ( ! is_array($helpers))
+		{
+			$helpers = array($helpers);
+		}
+	
+		foreach ($helpers as $helper)
+		{		
+			$helper = strtolower(str_replace(EXT, '', str_replace('_helper', '', $helper)).'_helper');
+
+			if (isset($this->_ci_helpers[$helper]))
+			{
+				continue;
+			}
+			
+			$ext_helper = APPPATH.'helpers/'.config_item('subclass_prefix').$helper.EXT;
+
+			// Is this a helper extension request?			
+			if (file_exists($ext_helper))
+			{
+				$base_helper = BASEPATH.'helpers/'.$helper.EXT;
+				
+				if ( ! file_exists($base_helper))
+				{
+					show_error('Unable to load the requested file: helpers/'.$helper.EXT);
+				}
+				
+				include_once($ext_helper);
+				include_once($base_helper);
+			}
+			elseif (file_exists(APPPATH.'helpers/'.$helper.EXT))
+			{ 
+				include_once(APPPATH.'helpers/'.$helper.EXT);
+			}
+			else
+			{		
+				if (file_exists(BASEPATH.'helpers/'.$helper.EXT))
+				{
+					include_once(BASEPATH.'helpers/'.$helper.EXT);
+				}
+				else
+				{
+					show_error('Unable to load the requested file: helpers/'.$helper.EXT);
+				}
+			}
+
+			$this->_ci_helpers[$helper] = TRUE;
+			log_message('debug', 'Helper loaded: '.$helper);	
+		}		
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Load Helpers
+	 *
+	 * This is simply an alias to the above function in case the
+	 * user has written the plural form of this function.
+	 *
+	 * @access	public
+	 * @param	array
+	 * @return	void
+	 */
+	function helpers($helpers = array())
+	{
+		$this->helper($helpers);
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Load Plugin
+	 *
+	 * This function loads the specified plugin.
+	 *
+	 * @access	public
+	 * @param	array
+	 * @return	void
+	 */
+	function plugin($plugins = array())
+	{
+		if ( ! is_array($plugins))
+		{
+			$plugins = array($plugins);
+		}
+	
+		foreach ($plugins as $plugin)
+		{	
+			$plugin = strtolower(str_replace(EXT, '', str_replace('_pi', '', $plugin)).'_pi');		
+
+			if (isset($this->_ci_plugins[$plugin]))
+			{
+				continue;
+			}
+
+			if (file_exists(APPPATH.'plugins/'.$plugin.EXT))
+			{
+				include_once(APPPATH.'plugins/'.$plugin.EXT);	
+			}
+			else
+			{
+				if (file_exists(BASEPATH.'plugins/'.$plugin.EXT))
+				{
+					include_once(BASEPATH.'plugins/'.$plugin.EXT);	
+				}
+				else
+				{
+					show_error('Unable to load the requested file: plugins/'.$plugin.EXT);
+				}
+			}
+			
+			$this->_ci_plugins[$plugin] = TRUE;
+			log_message('debug', 'Plugin loaded: '.$plugin);
+		}		
+	}
+
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Load Plugins
+	 *
+	 * This is simply an alias to the above function in case the
+	 * user has written the plural form of this function.
+	 *
+	 * @access	public
+	 * @param	array
+	 * @return	void
+	 */
+	function plugins($plugins = array())
+	{
+		$this->plugin($plugins);
+	}
+		
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Loads a language file
+	 *
+	 * @access	public
+	 * @param	array
+	 * @param	string
+	 * @return	void
+	 */
+	function language($file = array(), $lang = '')
+	{
+		$CI =& get_instance();
+
+		if ( ! is_array($file))
+		{
+			$file = array($file);
+		}
+
+		foreach ($file as $langfile)
+		{	
+			$CI->lang->load($langfile, $lang);
+		}
+	}
+
+	/**
+	 * Loads language files for scaffolding
+	 *
+	 * @access	public
+	 * @param	string
+	 * @return	arra
+	 */
+	function scaffold_language($file = '', $lang = '', $return = FALSE)
+	{
+		$CI =& get_instance();
+		return $CI->lang->load($file, $lang, $return);
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Loads a config file
+	 *
+	 * @access	public
+	 * @param	string
+	 * @return	void
+	 */
+	function config($file = '', $use_sections = FALSE, $fail_gracefully = FALSE)
+	{			
+		$CI =& get_instance();
+		$CI->config->load($file, $use_sections, $fail_gracefully);
+	}
+
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Scaffolding Loader
+	 *
+	 * This initializing function works a bit different than the
+	 * others. It doesn't load the class.  Instead, it simply
+	 * sets a flag indicating that scaffolding is allowed to be
+	 * used.  The actual scaffolding function below is
+	 * called by the front controller based on whether the
+	 * second segment of the URL matches the "secret" scaffolding
+	 * word stored in the application/config/routes.php
+	 *
+	 * @access	public
+	 * @param	string
+	 * @return	void
+	 */	
+	function scaffolding($table = '')
+	{		
+		if ($table === FALSE)
+		{
+			show_error('You must include the name of the table you would like to access when you initialize scaffolding');
+		}
+		
+		$CI =& get_instance();
+		$CI->_ci_scaffolding = TRUE;
+		$CI->_ci_scaff_table = $table;
+	}
+
+	// --------------------------------------------------------------------
+		
+	/**
+	 * Loader
+	 *
+	 * This function is used to load views and files.
+	 * Variables are prefixed with _ci_ to avoid symbol collision with
+	 * variables made available to view files
+	 *
+	 * @access	private
+	 * @param	array
+	 * @return	void
+	 */
+	function _ci_load($_ci_data)
+	{
+		// Set the default data variables
+		foreach (array('_ci_view', '_ci_vars', '_ci_path', '_ci_return') as $_ci_val)
+		{
+			$$_ci_val = ( ! isset($_ci_data[$_ci_val])) ? FALSE : $_ci_data[$_ci_val];
+		}
+
+		// Set the path to the requested file
+		if ($_ci_path == '')
+		{
+			$_ci_ext = pathinfo($_ci_view, PATHINFO_EXTENSION);
+			$_ci_file = ($_ci_ext == '') ? $_ci_view.EXT : $_ci_view;
+			$_ci_path = $this->_ci_view_path.$_ci_file;
+		}
+		else
+		{
+			$_ci_x = explode('/', $_ci_path);
+			$_ci_file = end($_ci_x);
+		}
+		
+		if ( ! file_exists($_ci_path))
+		{
+			show_error('Unable to load the requested file: '.$_ci_file);
+		}
+	
+		// This allows anything loaded using $this->load (views, files, etc.)
