php datetime-> diff计算错误的小时数（太多3） [英] php datetime->diff is calculating wrong amount of hours (3 too much)

问题描述

我在php中有以下DateTime对象：

I've got the following DateTime object in php:

[start1] => DateTime Object ( 
    [date] => 2012-05-21 12:59:59
    [timezone_type] => 3
    [timezone] => Europe/Berlin
)

[end1] => DateTime Object ( 
    [date] => 2012-05-21 22:36:00
    [timezone_type] => 3
    [timezone] => Europe/Berlin
)

以及结果：

$time->end1->diff($time->start1

是：

DateInterval Object ( [y] => 0 [m] => 0 [d] => 0 [h] => 12 [i] => 36 [s] => 2 [invert] => 1 [days] => 0 )

为什么我得到的是12个小时而不是9个小时？

Why do I get an period of 12 hours and not 9?

推荐答案

我找到了解决方案...在进行差异处理之前，我对start1对象进行了sub（）操作，现在我明白了为什么我的结果是错误的了。但我真的不知道为什么会这样。
http： //www.php.net/manual/en/datetime.sub.php#101175

I've found the solution...Before doing the diff I do a sub() on the start1 object. Now I've seen why my result is false... Here is the answer but I REALLY don't why this is happening. http://www.php.net/manual/en/datetime.sub.php#101175

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