CodeIgniter.php

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<?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, 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',    '1.7.0');

/*
 * ------------------------------------------------------
 *  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');
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 (floor(phpversion()) < 5)
{
        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 */