Question

if (mysqli_num_rows($result) > 0) {
function duration() {
    if ($row["duration"] == 0) {
        return "Expired";
    } else if ($row["duration"] > -1) {
        return $row["duration"];
    } else {
        return "Unknown Error";
    }
};

    echo '<table>';
    while($row = mysqli_fetch_assoc($result)) {
        timeLeft();
        echo '<tr><td>' . " Left from event: " .  duration() . '</td></tr>';
    }
    echo '</table>';
} else {
    echo "0 results";
};

mysqli_close($conn);

我正在尝试用“Expired”替换0，但是使用此代码它将替换所有表。

而不是：

Left from event: Expired
Left from event: 3

我明白了：

Left from event: Expired
Left from event: Expired

Answer 1

您需要将$row传递给函数：

function duration(array $row) {
    if ($row["duration"] == 0) {
        return "Expired";
    } else if ($row["duration"] > -1) {
        return $row["duration"];
    } else {
        return "Unknown Error";
    }
}

并使用duration($row)

进行调用

作为一个完整的例子，

$rows = [
    [ 'duration' => 0 ],
    [ 'duration' => 2 ],
    [ 'duration' => 3 ],
    [ 'duration' => 4 ]
];

function duration(array $row) {
    if ($row["duration"] == 0) {
        return "Expired";
    } else if ($row["duration"] > -1) {
        return $row["duration"];
    }
}

foreach ($rows as $row) {
    $duration = duration($row);
    echo "Left from event: {$duration}\n";
}

产生

Left from event: Expired
Left from event: 2
Left from event: 3
Left from event: 4

如果带有数据库值的语句，请为每行设置不同的值

1 个答案: