+ private function var_replace($s){
+ $m = array();
+ /** regexp:
+ * \$ literal $
+ * (\[)? optional open square bracket
+ * ([a-zA-Z0-9-_]+\.?)+ var name, followed by optional
+ * dot, repeated at least 1 time
+ * (?(1)\]) if there was opened square bracket
+ * (subgrup 1), match close bracket
+ */
+ if (preg_match_all('/\$(\[)?([a-zA-Z0-9-_]+\.?)+(?(1)\])/', $s,$m)){
+
+ foreach($m[0] as $var){
+ $varn = str_replace(array("[","]"), array("",""), $var);
+ $val = $this->_get_var($varn, true);
+ if ($val!=KEY_NOT_EXISTS)
+ $s = str_replace($var, $val, $s);
+ }
+ }
+
+ return $s;
+ }