| <?php |
| /** |
| * CodeIgniter |
| * |
| * An open source application development framework for PHP |
| * |
| * This content is released under the MIT License (MIT) |
| * |
| * Copyright (c) 2014 - 2018, British Columbia Institute of Technology |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| * |
| * @package CodeIgniter |
| * @author EllisLab Dev Team |
| * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/) |
| * @copyright Copyright (c) 2014 - 2018, British Columbia Institute of Technology (http://bcit.ca/) |
| * @license http://opensource.org/licenses/MIT MIT License |
| * @link https://codeigniter.com |
| * @since Version 1.0.0 |
| * @filesource |
| */ |
| defined('BASEPATH') OR exit('No direct script access allowed'); |
| |
| /** |
| * CodeIgniter Security Helpers |
| * |
| * @package CodeIgniter |
| * @subpackage Helpers |
| * @category Helpers |
| * @author EllisLab Dev Team |
| * @link https://codeigniter.com/user_guide/helpers/security_helper.html |
| */ |
| |
| // ------------------------------------------------------------------------ |
| |
| if ( ! function_exists('xss_clean')) |
| { |
| /** |
| * XSS Filtering |
| * |
| * @param string |
| * @param bool whether or not the content is an image file |
| * @return string |
| */ |
| function xss_clean($str, $is_image = FALSE) |
| { |
| return get_instance()->security->xss_clean($str, $is_image); |
| } |
| } |
| |
| // ------------------------------------------------------------------------ |
| |
| if ( ! function_exists('sanitize_filename')) |
| { |
| /** |
| * Sanitize Filename |
| * |
| * @param string |
| * @return string |
| */ |
| function sanitize_filename($filename) |
| { |
| return get_instance()->security->sanitize_filename($filename); |
| } |
| } |
| |
| // -------------------------------------------------------------------- |
| |
| if ( ! function_exists('do_hash')) |
| { |
| /** |
| * Hash encode a string |
| * |
| * @todo Remove in version 3.1+. |
| * @deprecated 3.0.0 Use PHP's native hash() instead. |
| * @param string $str |
| * @param string $type = 'sha1' |
| * @return string |
| */ |
| function do_hash($str, $type = 'sha1') |
| { |
| if ( ! in_array(strtolower($type), hash_algos())) |
| { |
| $type = 'md5'; |
| } |
| |
| return hash($type, $str); |
| } |
| } |
| |
| // ------------------------------------------------------------------------ |
| |
| if ( ! function_exists('strip_image_tags')) |
| { |
| /** |
| * Strip Image Tags |
| * |
| * @param string |
| * @return string |
| */ |
| function strip_image_tags($str) |
| { |
| return get_instance()->security->strip_image_tags($str); |
| } |
| } |
| |
| // ------------------------------------------------------------------------ |
| |
| if ( ! function_exists('encode_php_tags')) |
| { |
| /** |
| * Convert PHP tags to entities |
| * |
| * @param string |
| * @return string |
| */ |
| function encode_php_tags($str) |
| { |
| return str_replace(array('<?', '?>'), array('<?', '?>'), $str); |
| } |
| } |