php - 使用 DateInterval 计算两个日期之间的月份而不在一年内换行

Question

我知道这个话题已经很累了，但显然还不够！

$temp_d1 = new DateTime(date('Y-m-d', $fromTime)); // 2012-01-01
$temp_d2 = new DateTime(date('Y-m-d', $endTime)); // 2013-02-01
$interval = $temp_d2->diff($temp_d1); 
$monthsAhead = $interval->format('%m'); // returns 1, but I am expecting 13

你如何计算两个日期之间的月数，而不是在 12 个月的范围内换行？

Answer 1

I was confusing exactly what:

$monthsAhead = $interval->format('%m');

does.

Obviously, format('%m') is just formatting the month component of the DateInterval object, not necessarily 'give me the interval as a number of months'.

In my case, I was looking for/to do this:

$monthsAhead = $interval->m + ($interval->y * 12);

http://www.php.net/manual/en/class.dateinterval.php

Hope this helps other fools in the future!