function book_a_seat() { $result = -100; if (isset($_REQUEST['event_id']) && isset($_REQUEST['seat_id']) && isset($_REQUEST['booking_id'])) { $event_id = $_REQUEST['event_id']; $seat_id = $_REQUEST['seat_id']; $booking_id = $_REQUEST['booking_id']; seating_chart::release_a_seat($booking_id); $check = seating_chart::check_seat_available($event_id, $seat_id); if ($check == 0) { $booking_id = seating_chart::book_a_seat($event_id, $seat_id); $result = $booking_id; } else { $result = -1; } } echo $result; }