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/trunksystemhelpers
 
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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 - 2009, 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
 *
 * @access    public
 * @param    string
 * @return    string
 */
if ( ! function_exists('dohash'))
{
    function dohash($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('&lt;?php', '&lt;?PHP', '&lt;?', '?&gt;'), $str);
    }
}


/* End of file security_helper.php */
/* Location: ./system/helpers/security_helper.php */
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