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<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
* An open source application development framework for PHP 5.2.4 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 - 2012, 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
*/
/**
* Common Functions
*
* Loads the base classes and executes the request.
*
* @package CodeIgniter
* @subpackage CodeIgniter
* @category Common Functions
* @author EllisLab Dev Team
* @link http://codeigniter.com/user_guide/
*/
// ------------------------------------------------------------------------
if ( ! function_exists('is_php'))
{
/**
* 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 > 5.3
* we'll set a static variable.
*
* @param string
* @return bool TRUE if the current version is $version or higher
*/
function is_php($version = '5.3.0')
{
static $_is_php;
$version = (string) $version;
if ( ! isset($_is_php[$version]))
{
$_is_php[$version] = (version_compare(PHP_VERSION, $version) >= 0);
}
return $_is_php[$version];
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('is_really_writable'))
{
/**
* 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.
*
* @param string
* @return void
*/
function is_really_writable($file)
{
// If we're on a Unix server with safe_mode off we call is_writable
if (DIRECTORY_SEPARATOR === '/' && (bool) @ini_get('safe_mode') === FALSE)
{
return is_writable($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($fp);
return TRUE;
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('load_class'))
{
/**
* Load class
*
* This function returns classes loaded in the core CodeIgniter object.
* DEPRECATED - get object from CodeIgniter::instance() directly
* Core classes are loaded internally, and all others should call CI_Loader.
*
* @param string the class name being requested
* @param string the directory where the class should be found
* @param string the class name prefix
* @return object
*/
function &load_class($class, $directory = 'libraries', $prefix = 'CI_')
{
// Get instance, lowercase class, and check
$CI = CodeIgniter::instance();
$class = strtolower($class);
if (isset($CI->$class))
{
// Return loaded class
return $CI->$class;
}
// Failed - return NULL
$null = NULL;
return $null;
}
}
// --------------------------------------------------------------------
if ( ! function_exists('is_loaded'))
{
/**
* Checks if a class is loaded
*
* DEPRECATED - check object with CodeIgniter::instance() directly
*
* @param string
* @return array
*/
function &is_loaded($class = '')
{
// Get instance, lowercase class, and check
$CI = CodeIgniter::instance();
$class = strtolower($class);
return isset($CI->$class);
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('get_config'))
{
/**
* Gets the main config.php file
*
* DEPRECATED - check with CodeIgniter::instance()->config directly, as
* Config is loaded before every class except Benchmark
*
* @param array
* @return array
*/
function &get_config($replace = array())
{
// Get instance and check for config
$CI = CodeIgniter::instance();
if ( ! isset($CI->config->config))
{
exit('The configuration file has not been loaded.');
}
// Get config array
$config = $CI->config->config;
// Are any values being dynamically replaced?
if (count($replace) > 0)
{
foreach ($replace as $key => $val)
{
if (isset($config[$key]))
{
$config[$key] = $val;
}
}
}
return $config;
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('config_item'))
{
/**
* Returns the specified config item
*
* @param string
* @return mixed
*/
function config_item($item)
{
// Get instance and check for config
$CI = CodeIgniter::instance();
if ( ! isset($CI->config))
{
return FALSE;
}
// Return config item
return $CI->config->item($item);
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('get_mimes'))
{
/**
* Returns the MIME types array from config/mimes.php
*
* @return array
*/
function &get_mimes()
{
$CI = CodeIgniter::instance();
return $CI->config->get('mimes.php');
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('show_error'))
{
/**
* Error Handler
*
* This function lets us invoke the exception class and
* display errors using the standard error template located
* in application/errors/errors.php
* This function will send the error page directly to the
* browser and exit.
*
* @param string
* @param int
* @param string
* @return void
*/
function show_error($message, $status_code = 500, $heading = 'An Error Was Encountered')
{
// Get instance, load Exceptions and call show_error
$CI = CodeIgniter::instance();
$CI->load_core_class('Exceptions');
$CI->exceptions->show_error($heading, $message, 'error_general', $status_code);
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('show_404'))
{
/**
* 404 Page Handler
*
* This function is similar to the show_error() function above
* However, instead of the standard error template it displays
* 404 errors.
