--- /dev/null
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * 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
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * 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/
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+* Determines if the current version of PHP is greater then the supplied value
+*
+* Since there are a few places where we conditionally test for PHP > 5
+* we'll set a static variable.
+*
+* @access public
+* @param string
+* @return bool TRUE if the current version is $version or higher
+*/
+ function is_php($version = '5.0.0')
+ {
+ static $_is_php;
+ $version = (string)$version;
+
+ if ( ! isset($_is_php[$version]))
+ {
+ $_is_php[$version] = (version_compare(PHP_VERSION, $version) < 0) ? FALSE : TRUE;
+ }
+
+ return $_is_php[$version];
+ }
+
+// ------------------------------------------------------------------------
+
+/**
+ * Tests for file writability
+ *
+ * is_writable() returns TRUE on Windows servers when you really can't write to
+ * the file, based on the read-only attribute. is_writable() is also unreliable
+ * on Unix servers if safe_mode is on.
+ *
+ * @access private
+ * @return void
+ */
+ function is_really_writable($file)
+ {
+ // If we're on a Unix server with safe_mode off we call is_writable
+ if (DIRECTORY_SEPARATOR == '/' AND @ini_get("safe_mode") == FALSE)
+ {
+ return is_writable($file);
+ }
+
+ // For windows servers and safe_mode "on" installations we'll actually
+ // write a file then read it. Bah...
+ if (is_dir($file))
+ {
+ $file = rtrim($file, '/').'/'.md5(mt_rand(1,100).mt_rand(1,100));
+
+ if (($fp = @fopen($file, FOPEN_WRITE_CREATE)) === FALSE)
+ {
+ return FALSE;
+ }
+
+ fclose($fp);
+ @chmod($file, DIR_WRITE_MODE);
+ @unlink($file);
+ return TRUE;
+ }
+ elseif ( ! is_file($file) OR ($fp = @fopen($file, FOPEN_WRITE_CREATE)) === FALSE)
+ {
+ return FALSE;
+ }
+
+ fclose($fp);
+ return TRUE;
+ }
+
+// ------------------------------------------------------------------------
+
+/**
+* Class registry
+*
+* This function acts as a singleton. If the requested class does not
+* exist it is instantiated and set to a static variable. If it has
+* previously been instantiated the variable is returned.
+*
+* @access public
+* @param string the class name being requested
+* @param string the directory where the class should be found
+* @param string the class name prefix
+* @return object
+*/
+ function &load_class($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 native system/libraries folder
+ // thenin the local application/libraries folder
+ foreach (array(BASEPATH, APPPATH) as $path)
+ {
+ if (file_exists($path.$directory.'/'.$class.EXT))
+ {
+ $name = $prefix.$class;
+
+ if (class_exists($name) === FALSE)
+ {
+ require($path.$directory.'/'.$class.EXT);
+ }
+
+ break;
+ }
+ }
+
+ // Is the request a class extension? If so we load it too
+ if (file_exists(APPPATH.$directory.'/'.config_item('subclass_prefix').$class.EXT))
+ {
+ $name = config_item('subclass_prefix').$class;
+
+ if (class_exists($name) === FALSE)
+ {
+ require(APPPATH.$directory.'/'.config_item('subclass_prefix').$class.EXT);
+ }
+ }
+
+ // Did we find the class?
+ if ($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: '.$class.EXT);
+ }
+
+ // Keep track of what we just loaded
+ is_loaded($class);
+
+ $_classes[$class] = new $name();
+ return $_classes[$class];
+ }
+
+// --------------------------------------------------------------------
+
+/**
+* Keeps track of which libraries have been loaded. This function is
+* called by the load_class() function above
+*
+* @access public
+* @return array
+*/
+ function is_loaded($class = '')
+ {
+ static $_is_loaded = array();
+
+ if ($class != '')
+ {
+ $_is_loaded[strtolower($class)] = $class;
+ }
+
+ return $_is_loaded;
+ }
+
+// ------------------------------------------------------------------------
+
+/**
+* Loads the main config.php file
+*
+* This function lets us grab the config file even if the Config class
+* hasn't been instantiated yet
+*
+* @access private
+* @return array
+*/
+ function &get_config($replace = array())
+ {
+ static $_config;
+
+ if (isset($_config))
+ {
+ return $_config[0];
+ }
+
+ // Is the config file in the environment folder?
