public static function code39($barcode) { if (!is_object(self::$PRINT_OBJ)) { $print_class = CoreLocal::get('ReceiptDriver'); if ($print_class === '' || !class_exists($print_class)) { $print_class = 'ESCPOSPrintHandler'; } self::$PRINT_OBJ = new $print_class(); } return self::$PRINT_OBJ->BarcodeCODE39($barcode); }