/system/core/CodeIgniter.php

<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');

/**

 * CodeIgniter

 *

 * An open source application development framework for PHP 5.1.6 or newer

 *

 * NOTICE OF LICENSE

 * 

 * Licensed under the Open Software License version 3.0

 * 

 * This source file is subject to the Open Software License (OSL 3.0) that is

 * bundled with this package in the files license.txt / license.rst.  It is

 * also available through the world wide web at this URL:

 * http://opensource.org/licenses/OSL-3.0

 * If you did not receive a copy of the license and are unable to obtain it

 * through the world wide web, please send an email to

 * licensing@ellislab.com so we can send you a copy immediately.

 *

 * @package		CodeIgniter

 * @author		EllisLab Dev Team

 * @copyright	Copyright (c) 2008 - 2011, EllisLab, Inc. (http://ellislab.com/)

 * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)

 * @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		EllisLab Dev Team

 * @link		http://codeigniter.com/user_guide/

 */



/**

 * CodeIgniter Version

 *

 * @var string

 *

 */

	define('CI_VERSION', '3.0-dev');



/*

 * ------------------------------------------------------

 *  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 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.

	if ( ! file_exists(APPPATH.'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(APPPATH.'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 */