*
* @param string
* @param bool
* @return void
*/
function show_404($page = '', $log_error = TRUE)
{
// Get instance, load Exceptions and call show_404
$CI = CodeIgniter::instance();
$CI->load_core_class('Exceptions');
$CI->exceptions->show_404($page, $log_error);
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('log_message'))
{
/**
* Error Logging Interface
*
* We use this as a simple mechanism to access the logging
* class and send messages to be logged.
*
* @param string
* @param string
* @param bool
* @return void
*/
function log_message($level = 'error', $message, $php_error = FALSE)
{
// Get instance and call log_message
$CI = CodeIgniter::instance();
$CI->log_message($level, $message, $php_error);
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('set_status_header'))
{
/**
* Set HTTP Status Header
*
* @param int the status code
* @param string
* @return void
*/
function set_status_header($code = 200, $text = '')
{
$stati = array(
200 => 'OK',
201 => 'Created',
202 => 'Accepted',
203 => 'Non-Authoritative Information',
204 => 'No Content',
205 => 'Reset Content',
206 => 'Partial Content',
300 => 'Multiple Choices',
301 => 'Moved Permanently',
302 => 'Found',
303 => 'See Other',
304 => 'Not Modified',
305 => 'Use Proxy',
307 => 'Temporary Redirect',
400 => 'Bad Request',
401 => 'Unauthorized',
403 => 'Forbidden',
404 => 'Not Found',
405 => 'Method Not Allowed',
406 => 'Not Acceptable',
407 => 'Proxy Authentication Required',
408 => 'Request Timeout',
409 => 'Conflict',
410 => 'Gone',
411 => 'Length Required',
412 => 'Precondition Failed',
413 => 'Request Entity Too Large',
414 => 'Request-URI Too Long',
415 => 'Unsupported Media Type',
416 => 'Requested Range Not Satisfiable',
417 => 'Expectation Failed',
422 => 'Unprocessable Entity',
500 => 'Internal Server Error',
501 => 'Not Implemented',
502 => 'Bad Gateway',
503 => 'Service Unavailable',
504 => 'Gateway Timeout',
505 => 'HTTP Version Not Supported'
);
if (empty($code) OR ! is_numeric($code))
{
show_error('Status codes must be numeric', 500);
}
is_int($code) OR $code = (int) $code;
if (empty($text))
{
if (isset($stati[$code]))
{
$text = $stati[$code];
}
else
{
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']) ? $_SERVER['SERVER_PROTOCOL'] : FALSE;
if (strpos(php_sapi_name(), 'cgi') === 0)
{
header('Status: '.$code.' '.$text, TRUE);
}
elseif ($server_protocol === 'HTTP/1.0')
{
header('HTTP/1.0 '.$code.' '.$text, TRUE, $code);
}
else
{
header('HTTP/1.1 '.$code.' '.$text, TRUE, $code);
}
}
}
// --------------------------------------------------------------------
if ( ! function_exists('remove_invisible_characters'))
{
/**
* Remove Invisible Characters
*
* This prevents sandwiching null characters
* between ascii characters, like Java\0script.
*
* @param string
* @param bool
* @return string
*/
function remove_invisible_characters($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 $str;
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('html_escape'))
{
/**
* Returns HTML escaped variable
*
* @param mixed
* @return mixed
*/
function html_escape($var)
{
return is_array($var)
? array_map('html_escape', $var)
: htmlspecialchars($var, ENT_QUOTES, config_item('charset'));
}
}
// ------------------------------------------------------------------------
if ( ! function_exists('_stringify_attributes'))
{
/**
* Stringify attributes for use in HTML tags.
*
* Helper function used to convert a string, array, or object
* of attributes to a string.
*
* @param mixed string, array, object
* @param bool
* @return string
*/
function _stringify_attributes($attributes, $js = FALSE)
{
$atts = NULL;
if (empty($attributes))
{
return $atts;
}
if (is_string($attributes))
{
return ' '.$attributes;
}
$attributes = (array) $attributes;
foreach ($attributes as $key => $val)
{
$atts .= ($js) ? $key.'='.$val.',' : ' '.$key.'="'.$val.'"';
}
return rtrim($atts, ',');
}
}
/* End of file Common.php */
/* Location: ./system/core/Common.php */
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