+		// to become accessible from within the Controller and Model functions.
+		// Only needed when running PHP 5
+		
+		if ($this->_ci_is_instance())
+		{
+			$_ci_CI =& get_instance();
+			foreach (get_object_vars($_ci_CI) as $_ci_key => $_ci_var)
+			{
+				if ( ! isset($this->$_ci_key))
+				{
+					$this->$_ci_key =& $_ci_CI->$_ci_key;
+				}
+			}
+		}
+
+		/*
+		 * Extract and cache variables
+		 *
+		 * You can either set variables using the dedicated $this->load_vars()
+		 * function or via the second parameter of this function. We'll merge
+		 * the two types and cache them so that views that are embedded within
+		 * other views can have access to these variables.
+		 */	
+		if (is_array($_ci_vars))
+		{
+			$this->_ci_cached_vars = array_merge($this->_ci_cached_vars, $_ci_vars);
+		}
+		extract($this->_ci_cached_vars);
+				
+		/*
+		 * Buffer the output
+		 *
+		 * We buffer the output for two reasons:
+		 * 1. Speed. You get a significant speed boost.
+		 * 2. So that the final rendered template can be
+		 * post-processed by the output class.  Why do we
+		 * need post processing?  For one thing, in order to
+		 * show the elapsed page load time.  Unless we
+		 * can intercept the content right before it's sent to
+		 * the browser and then stop the timer it won't be accurate.
+		 */
+		ob_start();
+				
+		// If the PHP installation does not support short tags we'll
+		// do a little string replacement, changing the short tags
+		// to standard PHP echo statements.
+		
+		if ((bool) @ini_get('short_open_tag') === FALSE AND config_item('rewrite_short_tags') == TRUE)
+		{
+			echo eval('?>'.preg_replace("/;*\s*\?>/", "; ?>", str_replace('<?=', '<?php echo ', file_get_contents($_ci_path))));
+		}
+		else
+		{
+			include($_ci_path); // include() vs include_once() allows for multiple views with the same name
+		}
+		
+		log_message('debug', 'File loaded: '.$_ci_path);
+		
+		// Return the file data if requested
+		if ($_ci_return === TRUE)
+		{		
+			$buffer = ob_get_contents();
+			@ob_end_clean();
+			return $buffer;
+		}
+
+		/*
+		 * Flush the buffer... or buff the flusher?
+		 *
+		 * In order to permit views to be nested within
+		 * other views, we need to flush the content back out whenever
+		 * we are beyond the first level of output buffering so that
+		 * it can be seen and included properly by the first included
+		 * template and any subsequent ones. Oy!
+		 *
+		 */	
+		if (ob_get_level() > $this->_ci_ob_level + 1)
+		{
+			ob_end_flush();
+		}
+		else
+		{
+			// PHP 4 requires that we use a global
+			global $OUT;
+			$OUT->append_output(ob_get_contents());
+			@ob_end_clean();
+		}
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Load class
+	 *
+	 * This function loads the requested class.
+	 *
+	 * @access	private
+	 * @param 	string	the item that is being loaded
+	 * @param	mixed	any additional parameters
+	 * @param	string	an optional object name
+	 * @return 	void
+	 */
+	function _ci_load_class($class, $params = NULL, $object_name = NULL)
+	{	
+		// Get the class name, and while we're at it trim any slashes.  
+		// The directory path can be included as part of the class name, 
+		// but we don't want a leading slash
+		$class = str_replace(EXT, '', trim($class, '/'));
+	
+		// Was the path included with the class name?
+		// We look for a slash to determine this
+		$subdir = '';
+		if (strpos($class, '/') !== FALSE)
+		{
+			// explode the path so we can separate the filename from the path
+			$x = explode('/', $class);	
+			
+			// Reset the $class variable now that we know the actual filename
+			$class = end($x);
+			
+			// Kill the filename from the array
+			unset($x[count($x)-1]);
+			
+			// Glue the path back together, sans filename
+			$subdir = implode($x, '/').'/';
+		}
+
+		// We'll test for both lowercase and capitalized versions of the file name
+		foreach (array(ucfirst($class), strtolower($class)) as $class)
+		{
+			$subclass = APPPATH.'libraries/'.$subdir.config_item('subclass_prefix').$class.EXT;
+
+			// Is this a class extension request?			
+			if (file_exists($subclass))
+			{
+				$baseclass = BASEPATH.'libraries/'.ucfirst($class).EXT;
+				
+				if ( ! file_exists($baseclass))
+				{
+					log_message('error', "Unable to load the requested class: ".$class);
+					show_error("Unable to load the requested class: ".$class);
+				}
+
+				// Safety:  Was the class already loaded by a previous call?
+				if (in_array($subclass, $this->_ci_loaded_files))
+				{
+					// Before we deem this to be a duplicate request, let's see
+					// if a custom object name is being supplied.  If so, we'll
+					// return a new instance of the object
+					if ( ! is_null($object_name))
+					{
+						$CI =& get_instance();
+						if ( ! isset($CI->$object_name))
+						{
+							return $this->_ci_init_class($class, config_item('subclass_prefix'), $params, $object_name);			
+						}
+					}
+					
+					$is_duplicate = TRUE;
+					log_message('debug', $class." class already loaded. Second attempt ignored.");
+					return;
+				}
+	
+				include_once($baseclass);				
+				include_once($subclass);
+				$this->_ci_loaded_files[] = $subclass;
+	
+				return $this->_ci_init_class($class, config_item('subclass_prefix'), $params, $object_name);			
+			}
+		
+			// Lets search for the requested library file and load it.
+			$is_duplicate = FALSE;		
+			for ($i = 1; $i < 3; $i++)
+			{
+				$path = ($i % 2) ? APPPATH : BASEPATH;	
+				$filepath = $path.'libraries/'.$subdir.$class.EXT;
+				
+				// Does the file exist?  No?  Bummer...
+				if ( ! file_exists($filepath))
+				{
+					continue;
+				}
+				
+				// Safety:  Was the class already loaded by a previous call?
