2次，相同格式不计算

Question

$dbtime = $row["dateupload"];
print_r($dbtime); //- DATE FORMAT: 2020-02-21 22:24:00
echo("<br>");
$servertime = date('Y-m-d h:i:s', time());
print_r($servertime); //- DATE FORMAT: 2020-02-21 22:24:00

$totaltime = $dbtime - $servertime;

$etime = $totaltime; //-  A non well formed numeric value encountered in
if ($etime < 1)
{
return '0 seconds';
}

尝试使用字符串格式，但这是显示正确的结果，现在在print_r，缺少什么?

Answer 1

use date_diff():

https://www.php.net/manual/en/datetime.diff.php

<?php
$origin = date_create('2009-10-11');
$target = date_create('2009-10-13');
$interval = date_diff($origin, $target);
echo $interval->format('%R%a days');

或使用$object_of_DateTime->diff()

$origin = new DateTime('2009-10-11');
$target = new DateTime('2009-10-13');
$interval = $origin->diff($target);
echo $interval->format('%R%a days');

否则使用Unix时间戳格式，如1613953162

所以你可以使用

$diffrent_in_second = 1613953162-1613953151 // 11 seconds