0) { $sql = "Update voteattend set tvalid=1 where aid = '$tnum'"; $result = $conn->query($sql); $sql = "select tvalid from voteattend where aid = '$tnum'"; $result = $conn->query($sql); $num = $result->num_rows; if($num > 0) { $_SESSION['num_show'] = $tnum." 號票登記成功!"; } else { $_SESSION['num_show'] = $tnum." 號票不存在,登記失敗!"; } } else { $_SESSION['num_show'] = $tnum." 號不是票,登記失敗!"; } header("Location:registertheticket.php"); ?>