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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 - 2010, EllisLab, Inc.
* @license http://codeigniter.com/user_guide/license.html
* @link http://codeigniter.com
* @since Version 1.0
* @filesource
*/
// ------------------------------------------------------------------------
/**
* CodeIgniter Security Helpers
*
* @package CodeIgniter
* @subpackage Helpers
* @category Helpers
* @author ExpressionEngine Dev Team
* @link http://codeigniter.com/user_guide/helpers/security_helper.html
*/
// ------------------------------------------------------------------------
/**
* XSS Filtering
*
* @access public
* @param string
* @param bool whether or not the content is an image file
* @return string
*/
if ( ! function_exists('xss_clean'))
{
function xss_clean($str, $is_image = FALSE)
{
$CI =& get_instance();
return $CI->input->xss_clean($str, $is_image);
}
}
// --------------------------------------------------------------------
/**
* Hash encode a string
*
* This is simply an alias for do_hash()
* dohash() is now deprecated
*/
if ( ! function_exists('dohash'))
{
function dohash($str, $type = 'sha1')
{
return $this->do_hash($str, $type);
}
}
// --------------------------------------------------------------------
/**
* Hash encode a string
*
* @access public
* @param string
* @return string
*/
if ( ! function_exists('do_hash'))
{
function do_hash($str, $type = 'sha1')
{
if ($type == 'sha1')
{
if ( ! function_exists('sha1'))
{
if ( ! function_exists('mhash'))
{
require_once(BASEPATH.'libraries/Sha1'.EXT);
$SH = new CI_SHA;
return $SH->generate($str);
}
else
{
return bin2hex(mhash(MHASH_SHA1, $str));
}
}
else
{
return sha1($str);
}
}
else
{
return md5($str);
}
}
}
// ------------------------------------------------------------------------
/**
* Strip Image Tags
*
* @access public
* @param string
* @return string
*/
if ( ! function_exists('strip_image_tags'))
{
function strip_image_tags($str)
{
$str = preg_replace("#<img\s+.*?src\s*=\s*[\"'](.+?)[\"'].*?\>#", "\\1", $str);
$str = preg_replace("#<img\s+.*?src\s*=\s*(.+?).*?\>#", "\\1", $str);
return $str;
}
}
// ------------------------------------------------------------------------
/**
* Convert PHP tags to entities
*
* @access public
* @param string
* @return string
*/
if ( ! function_exists('encode_php_tags'))
{
function encode_php_tags($str)
{
return str_replace(array('<?php', '<?PHP', '<?', '?>'), array('<?php', '<?PHP', '<?', '?>'), $str);
}
}
/* End of file security_helper.php */
/* Location: ./system/helpers/security_helper.php */
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