private static function RemoveUndefinedVars(){
            $oThis = self::CreateInstanceIfNotExists();
            $iOffset = 0;

            while(preg_match('/{\$(.*?)}/i', $oThis->sBuffer, $aMatches, PREG_OFFSET_CAPTURE, $iOffset)){
                $oThis->sBuffer = str_replace($aMatches[0][0], "false", $oThis->sBuffer);
                $iOffset = $aMatches[0][1]+strlen($aMatches[0][0]);
            }
        }