+				if (in_array($filepath, $this->_ci_loaded_files))
+				{
+					// Before we deem this to be a duplicate request, let's see
+					// if a custom object name is being supplied.  If so, we'll
+					// return a new instance of the object
+					if ( ! is_null($object_name))
+					{
+						$CI =& get_instance();
+						if ( ! isset($CI->$object_name))
+						{
+							return $this->_ci_init_class($class, '', $params, $object_name);
+						}
+					}
+				
+					$is_duplicate = TRUE;
+					log_message('debug', $class." class already loaded. Second attempt ignored.");
+					return;
+				}
+				
+				include_once($filepath);
+				$this->_ci_loaded_files[] = $filepath;
+				return $this->_ci_init_class($class, '', $params, $object_name);
+			}
+		} // END FOREACH
+
+		// One last attempt.  Maybe the library is in a subdirectory, but it wasn't specified?
+		if ($subdir == '')
+		{
+			$path = strtolower($class).'/'.$class;
+			return $this->_ci_load_class($path, $params);
+		}
+		
+		// If we got this far we were unable to find the requested class.
+		// We do not issue errors if the load call failed due to a duplicate request
+		if ($is_duplicate == FALSE)
+		{
+			log_message('error', "Unable to load the requested class: ".$class);
+			show_error("Unable to load the requested class: ".$class);
+		}
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Instantiates a class
+	 *
+	 * @access	private
+	 * @param	string
+	 * @param	string
+	 * @param	string	an optional object name
+	 * @return	null
+	 */
+	function _ci_init_class($class, $prefix = '', $config = FALSE, $object_name = NULL)
+	{	
+		// Is there an associated config file for this class?
+		if ($config === NULL)
+		{
+			// We test for both uppercase and lowercase, for servers that
+			// are case-sensitive with regard to file names
+			if (file_exists(APPPATH.'config/'.strtolower($class).EXT))
+			{
+				include_once(APPPATH.'config/'.strtolower($class).EXT);
+			}			
+			elseif (file_exists(APPPATH.'config/'.ucfirst(strtolower($class)).EXT))
+			{
+				include_once(APPPATH.'config/'.ucfirst(strtolower($class)).EXT);
+			}
+		}
+		
+		if ($prefix == '')
+		{			
+			if (class_exists('CI_'.$class)) 
+			{
+				$name = 'CI_'.$class;
+			}
+			elseif (class_exists(config_item('subclass_prefix').$class)) 
+			{
+				$name = config_item('subclass_prefix').$class;
+			}
+			else
+			{
+				$name = $class;
+			}
+		}
+		else
+		{
+			$name = $prefix.$class;
+		}
+		
+		// Is the class name valid?
+		if ( ! class_exists($name))
+		{
+			log_message('error', "Non-existent class: ".$name);
+			show_error("Non-existent class: ".$class);
+		}
+		
+		// Set the variable name we will assign the class to
+		// Was a custom class name supplied?  If so we'll use it
+		$class = strtolower($class);
+		
+		if (is_null($object_name))
+		{
+			$classvar = ( ! isset($this->_ci_varmap[$class])) ? $class : $this->_ci_varmap[$class];
+		}
+		else
+		{
+			$classvar = $object_name;
+		}
+
+		// Save the class name and object name		
+		$this->_ci_classes[$class] = $classvar;
+
+		// Instantiate the class		
+		$CI =& get_instance();
+		if ($config !== NULL)
+		{
+			$CI->$classvar = new $name($config);
+		}
+		else
+		{		
+			$CI->$classvar = new $name;
+		}	
+	} 	
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Autoloader
+	 *
+	 * The config/autoload.php file contains an array that permits sub-systems,
+	 * libraries, plugins, and helpers to be loaded automatically.
+	 *
+	 * @access	private
+	 * @param	array
+	 * @return	void
+	 */
+	function _ci_autoloader()
+	{	
+		include_once(APPPATH.'config/autoload'.EXT);
+		
+		if ( ! isset($autoload))
+		{
+			return FALSE;
+		}
+		
+		// Load any custom config file
+		if (count($autoload['config']) > 0)
+		{			
+			$CI =& get_instance();
+			foreach ($autoload['config'] as $key => $val)
+			{
+				$CI->config->load($val);
+			}
+		}		
+
+		// Autoload plugins, helpers and languages
+		foreach (array('helper', 'plugin', 'language') as $type)
+		{			
+			if (isset($autoload[$type]) AND count($autoload[$type]) > 0)
+			{
+				$this->$type($autoload[$type]);
+			}		
+		}
+
+		// A little tweak to remain backward compatible
+		// The $autoload['core'] item was deprecated
+		if ( ! isset($autoload['libraries']))
+		{
+			$autoload['libraries'] = $autoload['core'];
+		}
+		
+		// Load libraries
+		if (isset($autoload['libraries']) AND count($autoload['libraries']) > 0)
+		{
+			// Load the database driver.
+			if (in_array('database', $autoload['libraries']))
+			{
+				$this->database();
+				$autoload['libraries'] = array_diff($autoload['libraries'], array('database'));
+			}
+
+			// Load scaffolding
+			if (in_array('scaffolding', $autoload['libraries']))
+			{
+				$this->scaffolding();
+				$autoload['libraries'] = array_diff($autoload['libraries'], array('scaffolding'));
+			}
+		
+			// Load all other libraries
+			foreach ($autoload['libraries'] as $item)
+			{
+				$this->library($item);
+			}
+		}		
+
+		// Autoload models
+		if (isset($autoload['model']))
+		{
+			$this->model($autoload['model']);
+		}
+
+	}
+	
+	// --------------------------------------------------------------------
+
+	/**
+	 * Assign to Models
+	 *
+	 * Makes sure that anything loaded by the loader class (libraries, plugins, etc.)
+	 * will be available to models, if any exist.
