How to calculate the difference between time and how many days in php

php method to calculate the difference in days between time subtraction: 1. Use the "strtotime("time")" statement to convert the two times into timestamps; 2. Subtract the two timestamps to get the time difference ;3. Divide the time difference by the total number of seconds in a day and use floor() to round. The syntax is "floor(time difference/86400)".

The operating environment of this tutorial: windows7 system, PHP version 8.1, DELL G3 computer

How to calculate time with php Subtract the difference in days

Implementation idea:

• Use strtotime() function to convert two times into timestamp

• Subtract the two timestamps to get the time difference

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

• Use floor() to round

Implementation code:

<?php
header("Content-type:text/html;charset=utf-8");
//2022年1月1日 19点30分0秒
$time1=strtotime("2022-1-1");
//2022年7月7日 7点30分0秒
$time2=strtotime("2022-7-7");

$diff_seconds = $time2 - $time1;
$diff_days = floor($diff_seconds/86400);
echo "两个时间相差： ".$diff_days." 天";
?>

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