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2005 Aurelien 1 
<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
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/**
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 * CodeIgniter
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 *
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 * An open source application development framework for PHP 4.3.2 or newer
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 *
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 * @package		CodeIgniter
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 * @author		ExpressionEngine Dev Team
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 * @copyright	Copyright (c) 2008, EllisLab, Inc.
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 * @license		http://codeigniter.com/user_guide/license.html
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 * @link		http://codeigniter.com
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 * @since		Version 1.0
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 * @filesource
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 */
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// ------------------------------------------------------------------------
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/**
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 * CodeIgniter Security Helpers
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 *
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 * @package		CodeIgniter
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 * @subpackage	Helpers
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 * @category	Helpers
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 * @author		ExpressionEngine Dev Team
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 * @link		http://codeigniter.com/user_guide/helpers/security_helper.html
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 */
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// ------------------------------------------------------------------------
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/**
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 * XSS Filtering
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 *
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 * @access	public
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 * @param	string
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 * @param	string	the character set of your data
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 * @return	string
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 */
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if ( ! function_exists('xss_clean'))
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{
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	function xss_clean($str, $charset = 'ISO-8859-1')
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	{
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		$CI =& get_instance();
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		return $CI->input->xss_clean($str, $charset);
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	}
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}
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// --------------------------------------------------------------------
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/**
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 * Hash encode a string
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 *
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 * @access	public
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 * @param	string
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 * @return	string
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 */
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if ( ! function_exists('dohash'))
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{
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	function dohash($str, $type = 'sha1')
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	{
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		if ($type == 'sha1')
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		{
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			if ( ! function_exists('sha1'))
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			{
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				if ( ! function_exists('mhash'))
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				{
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					require_once(BASEPATH.'libraries/Sha1'.EXT);
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					$SH = new CI_SHA;
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					return $SH->generate($str);
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				}
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				else
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				{
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					return bin2hex(mhash(MHASH_SHA1, $str));
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				}
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			}
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			else
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			{
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				return sha1($str);
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			}
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		}
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		else
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		{
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			return md5($str);
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		}
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	}
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}
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// ------------------------------------------------------------------------
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/**
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 * Strip Image Tags
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 *
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 * @access	public
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 * @param	string
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 * @return	string
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 */
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if ( ! function_exists('strip_image_tags'))
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{
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	function strip_image_tags($str)
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	{
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		$str = preg_replace("#<img\s+.*?src\s*=\s*[\"'](.+?)[\"'].*?\>#", "\\1", $str);
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		$str = preg_replace("#<img\s+.*?src\s*=\s*(.+?).*?\>#", "\\1", $str);
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		return $str;
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	}
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}
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// ------------------------------------------------------------------------
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/**
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 * Convert PHP tags to entities
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 *
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 * @access	public
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 * @param	string
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 * @return	string
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 */
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if ( ! function_exists('encode_php_tags'))
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{
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	function encode_php_tags($str)
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	{
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		return str_replace(array('<?php', '<?PHP', '<?', '?>'),  array('&lt;?php', '&lt;?PHP', '&lt;?', '?&gt;'), $str);
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	}
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}
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/* End of file security_helper.php */
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/* Location: ./system/helpers/security_helper.php */