system/libraries/Loader.php - code-igniter-v3-giggi - Gitiles

 <?php  if (!defined('BASEPATH')) exit('No direct script access allowed');
 /**
  * Code Igniter
  *
  * An open source application development framework for PHP 4.3.2 or newer
  *
  * @package		CodeIgniter
  * @author		Rick Ellis
  * @copyright	Copyright (c) 2006, pMachine, Inc.
  * @license		http://www.codeignitor.com/user_guide/license.html
  * @link		http://www.codeigniter.com
  * @since		Version 1.0
  * @filesource
  */

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

 /**
  * Loader Class
  *
  * Loads views and files
  *
  * @package		CodeIgniter
  * @subpackage	Libraries
  * @author		Rick Ellis
  * @category	Loader
  * @link		http://www.codeigniter.com/user_guide/libraries/loader.html
  */
 class CI_Loader {

 	var $CI;
 	var $ob_level;
 	var $cached_vars	= array();
 	var $helpers		= array();
 	var $plugins		= array();
 	var $scripts		= array();
 	var $languages		= array();
 	var $view_path		= '';
 	var $models			= array();

 	/**
 	 * Constructor
 	 *
 	 * Sets the path to the view files and gets the initial output
 	 * buffering level
 	 *
 	 * @access	public
 	 */
 	function CI_Loader()
 	{
 		$this->CI =& get_instance();

 		$this->view_path = APPPATH.'views/';
 		$this->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	any initialization parameters
 	 * @return	void
 	 */
 	function library($class, $param = NULL)
 	{
 		if ($class == '')
 			return;

 		$this->_ci_load_class($class, $param);
 		$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	mixed	any initialization parameters
 	 * @return	void
 	 */
 	function model($model, $name = '', $db_conn = FALSE)
 	{
 		if ($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->models, TRUE))
 		{
 			return;
 		}

 		if (isset($this->CI->$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 ($db_conn !== FALSE)
 		{
 			if ($db_conn === TRUE)
 				$db_conn = '';

 			$this->CI->load->database($db_conn, FALSE, TRUE);
 		}

 		if ( ! class_exists('Model'))
 		{
 			require_once(BASEPATH.'libraries/Model'.EXT);
 		}

 		require_once(APPPATH.'models/'.$path.$model.EXT);

 		$model = ucfirst($model);
 		$this->CI->$name = new $model();
 		$this->models[] = $name;
 		$this->_ci_assign_to_models();
 	}

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

 	/**
 	 * 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 = FALSE)
 	{
 		require_once(BASEPATH.'database/DB'.EXT);

 		if ($return === TRUE)
 		{
 			return DB($params, $return, $active_record);
 		}
 		else
 		{
 			DB($params, $return, $active_record);
 			$this->_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 retun 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('view' => $view, 'vars' => $this->_ci_object_to_array($vars), '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('path' => $path, 'return' => $return));
 	}

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

 	/**
 	 * Set Variables
 	 *
 	 * Once variables are set they become availabe within
 	 * the controller class and its "view" files.
 	 *
 	 * @access	public
 	 * @param	array
 	 * @return	void
 	 */
 	function vars($vars = array())
 	{
 		$vars = $this->_ci_object_to_array($vars);

 		if (is_array($vars) AND count($vars) > 0)
 		{
 			foreach ($vars as $key => $val)
 			{
 				$this->cached_vars[$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 $helper)
 		{
 			if (isset($this->helpers[$helper]))
 			{
 				continue;
 			}

 			$helper = strtolower(str_replace(EXT, '', str_replace('_helper', '', $helper)).'_helper');

 			if (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);
 				}
 			}

 			$this->helpers[$helper] = TRUE;
 		}

 		log_message('debug', 'Helpers loaded: '.implode(', ', $helpers));
 	}

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

 	/**
 	 * 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 $plugin)
 		{
 			if (isset($this->plugins[$plugin]))
 			{
 				continue;
 			}

 			$plugin = strtolower(str_replace(EXT, '', str_replace('_plugin.', '', $plugin)).'_pi');