+	 *
+	 * @access	private
+	 * @param	object
+	 * @return	array
+	 */
+	function _ci_assign_to_models()
+	{
+		if (count($this->_ci_models) == 0)
+		{
+			return;
+		}
+	
+		if ($this->_ci_is_instance())
+		{
+			$CI =& get_instance();
+			foreach ($this->_ci_models as $model)
+			{			
+				$CI->$model->_assign_libraries();
+			}
+		}
+		else
+		{		
+			foreach ($this->_ci_models as $model)
+			{			
+				$this->$model->_assign_libraries();
+			}
+		}
+	}  	
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Object to Array
+	 *
+	 * Takes an object as input and converts the class variables to array key/vals
+	 *
+	 * @access	private
+	 * @param	object
+	 * @return	array
+	 */
+	function _ci_object_to_array($object)
+	{
+		return (is_object($object)) ? get_object_vars($object) : $object;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Determines whether we should use the CI instance or $this
+	 *
+	 * @access	private
+	 * @return	bool
+	 */
+	function _ci_is_instance()
+	{
+		if ($this->_ci_is_php5 == TRUE)
+		{
+			return TRUE;
+		}
+	
+		global $CI;
+		return (is_object($CI)) ? TRUE : FALSE;
+	}
+
+}
+
+/* End of file Loader.php */
+/* Location: ./system/libraries/Loader.php */
\ No newline at end of file
diff --git a/system/core/Model.php b/system/core/Model.php
new file mode 100644
index 000000000..e9c2d24d1
--- /dev/null
+++ b/system/core/Model.php
@@ -0,0 +1,83 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		ExpressionEngine Dev Team
+ * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * CodeIgniter Model Class
+ *
+ * @package		CodeIgniter
+ * @subpackage	Libraries
+ * @category	Libraries
+ * @author		ExpressionEngine Dev Team
+ * @link		http://codeigniter.com/user_guide/libraries/config.html
+ */
+class Model {
+
+	var $_parent_name = '';
+
+	/**
+	 * Constructor
+	 *
+	 * @access public
+	 */
+	function Model()
+	{
+		// If the magic __get() or __set() methods are used in a Model references can't be used.
+		$this->_assign_libraries( (method_exists($this, '__get') OR method_exists($this, '__set')) ? FALSE : TRUE );
+		
+		// We don't want to assign the model object to itself when using the
+		// assign_libraries function below so we'll grab the name of the model parent
+		$this->_parent_name = ucfirst(get_class($this));
+		
+		log_message('debug', "Model Class Initialized");
+	}
+
+	/**
+	 * Assign Libraries
+	 *
+	 * Creates local references to all currently instantiated objects
+	 * so that any syntax that can be legally used in a controller
+	 * can be used within models.  
+	 *
+	 * @access private
+	 */	
+	function _assign_libraries($use_reference = TRUE)
+	{
+		$CI =& get_instance();				
+		foreach (array_keys(get_object_vars($CI)) as $key)
+		{
+			if ( ! isset($this->$key) AND $key != $this->_parent_name)
+			{			
+				// In some cases using references can cause
+				// problems so we'll conditionally use them
+				if ($use_reference == TRUE)
+				{
+					$this->$key = NULL; // Needed to prevent reference errors with some configurations
+					$this->$key =& $CI->$key;
+				}
+				else
+				{
+					$this->$key = $CI->$key;
+				}
+			}
+		}		
+	}
+
+}
+// END Model Class
+
+/* End of file Model.php */
+/* Location: ./system/libraries/Model.php */
\ No newline at end of file
diff --git a/system/core/Output.php b/system/core/Output.php
new file mode 100644
index 000000000..6a9a11677
--- /dev/null
+++ b/system/core/Output.php
@@ -0,0 +1,409 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		ExpressionEngine Dev Team
+ * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * Output Class
+ *
+ * Responsible for sending final output to browser
+ *
+ * @package		CodeIgniter
+ * @subpackage	Libraries
+ * @category	Output
+ * @author		ExpressionEngine Dev Team
+ * @link		http://codeigniter.com/user_guide/libraries/output.html
+ */
+class CI_Output {
+
+	var $final_output;
+	var $cache_expiration	= 0;
+	var $headers 			= array();
+	var $enable_profiler 	= FALSE;
+
+
+	function CI_Output()
+	{
+		log_message('debug', "Output Class Initialized");
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Get Output
+	 *
+	 * Returns the current output string
+	 *
+	 * @access	public
+	 * @return	string
+	 */	
+	function get_output()
+	{
+		return $this->final_output;
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Set Output
+	 *
+	 * Sets the output string
+	 *
+	 * @access	public
+	 * @param	string
+	 * @return	void
+	 */	
+	function set_output($output)
+	{
+		$this->final_output = $output;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Append Output
+	 *
+	 * Appends data onto the output string
+	 *
+	 * @access	public
+	 * @param	string
+	 * @return	void
+	 */	
+	function append_output($output)
+	{
+		if ($this->final_output == '')
+		{
+			$this->final_output = $output;
+		}
+		else
+		{
+			$this->final_output .= $output;
+		}
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Set Header
+	 *
+	 * Lets you set a server header which will be outputted with the final display.
+	 *
+	 * Note:  If a file is cached, headers will not be sent.  We need to figure out
+	 * how to permit header data to be saved with the cache data...
+	 *
+	 * @access	public
+	 * @param	string
+	 * @return	void
+	 */	
+	function set_header($header, $replace = TRUE)
+	{
+		$this->headers[] = array($header, $replace);
+	}
+
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Set HTTP Status Header
+	 * moved to Common procedural functions in 1.7.2
+	 * 
+	 * @access	public
+	 * @param	int 	the status code
+	 * @param	string	
+	 * @return	void
+	 */	
+	function set_status_header($code = '200', $text = '')
+	{
+		set_status_header($code, $text);
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Enable/disable Profiler
+	 *
+	 * @access	public
+	 * @param	bool
+	 * @return	void
+	 */	
+	function enable_profiler($val = TRUE)
+	{
+		$this->enable_profiler = (is_bool($val)) ? $val : TRUE;
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Set Cache
+	 *
+	 * @access	public
+	 * @param	integer
+	 * @return	void
+	 */	
+	function cache($time)
+	{
+		$this->cache_expiration = ( ! is_numeric($time)) ? 0 : $time;
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Display Output
+	 *
+	 * All "view" data is automatically put into this variable by the controller class:
+	 *
+	 * $this->final_output
+	 *
+	 * This function sends the finalized output data to the browser along
+	 * with any server headers and profile data.  It also stops the
+	 * benchmark timer so the page rendering speed and memory usage can be shown.
+	 *
+	 * @access	public
+	 * @return	mixed
+	 */		
+	function _display($output = '')
+	{	
+		// Note:  We use globals because we can't use $CI =& get_instance()
+		// since this function is sometimes called by the caching mechanism,
+		// which happens before the CI super object is available.
+		global $BM, $CFG;
+		
+		// --------------------------------------------------------------------
+		
+		// Set the output data
+		if ($output == '')
+		{
+			$output =& $this->final_output;
+		}
+		
+		// --------------------------------------------------------------------
+		
+		// Do we need to write a cache file?
