How to calculate the difference between two timestamps in php

php method to calculate how many days the difference between two timestamps is: 1. Subtract the two timestamps to get the time difference; 2. Divide the time difference by the total number of seconds in a day "86400", and use floor( ) function, syntax "floor(time difference/86400)".

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

php calculates two timestamps How many days apart

Implementation idea:

• Subtract the two timestamps to get the time difference

• The time difference is divided by the total number of seconds in a day (24*60*60=86400)

Implementation code:

<?php
header("Content-type:text/html;charset=utf-8");
ini_set(&#39;date.timezone&#39;, &#39;Asia/Shanghai&#39;);
//2021年1月1日19点30分0秒
$time1="1609500600";
//2021年7月7日7点30分0秒
$time2="1625614200";
$diff_seconds = $time2 - $time1;
$diff_days = floor($diff_seconds/86400);
echo "两个时间戳相差： ".$diff_days." 天";
?>

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