Question

我有以下代码，想要计算我的平均时间使用date（）函数提交spot对象。

$query3 =$pdo->prepare("SELECT * FROM `ks`.`spots`  WHERE solved=:solved;");
$query3->bindParam(':solved', $not_solved, PDO::PARAM_INT);
$query3->execute();
$num_of_solved1 = $query3->rowCount();
$results = $query3->fetchAll( PDO::FETCH_ASSOC );

foreach( $results as $row ) {

    //$temp_created_at =        $row['created_at'];
    //$temp_updated_at =        $row['updated_at'];
    //$time += $row->temp_created_at - $row->temp_updated_at;
    $time += $row->created_at - $row->updated_at;



}
$average_time = $time / $num_of_solved1;

Answer 1

要使用时间进行数学计算，你使用unix时间戳，这基本上是1970年以来的秒数，是一个整数。

foreach( $results as $row ) {
    $created = strtotime($row->created_at);
    $updated = strtotime($row->updated_at);
    $time += $created - $updated;
}
// $time at this point is in seconds

Answer 2

您可以使用MySQL函数TIMESTAMPDIFF()进行日期时间减法：

SELECT 
    *,
    TIMESTAMPDIFF(SECOND, `created_at`, `updated_at`) AS `diff`
FROM
    `ks`.`spots` 
WHERE
    solved = :solved

然后在你的循环中，只需加上diff值：

foreach ($results as $row) {
    # ...
    $time += $row['diff'];
}

我如何计算平均创建时间和更新时间？

2 个答案: