replace ereg how is deprecated in php 5.3 and removed in php 6

interface/lib/classes/tpl.inc.php

@@ -1095,7 +1095,7 @@ if (!defined('vlibTemplateClassLoaded')) {
 
             switch (strtolower($this->OPTIONS['UNKNOWNS'])) {
                 case 'comment':
-                    $comment = addcslashes('<!-- unknown variable '.ereg_replace('<!--|-->', '', $wholetag).'//-->', '"');
+                    $comment = addcslashes('<!-- unknown variable '.preg_replace('/<!--|-->/', '', $wholetag).'//-->', '"');
                     $retstr .= ' else { print("'.$comment.'"); $this->_setUnknown("'.$varname.'"); }';
                     return $retstr;
 

interface/lib/classes/tpl_cache.inc.php

@@ -82,7 +82,7 @@ class tplc extends tpl {
      * @return boolean
      */
     function setCacheExtension($str = null) {
-        if ($str == null || !ereg('^[a-z0-9]+$', strtolower($str))) return false;
+        if ($str == null || !preg_match('/^[a-z0-9]+$/', strtolower($str))) return false;
         $this->OPTIONS['CACHE_EXTENSION'] = strtolower($str);
         return true;
     }