我正在创建队列管理系统
$sql = "SELECT COUNT(*) FROM QueueP1 WHERE STATUS = '1'";
$result = $conn->query($sql);
$row = mysqli_fetch_assoc($result);
echo "No ".implode($row)."<Br>";
您可以使用MySQL功能进行计算。
$sql = "SELECT (COUNT(1) + 1) AS 'next_number' FROM QueueP1 WHERE STATUS = '1'";
$result = $conn->query($sql);
$row = mysqli_fetch_assoc($result);
echo "No ".$row['next_number']."<br/>";
使用COUNT(1)使MySQL免于计数所有列并加快查询速度。