Initial Import
diff --git a/system/helpers/security_helper.php b/system/helpers/security_helper.php
new file mode 100644
index 0000000..918e4ae
--- /dev/null
+++ b/system/helpers/security_helper.php
@@ -0,0 +1,112 @@
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * Code Igniter
+ *
+ * An open source application development framework for PHP 4.3.2 or newer
+ *
+ * @package CodeIgniter
+ * @author Rick Ellis
+ * @copyright Copyright (c) 2006, pMachine, Inc.
+ * @license http://www.codeignitor.com/user_guide/license.html
+ * @link http://www.codeigniter.com
+ * @since Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * Code Igniter Security Helpers
+ *
+ * @package CodeIgniter
+ * @subpackage Helpers
+ * @category Helpers
+ * @author Rick Ellis
+ * @link http://www.codeigniter.com/user_guide/helpers/security_helper.html
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * XSS Filtering
+ *
+ * @access public
+ * @parm string
+ * @parm string the character set of your data
+ * @return string
+ */
+function xss_clean($str, $charset = 'ISO-8859-1')
+{
+ $obj =& get_instance();
+ return $obj->input->xss_clean($str, $charset);
+}
+
+// --------------------------------------------------------------------
+
+/**
+ * Hash encode a string
+ *
+ * @access public
+ * @param string
+ * @return string
+ */
+function hash($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($str);
+ }
+}
+
+// ------------------------------------------------------------------------
+
+/**
+ * Strip Image Tags
+ *
+ * @access public
+ * @parm string
+ * @return string
+ */
+function strip_image_tags($str)
+{
+ $str = preg_replace("#<img\s+.*?src\s*=\s*[\"'](.+?)[\"'].*?\>#", "\\1", $str);
+ $str = preg_replace("#<img\s+.*?src\s*=\s*(.+?).*?\>#", "\\1", $str);
+
+ return $str;
+}
+
+// ------------------------------------------------------------------------
+
+/**
+ * Convert PHP tags to entities
+ *
+ * @access public
+ * @parm string
+ * @return string
+ */
+function encode_php_tags($str)
+{
+ return str_replace(array('<?php', '<?PHP', '<?', '?>'), array('<?php', '<?PHP', '<?', '?>'), $str);
+}
+
+?>
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