 			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);
 				}
 			}

 			$this->plugins[$plugin] = TRUE;
 		}

 		log_message('debug', 'Plugins loaded: '.implode(', ', $plugins));
 	}

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

 	/**
 	 * 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);
 	}

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

 	/**
 	 * Load Script
 	 *
 	 * This function loads the specified include file from the
 	 * application/scripts/ folder.
 	 *
 	 * NOTE:  This feature has been deprecated but it will remain available
 	 * for legacy users.
 	 *
 	 * @access	public
 	 * @param	array
 	 * @return	void
 	 */
 	function script($scripts = array())
 	{
 		if ( ! is_array($scripts))
 		{
 			$scripts = array($scripts);
 		}

 		foreach ($scripts as $script)
 		{
 			if (isset($this->scripts[$script]))
 			{
 				continue;
 			}

 			$script = strtolower(str_replace(EXT, '', $script));

 			if ( ! file_exists(APPPATH.'scripts/'.$script.EXT))
 			{
 				show_error('Unable to load the requested script: scripts/'.$script.EXT);
 			}

 			include_once(APPPATH.'scripts/'.$script.EXT);

 			$this->scripts[$script] = TRUE;
 		}

 		log_message('debug', 'Scripts loaded: '.implode(', ', $scripts));
 	}

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

 	/**
 	 * Loads a language file
 	 *
 	 * @access	public
 	 * @param	string
 	 * @return	void
 	 */
 	function language($file = '', $lang = '', $return = FALSE)
 	{
 		return $this->CI->lang->load($file, $lang, $return);
 	}

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

 	/**
 	 * Loads a config file
 	 *
 	 * @access	public
 	 * @param	string
 	 * @return	void
 	 */
 	function config($file = '')
 	{
 		$this->CI->config->load($file);
 	}

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

 	/**
 	 * 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 access when you initialize scaffolding');
 		}

 		$this->CI->_ci_scaffolding = TRUE;
 		$this->CI->_ci_scaff_table = $table;
 	}

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

 	/**
 	 * Loader
 	 *
 	 * This function is used to load views and files.
 	 *
 	 * @access	private
 	 * @param	array
 	 * @return	void
 	 */
 	function _ci_load($data)
 	{
 		// This allows anything loaded using $this->load (viwes, files, etc.)
 		// to become accessible from within the Controller and Model functions.
 		foreach (get_object_vars($this->CI) as $key => $var)
 		{
 			if (is_object($var))
 			{
 				$this->$key =& $this->CI->$key;
 			}
 		}

 		// Set the default data variables
 		foreach (array('view', 'vars', 'path', 'return') as $val)
 		{
 			$$val = ( ! isset($data[$val])) ? FALSE : $data[$val];
 		}

 		/*
 		 * Extract and cache variables
 		 *
 		 * You can either set variables using the dedicated $this->load_vars()
 		 * function or via the second parameter of this function. We'll merge
 		 * the two types and cache them so that views that are embedded within
 		 * other views can have access to these variables.
 		 */
 		if (is_array($vars))
 		{
 			$this->cached_vars = array_merge($this->cached_vars, $vars);
 		}
 		extract($this->cached_vars);

 		// Set the path to the requested file
 		if ($path == '')
 		{
 			$ext = pathinfo($view, PATHINFO_EXTENSION);
 			$file = ($ext == '') ? $view.EXT : $view;
 			$path = $this->view_path.$file;
 		}
 		else
 		{
 			$x = explode('/', $path);
 			$file = end($x);
 		}

 		/*
 		 * 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 acurate.
 		 */
 		if ( ! file_exists($path))
 		{
 			show_error('Unable to load the requested file: '.$file);
 		}

 		ob_start();

 		include($path);
 		log_message('debug', 'File loaded: '.$path);

 		// Return the file data if requested to
 		if ($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->ob_level + 1)
 		{
 			ob_end_flush();
 		}
 		else
 		{
 			$this->CI->output->set_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
 	 * @return 	void
 	 */
 	function _ci_load_class($class, $params = NULL)
 	{
 		// Prep the class name
 		$class = strtolower(str_replace(EXT, '', $class));

