<?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) 2006, EllisLab, Inc. * @license http://codeigniter.com/user_guide/license.html * @link http://codeigniter.com * @since Version 1.0 * @filesource */ // ------------------------------------------------------------------------ /** * Common Functions * * Loads the base classes and executes the request. * * @package CodeIgniter * @subpackage codeigniter * @category Common Functions * @author ExpressionEngine Dev Team * @link http://codeigniter.com/user_guide/ */ // ------------------------------------------------------------------------ /** * Tests for file writability * * is_writable() returns TRUE on Windows servers * when you really can't write to the file * as the OS reports to PHP as FALSE only if the * read-only attribute is marked. Ugh? * * @access private * @return void */ function is_really_writable($file) { if (is_dir($file)) { $file = rtrim($file, '/').'/'.md5(rand(1,100)); if (($fp = @fopen($file, FOPEN_WRITE_CREATE)) === FALSE) { return FALSE; } fclose($fp); @chmod($file, DIR_WRITE_MODE); @unlink($file); return TRUE; } elseif (($fp = @fopen($file, FOPEN_WRITE_CREATE)) === FALSE) { return FALSE; } fclose($fp); return TRUE; } // ------------------------------------------------------------------------ /** * 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. * * @access public * @param string the class name being requested * @param bool optional flag that lets classes get loaded but not instantiated * @return object */ function &load_class($class, $instantiate = TRUE) { static $objects = array(); // Does the class exist? If so, we're done... if (isset($objects[$class])) { return $objects[$class]; } // If the requested class does not exist in the application/libraries // folder we'll load the native class from the system/libraries folder. if (file_exists(APPPATH.'libraries/'.config_item('subclass_prefix').$class.EXT)) { require(BASEPATH.'libraries/'.$class.EXT); require(APPPATH.'libraries/'.config_item('subclass_prefix').$class.EXT); $is_subclass = TRUE; } else { if (file_exists(APPPATH.'libraries/'.$class.EXT)) { require(APPPATH.'libraries/'.$class.EXT); $is_subclass = FALSE; } else { require(BASEPATH.'libraries/'.$class.EXT); $is_subclass = FALSE; } } if ($instantiate == FALSE) { $objects[$class] = TRUE; return $objects[$class]; } if ($is_subclass == TRUE) { $name = config_item('subclass_prefix').$class; $objects[$class] =& new $name(); return $objects[$class]; } $name = ($class != 'Controller') ? 'CI_'.$class : $class; $objects[$class] =& new $name(); return $objects[$class]; } /** * Loads the main config.php file * * @access private * @return array */ function &get_config() { static $main_conf; if ( ! isset($main_conf)) { if ( ! file_exists(APPPATH.'config/config'.EXT)) { exit('The configuration file config'.EXT.' does not exist.'); } require(APPPATH.'config/config'.EXT); if ( ! isset($config) OR ! is_array($config)) { exit('Your config file does not appear to be formatted correctly.'); } $main_conf[0] =& $config; } return $main_conf[0]; } /** * Gets a config item * * @access public * @return mixed */ function config_item($item) { static $config_item = array(); if ( ! isset($config_item[$item])) { $config =& get_config(); if ( ! isset($config[$item])) { return FALSE; } $config_item[$item] = $config[$item]; } return $config_item[$item]; } /** * Error Handler * * This function lets us invoke the exception class and * display errors using the standard error template located * in application/errors/errors.php * This function will send the error page directly to the * browser and exit. * * @access public * @return void */ function show_error($message) { $error =& load_class('Exceptions'); echo $error->show_error('An Error Was Encountered', $message); exit; } /** * 404 Page Handler * * This function is similar to the show_error() function above * However, instead of the standard error template it displays * 404 errors. * * @access public * @return void */ function show_404($page = '') { $error =& load_class('Exceptions'); $error->show_404($page); exit; } /** * Error Logging Interface * * We use this as a simple mechanism to access the logging * class and send messages to be logged. * * @access public * @return void */ function log_message($level = 'error', $message, $php_error = FALSE) { static $LOG; $config =& get_config(); if ($config['log_threshold'] == 0) { return; } $LOG =& load_class('Log'); $LOG->write_log($level, $message, $php_error); } /** * Exception Handler * * This is the custom exception handler that is declaired at the top * of Codeigniter.php. The main reason we use this is permit * PHP errors to be logged in our own log files since we may * not have access to server logs. Since this function * effectively intercepts PHP errors, however, we also need * to display errors based on the current error_reporting level. * We do that with the use of a PHP error template. * * @access private * @return void */ function _exception_handler($severity, $message, $filepath, $line) { // We don't bother with "strict" notices since they will fill up // the log file with information that isn't normally very // helpful. For example, if you are running PHP 5 and you // use version 4 style class functions (without prefixes // like "public", "private", etc.) you'll get notices telling // you that these have been deprecated. if ($severity == E_STRICT) { return; } $error =& load_class('Exceptions'); // Should we display the error? // We'll get the current error_reporting level and add its bits // with the severity bits to find out. if (($severity & error_reporting()) == $severity) { $error->show_php_error($severity, $message, $filepath, $line); } // Should we log the error? No? We're done... $config =& get_config(); if ($config['log_threshold'] == 0) { return; } $error->log_exception($severity, $message, $filepath, $line); } /* End of file Common.php */ /* Location: ./system/codeigniter/Common.php */