+		if ($this->cache_expiration > 0)
+		{
+			$this->_write_cache($output);
+		}
+		
+		// --------------------------------------------------------------------
+
+		// Parse out the elapsed time and memory usage,
+		// then swap the pseudo-variables with the data
+
+		$elapsed = $BM->elapsed_time('total_execution_time_start', 'total_execution_time_end');		
+		$output = str_replace('{elapsed_time}', $elapsed, $output);
+		
+		$memory	 = ( ! function_exists('memory_get_usage')) ? '0' : round(memory_get_usage()/1024/1024, 2).'MB';
+		$output = str_replace('{memory_usage}', $memory, $output);		
+
+		// --------------------------------------------------------------------
+		
+		// Is compression requested?
+		if ($CFG->item('compress_output') === TRUE)
+		{
+			if (extension_loaded('zlib'))
+			{
+				if (isset($_SERVER['HTTP_ACCEPT_ENCODING']) AND strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== FALSE)
+				{
+					ob_start('ob_gzhandler');
+				}
+			}
+		}
+
+		// --------------------------------------------------------------------
+		
+		// Are there any server headers to send?
+		if (count($this->headers) > 0)
+		{
+			foreach ($this->headers as $header)
+			{
+				@header($header[0], $header[1]);
+			}
+		}		
+
+		// --------------------------------------------------------------------
+		
+		// Does the get_instance() function exist?
+		// If not we know we are dealing with a cache file so we'll
+		// simply echo out the data and exit.
+		if ( ! function_exists('get_instance'))
+		{
+			echo $output;
+			log_message('debug', "Final output sent to browser");
+			log_message('debug', "Total execution time: ".$elapsed);
+			return TRUE;
+		}
+	
+		// --------------------------------------------------------------------
+
+		// Grab the super object.  We'll need it in a moment...
+		$CI =& get_instance();
+		
+		// Do we need to generate profile data?
+		// If so, load the Profile class and run it.
+		if ($this->enable_profiler == TRUE)
+		{
+			$CI->load->library('profiler');				
+										
+			// If the output data contains closing </body> and </html> tags
+			// we will remove them and add them back after we insert the profile data
+			if (preg_match("|</body>.*?</html>|is", $output))
+			{
+				$output  = preg_replace("|</body>.*?</html>|is", '', $output);
+				$output .= $CI->profiler->run();
+				$output .= '</body></html>';
+			}
+			else
+			{
+				$output .= $CI->profiler->run();
+			}
+		}
+		
+		// --------------------------------------------------------------------
+
+		// Does the controller contain a function named _output()?
+		// If so send the output there.  Otherwise, echo it.
+		if (method_exists($CI, '_output'))
+		{
+			$CI->_output($output);
+		}
+		else
+		{
+			echo $output;  // Send it to the browser!
+		}
+		
+		log_message('debug', "Final output sent to browser");
+		log_message('debug', "Total execution time: ".$elapsed);		
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Write a Cache File
+	 *
+	 * @access	public
+	 * @return	void
+	 */	
+	function _write_cache($output)
+	{
+		$CI =& get_instance();	
+		$path = $CI->config->item('cache_path');
+	
+		$cache_path = ($path == '') ? BASEPATH.'cache/' : $path;
+		
+		if ( ! is_dir($cache_path) OR ! is_really_writable($cache_path))
+		{
+			return;
+		}
+		
+		$uri =	$CI->config->item('base_url').
+				$CI->config->item('index_page').
+				$CI->uri->uri_string();
+		
+		$cache_path .= md5($uri);
+
+		if ( ! $fp = @fopen($cache_path, FOPEN_WRITE_CREATE_DESTRUCTIVE))
+		{
+			log_message('error', "Unable to write cache file: ".$cache_path);
+			return;
+		}
+		
+		$expire = time() + ($this->cache_expiration * 60);
+		
+		if (flock($fp, LOCK_EX))
+		{
+			fwrite($fp, $expire.'TS--->'.$output);
+			flock($fp, LOCK_UN);
+		}
+		else
+		{
+			log_message('error', "Unable to secure a file lock for file at: ".$cache_path);
+			return;
+		}
+		fclose($fp);
+		@chmod($cache_path, FILE_WRITE_MODE);
+
+		log_message('debug', "Cache file written: ".$cache_path);
+	}
+
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Update/serve a cached file
+	 *
+	 * @access	public
+	 * @return	void
+	 */	
+	function _display_cache(&$CFG, &$URI)
+	{
+		$cache_path = ($CFG->item('cache_path') == '') ? BASEPATH.'cache/' : $CFG->item('cache_path');
+			
+		if ( ! is_dir($cache_path) OR ! is_really_writable($cache_path))
+		{
+			return FALSE;
+		}
+		
+		// Build the file path.  The file name is an MD5 hash of the full URI
+		$uri =	$CFG->item('base_url').
+				$CFG->item('index_page').
+				$URI->uri_string;
+				
+		$filepath = $cache_path.md5($uri);
+		
+		if ( ! @file_exists($filepath))
+		{
+			return FALSE;
+		}
+	
+		if ( ! $fp = @fopen($filepath, FOPEN_READ))
+		{
+			return FALSE;
+		}
+			
+		flock($fp, LOCK_SH);
+		
+		$cache = '';
+		if (filesize($filepath) > 0)
+		{
+			$cache = fread($fp, filesize($filepath));
+		}
+	
+		flock($fp, LOCK_UN);
+		fclose($fp);
+					
+		// Strip out the embedded timestamp		
+		if ( ! preg_match("/(\d+TS--->)/", $cache, $match))
+		{
+			return FALSE;
+		}
+		
+		// Has the file expired? If so we'll delete it.
+		if (time() >= trim(str_replace('TS--->', '', $match['1'])))
+		{ 		
+			@unlink($filepath);
+			log_message('debug', "Cache file has expired. File deleted");
+			return FALSE;
+		}
+
+		// Display the cache
+		$this->_display(str_replace($match['0'], '', $cache));
+		log_message('debug', "Cache file is current. Sending it to browser.");		
+		return TRUE;
+	}
+
+
+}
+// END Output Class
+
+/* End of file Output.php */
+/* Location: ./system/libraries/Output.php */
\ No newline at end of file
diff --git a/system/core/Router.php b/system/core/Router.php
new file mode 100644
index 000000000..20e69721d
--- /dev/null
+++ b/system/core/Router.php
@@ -0,0 +1,389 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		ExpressionEngine Dev Team
+ * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * Router Class
+ *
+ * Parses URIs and determines routing
+ *
+ * @package		CodeIgniter
+ * @subpackage	Libraries
+ * @author		ExpressionEngine Dev Team
+ * @category	Libraries
+ * @link		http://codeigniter.com/user_guide/general/routing.html
+ */
+class CI_Router {
+
+	var $config;	
+	var $routes 		= array();
+	var $error_routes	= array();
+	var $class			= '';
+	var $method			= 'index';
+	var $directory		= '';
+	var $uri_protocol 	= 'auto';
+	var $default_controller;
+	var $scaffolding_request = FALSE; // Must be set to FALSE
+	
+	/**
+	 * Constructor
+	 *
+	 * Runs the route mapping function.