 		// Bug fix for backward compat.
 		// Kill this at some point in the future
 		if ($class == 'unit_test')
 		{
 			$class = 'unit';
 		}

 		// Is this a class extension request?
 		if (substr($class, 0, 3) == 'my_')
 		{
 			$class = preg_replace("/my_(.+)/", "\\1", $class);
 			$extend = TRUE;
 		}
 		else
 		{
 			$extend = FALSE;
 		}

 		// Are we extending one of the base classes?
 		if ($extend == TRUE)
 		{
 			// Load the requested library from the main system/libraries folder
 			if (file_exists(BASEPATH.'libraries/'.ucfirst($class).EXT))
 			{
 				include_once(BASEPATH.'libraries/'.ucfirst($class).EXT);
 			}

 			// Now look for a matching library
 			foreach (array(ucfirst($class), $class) as $filename)
 			{
 				if (file_exists(APPPATH.'libraries/'.$filename.EXT))
 				{
 					include_once(APPPATH.'libraries/'.$filename.EXT);
 				}
 			}

 			return $this->_ci_init_class($filename, 'MY_', $params);
 		}
 		else
 		{
 			// Lets search for the requested library file and load it.
 			// For backward compatibility we'll test for filenames that are
 			// both uppercase and lower.
 			foreach (array(ucfirst($class), $class) as $filename)
 			{
 				for ($i = 1; $i < 3; $i++)
 				{
 					$path = ($i % 2) ? APPPATH : BASEPATH;

 					if (file_exists($path.'libraries/'.$filename.EXT))
 					{
 						include_once($path.'libraries/'.$filename.EXT);
 						return $this->_ci_init_class($filename, '', $params);
 					}
 				}
 			}
 		}

 		// If we got this far we were unable to find the requested class
 		log_message('error', "Unable to load the requested class: ".$class);
 		show_error("Unable to load the class: ".$class);
 	}

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

 	/**
 	 * Instantiates a class
 	 *
 	 * @access	private
 	 * @param	string
 	 * @param	string
 	 * @return	null
 	 */
 	function _ci_init_class($class, $prefix = '', $config = NULL)
 	{
 		// Is there an associated config file for this class?
 		if ($config == NULL)
 		{
 			if (file_exists(APPPATH.'config/'.$class.EXT))
 			{
 				include_once(APPPATH.'config/'.$class.EXT);
 			}
 		}

 		if ($prefix == '')
 		{
 			$name = ( ! class_exists($class)) ? 'CI_'.$class : $class;
 		}
 		else
 		{
 			$name = $prefix.$class;
 		}

 		$varname = ( ! isset($remap[$class])) ? $class : $remap[$class];
 		$varname = strtolower($varname);

 		// Instantiate the class
 		if ($config !== NULL)
 		{
 			$this->CI->$varname = new $name($config);
 		}
 		else
 		{
 			$this->CI->$varname = 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 custome config file
 		if (count($autoload['config']) > 0)
 		{
 			foreach ($autoload['config'] as $key => $val)
 			{
 				$this->CI->config->load($val);
 			}
 		}

 		// Load plugins, helpers, and scripts
 		foreach (array('helper', 'plugin', 'script') 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)
 		{
 			if (in_array('database', $autoload['libraries']))
 			{
 				$this->database();
 				$autoload['libraries'] = array_diff($autoload['libraries'], array('database'));
 			}

 			if (in_array('model', $autoload['libraries']))
 			{
 				$this->model();
 				$autoload['libraries'] = array_diff($autoload['libraries'], array('model'));
 			}

 			if (in_array('scaffolding', $autoload['libraries']))
 			{
 				$this->scaffolding();
 				$autoload['libraries'] = array_diff($autoload['libraries'], array('scaffolding'));
 			}

 			foreach ($autoload['libraries'] as $item)
 			{
 				$this->library($item);
 			}
 		}
 	}

