奇怪的PHP 5.3问题与日期差异计算差异天数 [英] Strange PHP 5.3 issue with date diff calculating difference in days

问题描述

使用PHP 5.3的日期差异函数计算两个日期之间的差异，我遇到一个相当奇怪的问题。以下是我的代码：

I am experiencing a rather strange problem using PHP 5.3's date diff function to calculate the difference in days between two dates. Below is my code:

$currentDate = new DateTime(); // (today's date is 2012-1-27)
$startDate = new DateTime('2012-04-01');

$diff = $startDate->diff($currentDate);

$daysBefore = $diff->d;

echo $daysBefore; 

上面的代码显示4作为$ daysBefore变量的值。

The above code displays 4 as the value of the $daysBefore variable.

为什么PHP在2012年1月27日至2012年4月1日之间显示4天的差异，那么这些日期之间显然还有更多的日子。

Why is PHP displaying a difference of 4 days between the dates 27th Jan 2012 and 1st April 2012, when clearly there are many more days between these dates.

我做错了什么？

推荐答案

DateInterval :: $ d 是间隔时间的一部分，不差异的总天数。为此，您需要 DateInterval :: $ days ，所以：

DateInterval::$d is the days part of the interval, not the total number of days of the difference. For that, you want DateInterval::$days, so:

$daysBefore = $diff->days;

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