+	 */
+	function CI_Router()
+	{
+		$this->config =& load_class('Config');
+		$this->uri =& load_class('URI');
+		$this->_set_routing();
+		log_message('debug', "Router Class Initialized");
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Set the route mapping
+	 *
+	 * This function determines what should be served based on the URI request,
+	 * as well as any "routes" that have been set in the routing config file.
+	 *
+	 * @access	private
+	 * @return	void
+	 */
+	function _set_routing()
+	{
+		// Are query strings enabled in the config file?
+		// If so, we're done since segment based URIs are not used with query strings.
+		if ($this->config->item('enable_query_strings') === TRUE AND isset($_GET[$this->config->item('controller_trigger')]))
+		{
+			$this->set_class(trim($this->uri->_filter_uri($_GET[$this->config->item('controller_trigger')])));
+
+			if (isset($_GET[$this->config->item('function_trigger')]))
+			{
+				$this->set_method(trim($this->uri->_filter_uri($_GET[$this->config->item('function_trigger')])));
+			}
+			
+			return;
+		}
+		
+		// Load the routes.php file.
+		@include(APPPATH.'config/routes'.EXT);
+		$this->routes = ( ! isset($route) OR ! is_array($route)) ? array() : $route;
+		unset($route);
+
+		// 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']);	
+		
+		// Fetch the complete URI string
+		$this->uri->_fetch_uri_string();
+	
+		// Is there a URI string? If not, the default controller specified in the "routes" file will be shown.
+		if ($this->uri->uri_string == '')
+		{
+			if ($this->default_controller === FALSE)
+			{
+				show_error("Unable to determine what should be displayed. A default route has not been specified in the routing file.");
+			}
+			
+			if (strpos($this->default_controller, '/') !== FALSE)
+			{
+				$x = explode('/', $this->default_controller);
+
+				$this->set_class(end($x));
+				$this->set_method('index');
+				$this->_set_request($x);
+			}
+			else
+			{
+				$this->set_class($this->default_controller);
+				$this->set_method('index');
+				$this->_set_request(array($this->default_controller, 'index'));
+			}
+
+			// re-index the routed segments array so it starts with 1 rather than 0
+			$this->uri->_reindex_segments();
+			
+			log_message('debug', "No URI present. Default controller set.");
+			return;
+		}
+		unset($this->routes['default_controller']);
+		
+		// Do we need to remove the URL suffix?
+		$this->uri->_remove_url_suffix();
+		
+		// Compile the segments into an array
+		$this->uri->_explode_segments();
+		
+		// Parse any custom routing that may exist
+		$this->_parse_routes();		
+		
+		// Re-index the segment array so that it starts with 1 rather than 0
+		$this->uri->_reindex_segments();
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Set the Route
+	 *
+	 * This function takes an array of URI segments as
+	 * input, and sets the current class/method
+	 *
+	 * @access	private
+	 * @param	array
+	 * @param	bool
+	 * @return	void
+	 */
+	function _set_request($segments = array())
+	{
+		$segments = $this->_validate_request($segments);
+		
+		if (count($segments) == 0)
+		{
+			return;
+		}
+						
+		$this->set_class($segments[0]);
+		
+		if (isset($segments[1]))
+		{
+			// A scaffolding request. No funny business with the URL
+			if ($this->routes['scaffolding_trigger'] == $segments[1] AND $segments[1] != '_ci_scaffolding')
+			{
+				$this->scaffolding_request = TRUE;
+				unset($this->routes['scaffolding_trigger']);
+			}
+			else
+			{
+				// A standard method request
+				$this->set_method($segments[1]);
+			}
+		}
+		else
+		{
+			// This lets the "routed" segment array identify that the default
+			// index method is being used.
+			$segments[1] = 'index';
+		}
+		
+		// Update our "routed" segment array to contain the segments.
+		// Note: If there is no custom routing, this array will be
+		// identical to $this->uri->segments
+		$this->uri->rsegments = $segments;
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Validates the supplied segments.  Attempts to determine the path to
+	 * the controller.
+	 *
+	 * @access	private
+	 * @param	array
+	 * @return	array
+	 */	
+	function _validate_request($segments)
+	{
+		// Does the requested controller exist in the root folder?
+		if (file_exists(APPPATH.'controllers/'.$segments[0].EXT))
+		{
+			return $segments;
+		}
+
+		// Is the controller in a sub-folder?
+		if (is_dir(APPPATH.'controllers/'.$segments[0]))
+		{		
+			// Set the directory and remove it from the segment array
+			$this->set_directory($segments[0]);
+			$segments = array_slice($segments, 1);
+			
+			if (count($segments) > 0)
+			{
+				// Does the requested controller exist in the sub-folder?
+				if ( ! file_exists(APPPATH.'controllers/'.$this->fetch_directory().$segments[0].EXT))
+				{
+					show_404($this->fetch_directory().$segments[0]);
+				}
+			}
+			else
+			{
+				$this->set_class($this->default_controller);
+				$this->set_method('index');
+			
+				// Does the default controller exist in the sub-folder?
+				if ( ! file_exists(APPPATH.'controllers/'.$this->fetch_directory().$this->default_controller.EXT))
+				{
+					$this->directory = '';
+					return array();
+				}
+			
+			}
+
+			return $segments;
+		}
+
+		// Can't find the requested controller...
+		show_404($segments[0]);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 *  Parse Routes
+	 *
+	 * This function matches any routes that may exist in
+	 * the config/routes.php file against the URI to
+	 * determine if the class/method need to be remapped.
+	 *
+	 * @access	private
+	 * @return	void
+	 */
+	function _parse_routes()
+	{
+		// Do we even have any custom routing to deal with?
+		// There is a default scaffolding trigger, so we'll look just for 1
+		if (count($this->routes) == 1)
+		{
+			$this->_set_request($this->uri->segments);
+			return;
+		}
+
+		// Turn the segment array into a URI string
+		$uri = implode('/', $this->uri->segments);
+
+		// Is there a literal match?  If so we're done
+		if (isset($this->routes[$uri]))
+		{
+			$this->_set_request(explode('/', $this->routes[$uri]));		
+			return;
+		}
+				
+		// Loop through the route array looking for wild-cards
+		foreach ($this->routes as $key => $val)
+		{						
+			// Convert wild-cards to RegEx
+			$key = str_replace(':any', '.+', str_replace(':num', '[0-9]+', $key));
+			
+			// Does the RegEx match?
