$date = date("d-m-Y"); 
        $filename = "$date.txt"; 
        $data = "Date: $date, LastName: $Lastname, Phone: $phone, Payment: $payment, Room No: $roomno, Lock No: $lockno\n"; 
        $file = fopen($filename, "a"); 
        fwrite($file, $data); 
        fclose($file);