mainframe.php

<?php
/**
 * The primary directory where all shared resources reside
 */  
define('COMMONPATH', 'libs/common/');
	
	
/**
* 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.
* 
* This function is also found at system/core/CodeIgniter.php
*
* @access	public
* @param	string	the class name being requested
* @param	string	the directory where the class should be found
* @param	string	the class name prefix
* @return	object
*/
if ( ! function_exists('load_class'))
{
	function &load_class($class, $directory = 'libraries', $prefix = 'CI_')
	{
		static $_classes = array();

		// Does the class exist?  If so, we're done...
		if (isset($_classes[$class]))
		{
			return $_classes[$class];
		}

		$name = FALSE;

		// Look for the class first in the local application/libraries folder
		// then in the native system/libraries folder
		foreach (array(COMMONPATH, APPPATH, BASEPATH) as $path)
		{
			if (file_exists($path.$directory.'/'.$class.'.php'))
			{
				$name = $prefix.$class;

				if (class_exists($name) === FALSE)
				{
					require($path.$directory.'/'.$class.'.php');
				}

				break;
			}
		}

		// Is the request a class extension?  If so we load it too
		if (file_exists(COMMONPATH.$directory.'/'.config_item('subclass_prefix').$class.'.php'))
		{
			$name = config_item('subclass_prefix').$class;

			if (class_exists($name) === FALSE)
			{
				require(COMMONPATH.$directory.'/'.config_item('subclass_prefix').$class.'.php');
			}		
		}
		elseif (file_exists(APPPATH.$directory.'/'.config_item('subclass_prefix').$class.'.php'))
		{
			$name = config_item('subclass_prefix').$class;

			if (class_exists($name) === FALSE)
			{
				require(APPPATH.$directory.'/'.config_item('subclass_prefix').$class.'.php');
			}
		}

		// Did we find the class?
		if ($name === FALSE)
		{
			// Note: We use exit() rather then show_error() in order to avoid a
			// self-referencing loop with the Excptions class
			exit('Unable to locate the specified class: '.$class.'.php');
		}

		// Keep track of what we just loaded
		is_loaded($class);

		$_classes[$class] = new $name();
		return $_classes[$class];
	}
}



/**
* CodeIgniter
*
* An open source application development framework for PHP 5.1.6 or newer
*
* @package		CodeIgniter
* @author		ExpressionEngine Dev Team
* @copyright	Copyright (c) 2008 - 2011, EllisLab, Inc.
* @license		http://codeigniter.com/user_guide/license.html
* @link		http://codeigniter.com
* @since		Version 1.0
* @filesource
*/

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

/**
 * System Initialization File
 *
 * 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/
 */

/**
 * CodeIgniter Version
 *
 * @var string
 *
 */
define('CI_VERSION', '2.1.0');

/**
 * CodeIgniter Branch (Core = TRUE, Reactor = FALSE)
 *
 * @var boolean
 *
 */
define('CI_CORE', FALSE);

/*
 * ------------------------------------------------------
*  Load the global functions
* ------------------------------------------------------
*/
require(BASEPATH.'core/Common.php');

/*
 * ------------------------------------------------------
*  Load the framework constants
* ------------------------------------------------------
*/
if (defined('ENVIRONMENT') AND file_exists(APPPATH.'config/'.ENVIRONMENT.'/constants.php'))
{
	require(APPPATH.'config/'.ENVIRONMENT.'/constants.php');
}
else
{
	require(APPPATH.'config/constants.php');
}

/*
 * ------------------------------------------------------
*  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
}

/*
 * ------------------------------------------------------
*  Set the subclass_prefix
* ------------------------------------------------------
*
* Normally the "subclass_prefix" is set in the config file.
* The subclass prefix allows CI to know if a core class is
* being extended via a library in the local application
* "libraries" folder. Since CI allows config items to be
* overriden via data set in the main index. php file,
* before proceeding we need to know if a subclass_prefix
* override exists.  If so, we will set this value now,
* before any classes are loaded
* Note: Since the config file data is cached it doesn't
* hurt to load it here.
*/
if (isset($assign_to_config['subclass_prefix']) AND $assign_to_config['subclass_prefix'] != '')
{
	get_config(array('subclass_prefix' => $assign_to_config['subclass_prefix']));
}

/*
 * ------------------------------------------------------
*  Set a liberal script execution time limit
* ------------------------------------------------------
*/
if (function_exists("set_time_limit") == TRUE AND @ini_get("safe_mode") == 0)
{
	@set_time_limit(300);
}

/*
 * ------------------------------------------------------
*  Start the timer... tick tock tick tock...
* ------------------------------------------------------
*/
$BM =& load_class('Benchmark', 'core');
$BM->mark('total_execution_time_start');
$BM->mark('loading_time:_base_classes_start');

/*
 * ------------------------------------------------------
*  Instantiate the hooks class
* ------------------------------------------------------
*/
$EXT =& load_class('Hooks', 'core');

/*
 * ------------------------------------------------------
*  Is there a "pre_system" hook?
* ------------------------------------------------------
*/
$EXT->_call_hook('pre_system');

/*
 * ------------------------------------------------------
*  Instantiate the config class
* ------------------------------------------------------
*/
$CFG =& load_class('Config', 'core');

