Second pass at adding key files

site/stackreach/libs/plugins/shared.escape_special_chars.php

@@ -0,0 +1,29 @@
+<?php
+/**
+ * Smarty shared plugin
+ *
+ * @package Smarty
+ * @subpackage PluginsShared
+ */
+
+/**
+ * escape_special_chars common function
+ *
+ * Function: smarty_function_escape_special_chars<br>
+ * Purpose:  used by other smarty functions to escape
+ *           special chars except for already escaped ones
+ * @author   Monte Ohrt <monte at ohrt dot com>
+ * @param string
+ * @return string
+ */
+function smarty_function_escape_special_chars($string)
+{
+    if(!is_array($string)) {
+        $string = preg_replace('!&(#?\w+);!', '%%%SMARTY_START%%%\\1%%%SMARTY_END%%%', $string);
+        $string = htmlspecialchars($string);
+        $string = str_replace(array('%%%SMARTY_START%%%','%%%SMARTY_END%%%'), array('&',';'), $string);
+    }
+    return $string;
+}
+
+?>