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

 	/**
 	 * Assign to Models
 	 *
 	 * Makes sure that anything loaded by the loader class (libraries, plugins, etc.)
 	 * will be available to modles, if any exist.
 	 *
 	 * @access	public
 	 * @param	object
 	 * @return	array
 	 */
 	function _ci_assign_to_models()
 	{
 		if (count($this->models) == 0)
 		{
 			return;
 		}
 		foreach ($this->models as $model)
 		{
 			$this->CI->$model->_assign_libraries();
 		}
 	}

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

 	/**
 	 * Object to Array
 	 *
 	 * Takes an object as input and convers the class variables to array key/vals
 	 *
 	 * @access	public
 	 * @param	object
 	 * @return	array
 	 */
 	function _ci_object_to_array($object)
 	{
 		return (is_object($object)) ? get_object_vars($object) : $object;
 	}


 }
 ?>
	<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
	/**
	* Code Igniter
	*
	* An open source application development framework for PHP 4.3.2 or newer
	*
	* @package CodeIgniter
	* @author Rick Ellis
	* @copyright Copyright (c) 2006, pMachine, Inc.
	* @license http://www.codeignitor.com/user_guide/license.html
	* @link http://www.codeigniter.com
	* @since Version 1.0
	* @filesource
	*/

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

	/**
	* Loader Class
	*
	* Loads views and files
	*
	* @package CodeIgniter
	* @subpackage Libraries
	* @author Rick Ellis
	* @category Loader
	* @link http://www.codeigniter.com/user_guide/libraries/loader.html
	*/
	class CI_Loader {

	var $CI;
	var $ob_level;
	var $cached_vars = array();
	var $helpers = array();
	var $plugins = array();
	var $scripts = array();
	var $languages = array();
	var $view_path = '';
	var $models = array();

	/**
	* Constructor
	*
	* Sets the path to the view files and gets the initial output
	* buffering level
	*
	* @access public
	*/
	function CI_Loader()
	{
	$this->CI =& get_instance();

	$this->view_path = APPPATH.'views/';
	$this->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 any initialization parameters
	* @return void
	*/
	function library($class, $param = NULL)
	{
	if ($class == '')
	return;

	$this->_ci_load_class($class, $param);
	$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 mixed any initialization parameters
	* @return void
	*/
	function model($model, $name = '', $db_conn = FALSE)
	{
	if ($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->models, TRUE))
	{
	return;
	}

	if (isset($this->CI->$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 ($db_conn !== FALSE)
	{
	if ($db_conn === TRUE)
	$db_conn = '';

	$this->CI->load->database($db_conn, FALSE, TRUE);
	}

	if ( ! class_exists('Model'))
	{
	require_once(BASEPATH.'libraries/Model'.EXT);
	}

	require_once(APPPATH.'models/'.$path.$model.EXT);

	$model = ucfirst($model);
	$this->CI->$name = new $model();
	$this->models[] = $name;
	$this->_ci_assign_to_models();
	}

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

	/**
	* 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 = FALSE)
	{
	require_once(BASEPATH.'database/DB'.EXT);

	if ($return === TRUE)
	{
	return DB($params, $return, $active_record);
	}
	else
	{
	DB($params, $return, $active_record);
	$this->_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 retun 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('view' => $view, 'vars' => $this->_ci_object_to_array($vars), '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('path' => $path, 'return' => $return));
	}

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

	/**
	* Set Variables
	*
	* Once variables are set they become availabe within
	* the controller class and its "view" files.
	*
	* @access public
	* @param array
	* @return void
	*/
	function vars($vars = array())
	{
	$vars = $this->_ci_object_to_array($vars);

	if (is_array($vars) AND count($vars) > 0)
	{
	foreach ($vars as $key => $val)
	{
	$this->cached_vars[$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 $helper)
	{
	if (isset($this->helpers[$helper]))
	{
	continue;
	}

	$helper = strtolower(str_replace(EXT, '', str_replace('_helper', '', $helper)).'_helper');

	if (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);
	}
	}

	$this->helpers[$helper] = TRUE;
	}

	log_message('debug', 'Helpers loaded: '.implode(', ', $helpers));
	}

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

	/**
	* 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 $plugin)
	{
	if (isset($this->plugins[$plugin]))
	{
	continue;
	}