// Do we have any manually set config items in the index.php file?
if (isset($assign_to_config))
{
	$CFG->_assign_to_config($assign_to_config);
}

/*
 * ------------------------------------------------------
*  Instantiate the UTF-8 class
* ------------------------------------------------------
*
* Note: Order here is rather important as the UTF-8
* class needs to be used very early on, but it cannot
* properly determine if UTf-8 can be supported until
* after the Config class is instantiated.
*
*/

$UNI =& load_class('Utf8', 'core');

/*
 * ------------------------------------------------------
*  Instantiate the URI class
* ------------------------------------------------------
*/
$URI =& load_class('URI', 'core');

/*
 * ------------------------------------------------------
*  Instantiate the routing class and set the routing
* ------------------------------------------------------
*/
$RTR =& load_class('Router', 'core');
$RTR->_set_routing();

// Set any routing overrides that may exist in the main index file
if (isset($routing))
{
	$RTR->_set_overrides($routing);
}

/*
 * ------------------------------------------------------
*  Instantiate the output class
* ------------------------------------------------------
*/
$OUT =& load_class('Output', 'core');

/*
 * ------------------------------------------------------
*	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 security class for xss and csrf support
* -----------------------------------------------------
*/
$SEC =& load_class('Security', 'core');

/*
 * ------------------------------------------------------
*  Load the Input class and sanitize globals
* ------------------------------------------------------
*/
$IN	=& load_class('Input', 'core');

/*
 * ------------------------------------------------------
*  Load the Language class
* ------------------------------------------------------
*/
$LANG =& load_class('Lang', 'core');

/*
 * ------------------------------------------------------
*  Load the app controller and local controller
* ------------------------------------------------------
*
*/
// Load the base controller class
require BASEPATH.'core/Controller.php';

function &get_instance()
{
	return CI_Controller::get_instance();
}


if (file_exists(APPPATH.'core/'.$CFG->config['subclass_prefix'].'Controller.php'))
{
	require APPPATH.'core/'.$CFG->config['subclass_prefix'].'Controller.php';
}

// Load the Mainframe Controller
require_once COMMONPATH.'core/Mainframe_Controller.php';

// Load the local application controller
// Note: The Router class automatically validates the controller path using the router->_validate_request().
// If this include fails it means that the default controller in the Routes.php file is not resolving to something valid.

// NOTE -- Change from CodeIgniter.php to mainframe.php:
//Instead of APPPATH, the MY_Router.php method _get_base_path() is used to determine the correct path
//the controller resides in. 

if ( ! file_exists($RTR->_get_base_path().'controllers/'.$RTR->fetch_directory().$RTR->fetch_class().'.php'))
{
	show_error('Unable to load your default controller. Please make sure the controller specified in your Routes.php file is valid.');
}

include($RTR->_get_base_path().'controllers/'.$RTR->fetch_directory().$RTR->fetch_class().'.php');

// 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($class)
OR strncmp($method, '_', 1) == 0
OR in_array(strtolower($method), array_map('strtolower', get_class_methods('CI_Controller')))
)
{
	if ( ! empty($RTR->routes['404_override']))
	{
		$x = explode('/', $RTR->routes['404_override']);
		$class = $x[0];
		$method = (isset($x[1]) ? $x[1] : 'index');
		if ( ! class_exists($class))
		{
			if ( ! file_exists(APPPATH.'controllers/'.$class.'.php'))
			{
				show_404("{$class}/{$method}");
			}

			include_once(APPPATH.'controllers/'.$class.'.php');
		}
	}
	else
	{
		show_404("{$class}/{$method}");
	}
}

/*
 * ------------------------------------------------------
*  Is there a "pre_controller" hook?
* ------------------------------------------------------
*/
$EXT->_call_hook('pre_controller');

/*
 * ------------------------------------------------------
*  Instantiate the requested controller
* ------------------------------------------------------
*/
// Mark a start point so we can benchmark the controller
$BM->mark('controller_execution_time_( '.$class.' / '.$method.' )_start');

$CI = new $class();

/*
 * ------------------------------------------------------
*  Is there a "post_controller_constructor" hook?
* ------------------------------------------------------
*/
$EXT->_call_hook('post_controller_constructor');

/*
 * ------------------------------------------------------
*  Call the requested method
* ------------------------------------------------------
*/
// Is there a "remap" function? If so, we call it instead
if (method_exists($CI, '_remap'))
{
	$CI->_remap($method, array_slice($URI->rsegments, 2));
}
else
{
	// is_callable() returns TRUE on some versions of PHP 5 for private and protected
	// methods, so we'll use this workaround for consistent behavior
	if ( ! in_array(strtolower($method), array_map('strtolower', get_class_methods($CI))))
	{
		// Check and see if we are using a 404 override and use it.
		if ( ! empty($RTR->routes['404_override']))
		{
			$x = explode('/', $RTR->routes['404_override']);
			$class = $x[0];
			$method = (isset($x[1]) ? $x[1] : 'index');
			if ( ! class_exists($class))
			{
				if ( ! file_exists(APPPATH.'controllers/'.$class.'.php'))
				{
					show_404("{$class}/{$method}");
				}

				include_once(APPPATH.'controllers/'.$class.'.php');
				unset($CI);
				$CI = new $class();
			}
		}
		else
		{
			show_404("{$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/core/CodeIgniter.php */