public static function check_if_not_overlapping_or_die(Resource_Booking_DB $rb_db, $resource_id, $booking_id, $start, $end) { $bookings = $rb_db->check_if_overlapping($resource_id, $booking_id, $start, $end); if (count($bookings) > 0) { // And die wp_send_json_error(array("message" => "Booking overlapping")); } }