+ if ( ! defined('ENVIRONMENT') OR ! file_exists($file_path = APPPATH.'config/'.ENVIRONMENT.'/config'.EXT))
+ {
+ $file_path = APPPATH.'config/config'.EXT;
+ }
+
+ // Fetch the config file
+ if ( ! file_exists($file_path))
+ {
+ exit('The configuration file does not exist.');
+ }
+
+ require($file_path);
+
+ // Does the $config array exist in the file?
+ if ( ! isset($config) OR ! is_array($config))
+ {
+ exit('Your config file does not appear to be formatted correctly.');
+ }
+
+ // Are any values being dynamically replaced?
+ if (count($replace) > 0)
+ {
+ foreach ($replace as $key => $val)
+ {
+ if (isset($config[$key]))
+ {
+ $config[$key] = $val;
+ }
+ }
+ }
+
+ return $_config[0] =& $config;
+ }
+
+// ------------------------------------------------------------------------
+
+/**
+* Returns the specified config item
+*
+* @access public
+* @return mixed
+*/
+ function config_item($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, $status_code = 500, $heading = 'An Error Was Encountered')
+ {
+ $_error =& load_class('Exceptions', 'core');
+ echo $_error->show_error($heading, $message, 'error_general', $status_code);
+ exit;
+ }
+
+// ------------------------------------------------------------------------
+
+/**
+* 404 Page Handler
+*
+* This function is similar to the show_error() function above
+* However, instead of the standard error template it displays
+* 404 errors.
+*
+* @access public
+* @return void
+*/
+ function show_404($page = '', $log_error = TRUE)
+ {
+ $_error =& load_class('Exceptions', 'core');
+ $_error->show_404($page, $log_error);
+ exit;
+ }
+
+// ------------------------------------------------------------------------
+
+/**
+* Error Logging Interface
+*
+* We use this as a simple mechanism to access the logging
+* class and send messages to be logged.
+*
+* @access public
+* @return void
+*/
+ function log_message($level = 'error', $message, $php_error = FALSE)
+ {
+ static $_log;
+
+ if (config_item('log_threshold') == 0)
+ {
+ return;
+ }
+
+ $_log =& load_class('Log');
+ $_log->write_log($level, $message, $php_error);
+ }
+
+// ------------------------------------------------------------------------
+
+/**
+ * Set HTTP Status Header
+ *
+ * @access public
+ * @param int the status code
+ * @param string
+ * @return void
+ */
+ function set_status_header($code = 200, $text = '')
+ {
+ $stati = array(
+ 200 => 'OK',
+ 201 => 'Created',
+ 202 => 'Accepted',
+ 203 => 'Non-Authoritative Information',
+ 204 => 'No Content',
+ 205 => 'Reset Content',
+ 206 => 'Partial Content',
+
+ 300 => 'Multiple Choices',
+ 301 => 'Moved Permanently',
+ 302 => 'Found',
+ 304 => 'Not Modified',
+ 305 => 'Use Proxy',
+ 307 => 'Temporary Redirect',
+
+ 400 => 'Bad Request',
+ 401 => 'Unauthorized',
+ 403 => 'Forbidden',
+ 404 => 'Not Found',
+ 405 => 'Method Not Allowed',
+ 406 => 'Not Acceptable',
+ 407 => 'Proxy Authentication Required',
+ 408 => 'Request Timeout',
+ 409 => 'Conflict',
+ 410 => 'Gone',
+ 411 => 'Length Required',
+ 412 => 'Precondition Failed',
+ 413 => 'Request Entity Too Large',
+ 414 => 'Request-URI Too Long',
+ 415 => 'Unsupported Media Type',
+ 416 => 'Requested Range Not Satisfiable',
+ 417 => 'Expectation Failed',
+
+ 500 => 'Internal Server Error',
+ 501 => 'Not Implemented',
+ 502 => 'Bad Gateway',
+ 503 => 'Service Unavailable',
+ 504 => 'Gateway Timeout',
