Moved to PHP folder

php/system/helpers/security_helper.php

@@ -0,0 +1,137 @@
+<?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('&lt;?', '?&gt;'), $str);
+	}
+}