+			if (preg_match('#^'.$key.'$#', $uri))
+			{			
+				// Do we have a back-reference?
+				if (strpos($val, '$') !== FALSE AND strpos($key, '(') !== FALSE)
+				{
+					$val = preg_replace('#^'.$key.'$#', $val, $uri);
+				}
+			
+				$this->_set_request(explode('/', $val));		
+				return;
+			}
+		}
+
+		// If we got this far it means we didn't encounter a
+		// matching route so we'll set the site default route
+		$this->_set_request($this->uri->segments);
+	}
+
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Set the class name
+	 *
+	 * @access	public
+	 * @param	string
+	 * @return	void
+	 */	
+	function set_class($class)
+	{
+		$this->class = $class;
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 * Fetch the current class
+	 *
+	 * @access	public
+	 * @return	string
+	 */	
+	function fetch_class()
+	{
+		return $this->class;
+	}
+	
+	// --------------------------------------------------------------------
+	
+	/**
+	 *  Set the method name
+	 *
+	 * @access	public
+	 * @param	string
+	 * @return	void
+	 */	
+	function set_method($method)
+	{
+		$this->method = $method;
+	}
+
+	// --------------------------------------------------------------------
+	
+	/**
+	 *  Fetch the current method
+	 *
+	 * @access	public
+	 * @return	string
+	 */	
+	function fetch_method()
+	{
+		if ($this->method == $this->fetch_class())
+		{
+			return 'index';
+		}
+
+		return $this->method;
+	}
+
+	// --------------------------------------------------------------------
+	
+	/**
+	 *  Set the directory name
+	 *
+	 * @access	public
+	 * @param	string
+	 * @return	void
+	 */	
+	function set_directory($dir)
+	{
+		$this->directory = $dir.'/';
+	}
+
+	// --------------------------------------------------------------------
+	
+	/**
+	 *  Fetch the sub-directory (if any) that contains the requested controller class
+	 *
+	 * @access	public
+	 * @return	string
+	 */	
+	function fetch_directory()
+	{
+		return $this->directory;
+	}
+
+}
+// END Router Class
+
+/* End of file Router.php */
+/* Location: ./system/libraries/Router.php */
\ No newline at end of file
diff --git a/system/core/URI.php b/system/core/URI.php
new file mode 100644
index 000000000..23efb38c1
--- /dev/null
+++ b/system/core/URI.php
@@ -0,0 +1,586 @@
+<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package		CodeIgniter
+ * @author		ExpressionEngine Dev Team
+ * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
+ * @license		http://codeigniter.com/user_guide/license.html
+ * @link		http://codeigniter.com
+ * @since		Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * URI Class
+ *
+ * Parses URIs and determines routing
+ *
+ * @package		CodeIgniter
+ * @subpackage	Libraries
+ * @category	URI
+ * @author		ExpressionEngine Dev Team
+ * @link		http://codeigniter.com/user_guide/libraries/uri.html
+ */
+class CI_URI {
+
+	var	$keyval	= array();
+	var $uri_string;
+	var $segments		= array();
+	var $rsegments		= array();
+
+	/**
+	 * Constructor
+	 *
+	 * Simply globalizes the $RTR object.  The front
+	 * loads the Router class early on so it's not available
+	 * normally as other classes are.
+	 *
+	 * @access	public
+	 */
+	function CI_URI()
+	{
+		$this->config =& load_class('Config');
+		log_message('debug', "URI Class Initialized");
+	}
+
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Get the URI String
+	 *
+	 * @access	private
+	 * @return	string
+	 */
+	function _fetch_uri_string()
+	{
+		if (strtoupper($this->config->item('uri_protocol')) == 'AUTO')
+		{
+			// If the URL has a question mark then it's simplest to just
+			// build the URI string from the zero index of the $_GET array.
+			// This avoids having to deal with $_SERVER variables, which
+			// can be unreliable in some environments
+			if (is_array($_GET) && count($_GET) == 1 && trim(key($_GET), '/') != '')
+			{
+				$this->uri_string = key($_GET);
+				return;
+			}
+
+			// Is there a PATH_INFO variable?
+			// Note: some servers seem to have trouble with getenv() so we'll test it two ways
+			$path = (isset($_SERVER['PATH_INFO'])) ? $_SERVER['PATH_INFO'] : @getenv('PATH_INFO');
+			if (trim($path, '/') != '' && $path != "/".SELF)
+			{
+				$this->uri_string = $path;
+				return;
+			}
+
+			// No PATH_INFO?... What about QUERY_STRING?
+			$path =  (isset($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : @getenv('QUERY_STRING');
+			if (trim($path, '/') != '')
+			{
+				$this->uri_string = $path;
+				return;
+			}
+
+			// No QUERY_STRING?... Maybe the ORIG_PATH_INFO variable exists?
+			$path = str_replace($_SERVER['SCRIPT_NAME'], '', (isset($_SERVER['ORIG_PATH_INFO'])) ? $_SERVER['ORIG_PATH_INFO'] : @getenv('ORIG_PATH_INFO'));
+			if (trim($path, '/') != '' && $path != "/".SELF)
+			{
+				// remove path and script information so we have good URI data
+				$this->uri_string = $path;
+				return;
+			}
+
+			// We've exhausted all our options...
+			$this->uri_string = '';
+		}
+		else
+		{
+			$uri = strtoupper($this->config->item('uri_protocol'));
+
+			if ($uri == 'REQUEST_URI')
+			{
+				$this->uri_string = $this->_parse_request_uri();
+				return;
+			}
+
+			$this->uri_string = (isset($_SERVER[$uri])) ? $_SERVER[$uri] : @getenv($uri);
+		}
+
+		// If the URI contains only a slash we'll kill it
+		if ($this->uri_string == '/')
+		{
+			$this->uri_string = '';
+		}
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Parse the REQUEST_URI
+	 *
+	 * Due to the way REQUEST_URI works it usually contains path info
+	 * that makes it unusable as URI data.  We'll trim off the unnecessary
+	 * data, hopefully arriving at a valid URI that we can use.