	$plugin = strtolower(str_replace(EXT, '', str_replace('_plugin.', '', $plugin)).'_pi');

	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);
	}
	}

	$this->plugins[$plugin] = TRUE;
	}

	log_message('debug', 'Plugins loaded: '.implode(', ', $plugins));
	}

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

	/**
	* 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);
	}

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

	/**
	* Load Script
	*
	* This function loads the specified include file from the
	* application/scripts/ folder.
	*
	* NOTE: This feature has been deprecated but it will remain available
	* for legacy users.
	*
	* @access public
	* @param array
	* @return void
	*/
	function script($scripts = array())
	{
	if ( ! is_array($scripts))
	{
	$scripts = array($scripts);
	}

	foreach ($scripts as $script)
	{
	if (isset($this->scripts[$script]))
	{
	continue;
	}

	$script = strtolower(str_replace(EXT, '', $script));

	if ( ! file_exists(APPPATH.'scripts/'.$script.EXT))
	{
	show_error('Unable to load the requested script: scripts/'.$script.EXT);
	}

	include_once(APPPATH.'scripts/'.$script.EXT);

	$this->scripts[$script] = TRUE;
	}

	log_message('debug', 'Scripts loaded: '.implode(', ', $scripts));
	}

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

	/**
	* Loads a language file
	*
	* @access public
	* @param string
	* @return void
	*/
	function language($file = '', $lang = '', $return = FALSE)
	{
	return $this->CI->lang->load($file, $lang, $return);
	}

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

	/**
	* Loads a config file
	*
	* @access public
	* @param string
	* @return void
	*/
	function config($file = '')
	{
	$this->CI->config->load($file);
	}

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

	/**
	* 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 access when you initialize scaffolding');
	}

	$this->CI->_ci_scaffolding = TRUE;
	$this->CI->_ci_scaff_table = $table;
	}

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

	/**
	* Loader
	*
	* This function is used to load views and files.
	*
	* @access private
	* @param array
	* @return void
	*/
	function _ci_load($data)
	{
	// This allows anything loaded using $this->load (viwes, files, etc.)
	// to become accessible from within the Controller and Model functions.
	foreach (get_object_vars($this->CI) as $key => $var)
	{
	if (is_object($var))
	{
	$this->$key =& $this->CI->$key;
	}
	}

	// Set the default data variables
	foreach (array('view', 'vars', 'path', 'return') as $val)
	{
	$$val = ( ! isset($data[$val])) ? FALSE : $data[$val];
	}

	/*
	* Extract and cache variables
	*
	* You can either set variables using the dedicated $this->load_vars()
	* function or via the second parameter of this function. We'll merge
	* the two types and cache them so that views that are embedded within
	* other views can have access to these variables.
	*/
	if (is_array($vars))
	{
	$this->cached_vars = array_merge($this->cached_vars, $vars);
	}
	extract($this->cached_vars);

	// Set the path to the requested file
	if ($path == '')
	{
	$ext = pathinfo($view, PATHINFO_EXTENSION);
	$file = ($ext == '') ? $view.EXT : $view;
	$path = $this->view_path.$file;
	}
	else
	{
	$x = explode('/', $path);
	$file = end($x);
	}

	/*
	* 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 acurate.
	*/
	if ( ! file_exists($path))
	{
	show_error('Unable to load the requested file: '.$file);
	}

	ob_start();

	include($path);
	log_message('debug', 'File loaded: '.$path);

	// Return the file data if requested to
	if ($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->ob_level + 1)
	{
	ob_end_flush();
	}
	else
	{
	$this->CI->output->set_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
	* @return void
	*/
	function _ci_load_class($class, $params = NULL)
	{
	// Prep the class name
	$class = strtolower(str_replace(EXT, '', $class));

	// Bug fix for backward compat.
	// Kill this at some point in the future
	if ($class == 'unit_test')
	{
	$class = 'unit';
	}

