将Days，Hours，Minutes和Seconds转换为整数

Question

我可以将int转换为天，小时，分钟和秒，但是反转它并转换回秒的计算是什么？

这是我第一次转换的内容：

<?php
$seconds = 12345;
$days = floor ($seconds / 60 / 60 / 24);
$hours = floor ($seconds / 60 / 60) % 24;
$minutes = floor ($seconds / 60) % 60;
$seconds = $seconds % 60;
?>

Answer 1

$total = ($days * 24 * 60 * 60) + ($hours * 60 * 60) + ($minutes * 60) + $seconds;

Answer 2

试试这个

$total = ($days * 24 * 60 * 60) + ($hours * 60 * 60) + ($minutes * 60) + $seconds;