368 行
11 KiB
PHP
368 行
11 KiB
PHP
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP 5.1.6 or newer
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*
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* @package CodeIgniter
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* @author ExpressionEngine Dev Team
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* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
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* @license http://codeigniter.com/user_guide/license.html
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* @link http://codeigniter.com
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* @since Version 1.0
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* @filesource
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*/
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// ------------------------------------------------------------------------
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/**
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* System Initialization File
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*
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* Loads the base classes and executes the request.
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*
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* @package CodeIgniter
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* @subpackage codeigniter
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* @category Front-controller
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* @author ExpressionEngine Dev Team
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* @link http://codeigniter.com/user_guide/
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*/
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/*
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* ------------------------------------------------------
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* Define the CodeIgniter Version
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* ------------------------------------------------------
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*/
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define('CI_VERSION', '2.0.1');
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/*
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* ------------------------------------------------------
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* Define the CodeIgniter Branch (Core = TRUE, Reactor = FALSE)
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* ------------------------------------------------------
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*/
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define('CI_CORE', FALSE);
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/*
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* ------------------------------------------------------
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* Load the global functions
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* ------------------------------------------------------
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*/
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require(BASEPATH.'core/Common'.EXT);
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/*
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* ------------------------------------------------------
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* Load the framework constants
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* ------------------------------------------------------
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*/
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require(APPPATH.'config/constants'.EXT);
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/*
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* ------------------------------------------------------
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* Define a custom error handler so we can log PHP errors
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* ------------------------------------------------------
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*/
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set_error_handler('_exception_handler');
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if ( ! is_php('5.3'))
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{
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@set_magic_quotes_runtime(0); // Kill magic quotes
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}
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/*
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* ------------------------------------------------------
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* Set the subclass_prefix
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* ------------------------------------------------------
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*
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* Normally the "subclass_prefix" is set in the config file.
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* The subclass prefix allows CI to know if a core class is
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* being extended via a library in the local application
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* "libraries" folder. Since CI allows config items to be
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* overriden via data set in the main index. php file,
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* before proceeding we need to know if a subclass_prefix
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* override exists. If so, we will set this value now,
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* before any classes are loaded
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* Note: Since the config file data is cached it doesn't
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* hurt to load it here.
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*/
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if (isset($assign_to_config['subclass_prefix']) AND $assign_to_config['subclass_prefix'] != '')
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{
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get_config(array('subclass_prefix' => $assign_to_config['subclass_prefix']));
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}
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/*
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* ------------------------------------------------------
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* Set a liberal script execution time limit
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* ------------------------------------------------------
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*/
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if (function_exists("set_time_limit") == TRUE AND @ini_get("safe_mode") == 0)
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{
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@set_time_limit(300);
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}
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/*
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* ------------------------------------------------------
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* Start the timer... tick tock tick tock...
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* ------------------------------------------------------
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*/
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$BM =& load_class('Benchmark', 'core');
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$BM->mark('total_execution_time_start');
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$BM->mark('loading_time:_base_classes_start');
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/*
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* ------------------------------------------------------
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* Instantiate the hooks class
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* ------------------------------------------------------
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*/
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$EXT =& load_class('Hooks', 'core');
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/*
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* ------------------------------------------------------
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* Is there a "pre_system" hook?
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* ------------------------------------------------------
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*/
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$EXT->_call_hook('pre_system');
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/*
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* ------------------------------------------------------
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* Instantiate the config class
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* ------------------------------------------------------
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*/
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$CFG =& load_class('Config', 'core');
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// Do we have any manually set config items in the index.php file?
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if (isset($assign_to_config))
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{
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$CFG->_assign_to_config($assign_to_config);
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}
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/*
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* ------------------------------------------------------
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* Instantiate the UTF-8 class
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* ------------------------------------------------------
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*
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* Note: Order here is rather important as the UTF-8
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* class needs to be used very early on, but it cannot
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* properly determine if UTf-8 can be supported until
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* after the Config class is instantiated.
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*
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*/
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$UNI =& load_class('Utf8', 'core');
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/*
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* ------------------------------------------------------
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* Instantiate the URI class
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* ------------------------------------------------------
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*/
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$URI =& load_class('URI', 'core');
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/*
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* ------------------------------------------------------
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* Instantiate the routing class and set the routing
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* ------------------------------------------------------
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*/
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$RTR =& load_class('Router', 'core');
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$RTR->_set_routing();
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// Set any routing overrides that may exist in the main index file
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if (isset($routing))
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{
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$RTR->_set_overrides($routing);
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}
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/*
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* ------------------------------------------------------
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* Instantiate the output class
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* ------------------------------------------------------
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*/
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$OUT =& load_class('Output', 'core');
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/*
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* ------------------------------------------------------
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* Is there a valid cache file? If so, we're done...
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* ------------------------------------------------------
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*/
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if ($EXT->_call_hook('cache_override') === FALSE)
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{
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if ($OUT->_display_cache($CFG, $URI) == TRUE)
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{
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exit;
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}
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}
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/*
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* ------------------------------------------------------
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* Load the Input class and sanitize globals
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* ------------------------------------------------------
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*/
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$IN =& load_class('Input', 'core');
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/*
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* ------------------------------------------------------
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* Load the Language class
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* ------------------------------------------------------
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*/
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$LANG =& load_class('Lang', 'core');
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/*
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* ------------------------------------------------------
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* Load the app controller and local controller
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* ------------------------------------------------------
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*
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*/
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// Load the base controller class
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require BASEPATH.'core/Controller'.EXT;
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function &get_instance()
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{
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return CI_Controller::get_instance();
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}
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if (file_exists(APPPATH.'core/'.$CFG->config['subclass_prefix'].'Controller'.EXT))
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{
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require APPPATH.'core/'.$CFG->config['subclass_prefix'].'Controller'.EXT;
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}
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// Load the local application controller
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// Note: The Router class automatically validates the controller path using the router->_validate_request().
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// If this include fails it means that the default controller in the Routes.php file is not resolving to something valid.
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if ( ! file_exists(APPPATH.'controllers/'.$RTR->fetch_directory().$RTR->fetch_class().EXT))
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{
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show_error('Unable to load your default controller. Please make sure the controller specified in your Routes.php file is valid.');
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}
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include(APPPATH.'controllers/'.$RTR->fetch_directory().$RTR->fetch_class().EXT);
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// Set a mark point for benchmarking
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$BM->mark('loading_time:_base_classes_end');
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/*
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* ------------------------------------------------------
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* Security check
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* ------------------------------------------------------
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*
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* None of the functions in the app controller or the
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* loader class can be called via the URI, nor can
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* controller functions that begin with an underscore
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*/
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$class = $RTR->fetch_class();
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$method = $RTR->fetch_method();
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if ( ! class_exists($class)
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OR strncmp($method, '_', 1) == 0
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OR in_array(strtolower($method), array_map('strtolower', get_class_methods('CI_Controller')))
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)
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{
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show_404("{$class}/{$method}");
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}
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/*
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* ------------------------------------------------------
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* Is there a "pre_controller" hook?
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* ------------------------------------------------------
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*/
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$EXT->_call_hook('pre_controller');
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/*
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* ------------------------------------------------------
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* Instantiate the requested controller
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* ------------------------------------------------------
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*/
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// Mark a start point so we can benchmark the controller
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$BM->mark('controller_execution_time_( '.$class.' / '.$method.' )_start');
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$CI = new $class();
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/*
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* ------------------------------------------------------
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* Is there a "post_controller_constructor" hook?
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* ------------------------------------------------------
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*/
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$EXT->_call_hook('post_controller_constructor');
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/*
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* ------------------------------------------------------
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* Call the requested method
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* ------------------------------------------------------
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*/
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// Is there a "remap" function? If so, we call it instead
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if (method_exists($CI, '_remap'))
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{
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$CI->_remap($method, array_slice($URI->rsegments, 2));
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}
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else
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{
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// is_callable() returns TRUE on some versions of PHP 5 for private and protected
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// methods, so we'll use this workaround for consistent behavior
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if ( ! in_array(strtolower($method), array_map('strtolower', get_class_methods($CI))))
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{
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// Check and see if we are using a 404 override and use it.
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if ( ! empty($RTR->routes['404_override']))
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{
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$x = explode('/', $RTR->routes['404_override']);
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$class = $x[0];
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$method = (isset($x[1]) ? $x[1] : 'index');
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if ( ! class_exists($class))
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{
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if ( ! file_exists(APPPATH.'controllers/'.$class.EXT))
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{
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show_404("{$class}/{$method}");
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}
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include_once(APPPATH.'controllers/'.$class.EXT);
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unset($CI);
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$CI = new $class();
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}
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}
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else
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{
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show_404("{$class}/{$method}");
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}
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}
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// Call the requested method.
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// Any URI segments present (besides the class/function) will be passed to the method for convenience
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call_user_func_array(array(&$CI, $method), array_slice($URI->rsegments, 2));
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}
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// Mark a benchmark end point
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$BM->mark('controller_execution_time_( '.$class.' / '.$method.' )_end');
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/*
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* ------------------------------------------------------
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* Is there a "post_controller" hook?
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* ------------------------------------------------------
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*/
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$EXT->_call_hook('post_controller');
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/*
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* ------------------------------------------------------
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* Send the final rendered output to the browser
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* ------------------------------------------------------
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*/
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if ($EXT->_call_hook('display_override') === FALSE)
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{
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$OUT->_display();
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}
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/*
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* ------------------------------------------------------
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* Is there a "post_system" hook?
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* ------------------------------------------------------
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*/
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$EXT->_call_hook('post_system');
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/*
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* ------------------------------------------------------
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* Close the DB connection if one exists
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* ------------------------------------------------------
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*/
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if (class_exists('CI_DB') AND isset($CI->db))
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{
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$CI->db->close();
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}
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/* End of file CodeIgniter.php */
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/* Location: ./system/core/CodeIgniter.php */
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