	// Is this a class extension request?
	if (substr($class, 0, 3) == 'my_')
	{
	$class = preg_replace("/my_(.+)/", "\\1", $class);
	$extend = TRUE;
	}
	else
	{
	$extend = FALSE;
	}

	// Are we extending one of the base classes?
	if ($extend == TRUE)
	{
	// Load the requested library from the main system/libraries folder
	if (file_exists(BASEPATH.'libraries/'.ucfirst($class).EXT))
	{
	include_once(BASEPATH.'libraries/'.ucfirst($class).EXT);
	}

	// Now look for a matching library
	foreach (array(ucfirst($class), $class) as $filename)
	{
	if (file_exists(APPPATH.'libraries/'.$filename.EXT))
	{
	include_once(APPPATH.'libraries/'.$filename.EXT);
	}
	}

	return $this->_ci_init_class($filename, 'MY_', $params);
	}
	else
	{
	// Lets search for the requested library file and load it.
	// For backward compatibility we'll test for filenames that are
	// both uppercase and lower.
	foreach (array(ucfirst($class), $class) as $filename)
	{
	for ($i = 1; $i < 3; $i++)
	{
	$path = ($i % 2) ? APPPATH : BASEPATH;

	if (file_exists($path.'libraries/'.$filename.EXT))
	{
	include_once($path.'libraries/'.$filename.EXT);
	return $this->_ci_init_class($filename, '', $params);
	}
	}
	}
	}

	// If we got this far we were unable to find the requested class
	log_message('error', "Unable to load the requested class: ".$class);
	show_error("Unable to load the class: ".$class);
	}

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

	/**
	* Instantiates a class
	*
	* @access private
	* @param string
	* @param string
	* @return null
	*/
	function _ci_init_class($class, $prefix = '', $config = NULL)
	{
	// Is there an associated config file for this class?
	if ($config == NULL)
	{
	if (file_exists(APPPATH.'config/'.$class.EXT))
	{
	include_once(APPPATH.'config/'.$class.EXT);
	}
	}

	if ($prefix == '')
	{
	$name = ( ! class_exists($class)) ? 'CI_'.$class : $class;
	}
	else
	{
	$name = $prefix.$class;
	}

	$varname = ( ! isset($remap[$class])) ? $class : $remap[$class];
	$varname = strtolower($varname);

	// Instantiate the class
	if ($config !== NULL)
	{
	$this->CI->$varname = new $name($config);
	}
	else
	{
	$this->CI->$varname = 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 custome config file
	if (count($autoload['config']) > 0)
	{
	foreach ($autoload['config'] as $key => $val)
	{
	$this->CI->config->load($val);
	}
	}

	// Load plugins, helpers, and scripts
	foreach (array('helper', 'plugin', 'script') 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)
	{
	if (in_array('database', $autoload['libraries']))
	{
	$this->database();
	$autoload['libraries'] = array_diff($autoload['libraries'], array('database'));
	}

	if (in_array('model', $autoload['libraries']))
	{
	$this->model();
	$autoload['libraries'] = array_diff($autoload['libraries'], array('model'));
	}

	if (in_array('scaffolding', $autoload['libraries']))
	{
	$this->scaffolding();
	$autoload['libraries'] = array_diff($autoload['libraries'], array('scaffolding'));
	}

	foreach ($autoload['libraries'] as $item)
	{
	$this->library($item);
	}
	}
	}

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

	/**
	* Assign to Models
	*
	* Makes sure that anything loaded by the loader class (libraries, plugins, etc.)
	* will be available to modles, if any exist.
	*
	* @access public
	* @param object
	* @return array
	*/
	function _ci_assign_to_models()
	{
	if (count($this->models) == 0)
	{
	return;
	}
	foreach ($this->models as $model)
	{
	$this->CI->$model->_assign_libraries();
	}
	}

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

	/**
	* Object to Array
	*
	* Takes an object as input and convers the class variables to array key/vals
	*
	* @access public
	* @param object
	* @return array
	*/
	function _ci_object_to_array($object)
	{
	return (is_object($object)) ? get_object_vars($object) : $object;
	}


	}
	?>