+	 *
+	 * @access	private
+	 * @return	string
+	 */
+	function _parse_request_uri()
+	{
+		if ( ! isset($_SERVER['REQUEST_URI']) OR $_SERVER['REQUEST_URI'] == '')
+		{
+			return '';
+		}
+
+		$request_uri = preg_replace("|/(.*)|", "\\1", str_replace("\\", "/", $_SERVER['REQUEST_URI']));
+
+		if ($request_uri == '' OR $request_uri == SELF)
+		{
+			return '';
+		}
+
+		$fc_path = FCPATH.SELF;
+		if (strpos($request_uri, '?') !== FALSE)
+		{
+			$fc_path .= '?';
+		}
+
+		$parsed_uri = explode("/", $request_uri);
+
+		$i = 0;
+		foreach(explode("/", $fc_path) as $segment)
+		{
+			if (isset($parsed_uri[$i]) && $segment == $parsed_uri[$i])
+			{
+				$i++;
+			}
+		}
+
+		$parsed_uri = implode("/", array_slice($parsed_uri, $i));
+
+		if ($parsed_uri != '')
+		{
+			$parsed_uri = '/'.$parsed_uri;
+		}
+
+		return $parsed_uri;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Filter segments for malicious characters
+	 *
+	 * @access	private
+	 * @param	string
+	 * @return	string
+	 */
+	function _filter_uri($str)
+	{
+		if ($str != '' && $this->config->item('permitted_uri_chars') != '' && $this->config->item('enable_query_strings') == FALSE)
+		{
+			// preg_quote() in PHP 5.3 escapes -, so the str_replace() and addition of - to preg_quote() is to maintain backwards
+			// compatibility as many are unaware of how characters in the permitted_uri_chars will be parsed as a regex pattern
+			if ( ! preg_match("|^[".str_replace(array('\\-', '\-'), '-', preg_quote($this->config->item('permitted_uri_chars'), '-'))."]+$|i", $str))
+			{
+				show_error('The URI you submitted has disallowed characters.', 400);
+			}
+		}
+
+		// Convert programatic characters to entities
+		$bad	= array('$', 		'(', 		')',	 	'%28', 		'%29');
+		$good	= array('&#36;',	'&#40;',	'&#41;',	'&#40;',	'&#41;');
+
+		return str_replace($bad, $good, $str);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Remove the suffix from the URL if needed
+	 *
+	 * @access	private
+	 * @return	void
+	 */
+	function _remove_url_suffix()
+	{
+		if  ($this->config->item('url_suffix') != "")
+		{
+			$this->uri_string = preg_replace("|".preg_quote($this->config->item('url_suffix'))."$|", "", $this->uri_string);
+		}
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Explode the URI Segments. The individual segments will
+	 * be stored in the $this->segments array.
+	 *
+	 * @access	private
+	 * @return	void
+	 */
+	function _explode_segments()
+	{
+		foreach(explode("/", preg_replace("|/*(.+?)/*$|", "\\1", $this->uri_string)) as $val)
+		{
+			// Filter segments for security
+			$val = trim($this->_filter_uri($val));
+
+			if ($val != '')
+			{
+				$this->segments[] = $val;
+			}
+		}
+	}
+
+	// --------------------------------------------------------------------
+	/**
+	 * Re-index Segments
+	 *
+	 * This function re-indexes the $this->segment array so that it
+	 * starts at 1 rather than 0.  Doing so makes it simpler to
+	 * use functions like $this->uri->segment(n) since there is
+	 * a 1:1 relationship between the segment array and the actual segments.
+	 *
+	 * @access	private
+	 * @return	void
+	 */
+	function _reindex_segments()
+	{
+		array_unshift($this->segments, NULL);
+		array_unshift($this->rsegments, NULL);
+		unset($this->segments[0]);
+		unset($this->rsegments[0]);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Fetch a URI Segment
+	 *
+	 * This function returns the URI segment based on the number provided.
+	 *
+	 * @access	public
+	 * @param	integer
+	 * @param	bool
+	 * @return	string
+	 */
+	function segment($n, $no_result = FALSE)
+	{
+		return ( ! isset($this->segments[$n])) ? $no_result : $this->segments[$n];
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Fetch a URI "routed" Segment
+	 *
+	 * This function returns the re-routed URI segment (assuming routing rules are used)
+	 * based on the number provided.  If there is no routing this function returns the
+	 * same result as $this->segment()
+	 *
+	 * @access	public
+	 * @param	integer
+	 * @param	bool
+	 * @return	string
+	 */
+	function rsegment($n, $no_result = FALSE)
+	{
+		return ( ! isset($this->rsegments[$n])) ? $no_result : $this->rsegments[$n];
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Generate a key value pair from the URI string
+	 *
+	 * This function generates and associative array of URI data starting
+	 * at the supplied segment. For example, if this is your URI:
+	 *
+	 *	example.com/user/search/name/joe/location/UK/gender/male
+	 *
+	 * You can use this function to generate an array with this prototype:
+	 *
+	 * array (
+	 *			name => joe
+	 *			location => UK
+	 *			gender => male
+	 *		 )
+	 *
+	 * @access	public
+	 * @param	integer	the starting segment number
+	 * @param	array	an array of default values
+	 * @return	array
+	 */
+	function uri_to_assoc($n = 3, $default = array())
+	{
+	 	return $this->_uri_to_assoc($n, $default, 'segment');
+	}
+	/**
+	 * Identical to above only it uses the re-routed segment array
+	 *
+	 */
+	function ruri_to_assoc($n = 3, $default = array())
+	{
+	 	return $this->_uri_to_assoc($n, $default, 'rsegment');
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Generate a key value pair from the URI string or Re-routed URI string
+	 *
+	 * @access	private
+	 * @param	integer	the starting segment number
+	 * @param	array	an array of default values
+	 * @param	string	which array we should use
+	 * @return	array
+	 */
+	function _uri_to_assoc($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', $which = 'segment')
+	{
+		if ($where == 'trailing')
+		{
+			$trailing	= '/';
+			$leading	= '';
+		}
+		elseif ($where == 'leading')
+		{
+			$leading	= '/';
+			$trailing	= '';
+		}
+		else
+		{
+			$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/libraries/URI.php */
\ No newline at end of file
diff --git a/system/core/index.html b/system/core/index.html
new file mode 100644
index 000000000..c942a79ce
--- /dev/null
+++ b/system/core/index.html
@@ -0,0 +1,10 @@
+<html>
+<head>
+	<title>403 Forbidden</title>
+</head>
+<body>
+
+<p>Directory access is forbidden.</p>
+
+</body>
+</html>
\ No newline at end of file