+ 505 => 'HTTP Version Not Supported'
+ );
+
+ if ($code == '' OR ! is_numeric($code))
+ {
+ show_error('Status codes must be numeric', 500);
+ }
+
+ if (isset($stati[$code]) AND $text == '')
+ {
+ $text = $stati[$code];
+ }
+
+ if ($text == '')
+ {
+ show_error('No status text available. Please check your status code number or supply your own message text.', 500);
+ }
+
+ $server_protocol = (isset($_SERVER['SERVER_PROTOCOL'])) ? $_SERVER['SERVER_PROTOCOL'] : FALSE;
+
+ if (substr(php_sapi_name(), 0, 3) == 'cgi')
+ {
+ header("Status: {$code} {$text}", TRUE);
+ }
+ elseif ($server_protocol == 'HTTP/1.1' OR $server_protocol == 'HTTP/1.0')
+ {
+ header($server_protocol." {$code} {$text}", TRUE, $code);
+ }
+ else
+ {
+ header("HTTP/1.1 {$code} {$text}", TRUE, $code);
+ }
+ }
+
+// --------------------------------------------------------------------
+
+/**
+* Exception Handler
+*
+* This is the custom exception handler that is declaired at the top
+* of Codeigniter.php. The main reason we use this is to permit
+* PHP errors to be logged in our own log files since the user may
+* not have access to server logs. Since this function
+* effectively intercepts PHP errors, however, we also need
+* to display errors based on the current error_reporting level.
+* We do that with the use of a PHP error template.
+*
+* @access private
+* @return void
+*/
+ function _exception_handler($severity, $message, $filepath, $line)
+ {
+ // We don't bother with "strict" notices since they tend to fill up
+ // the log file with excess information that isn't normally very helpful.
+ // For example, if you are running PHP 5 and you use version 4 style
+ // class functions (without prefixes like "public", "private", etc.)
+ // you'll get notices telling you that these have been deprecated.
+ if ($severity == E_STRICT)
+ {
+ return;
+ }
+
+ $_error =& load_class('Exceptions', 'core');
+
+ // Should we display the error? We'll get the current error_reporting
+ // level and add its bits with the severity bits to find out.
+ if (($severity & error_reporting()) == $severity)
+ {
+ $_error->show_php_error($severity, $message, $filepath, $line);
+ }
+
+ // Should we log the error? No? We're done...
+ if (config_item('log_threshold') == 0)
+ {
+ return;
+ }
+
+ $_error->log_exception($severity, $message, $filepath, $line);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Remove Invisible Characters
+ *
+ * This prevents sandwiching null characters
+ * between ascii characters, like Java\0script.
+ *
+ * @access public
+ * @param string
+ * @return string
+ */
+ function remove_invisible_characters($str, $url_encoded = TRUE)
+ {
+ $non_displayables = array();
+
+ // every control character except newline (dec 10)
+ // carriage return (dec 13), and horizontal tab (dec 09)
+
+ if ($url_encoded)
+ {
+ $non_displayables[] = '/%0[0-8bcef]/'; // url encoded 00-08, 11, 12, 14, 15
+ $non_displayables[] = '/%1[0-9a-f]/'; // url encoded 16-31
+ }
+
+ $non_displayables[] = '/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]+/S'; // 00-08, 11, 12, 14-31, 127
+
+ do
+ {
+ $str = preg_replace($non_displayables, '', $str, -1, $count);
+ }
+ while ($count);
+
+ return $str;
+ }
+
+
+/* End of file Common.php */
+/* Location: ./system/core/Common.php */
\ No newline at end of file
projects / living-lab-site.git / blobdiff