英文:
How to make midnight work in PHP for truncating time?
问题
This doesn't set the time to midnight:
new DateTime('first day of -1 month midnight')
It's the same as if midnight weren't there.
Tested in PHP 7.3.33 and PHP 8.2.4.
The documentation of time formats isn't very clear. But even if I take an example straight from it, the behavior differs:
echo (new DateTime('yesterday noon'))->format('Y-m-d h:m');
doesn't output noon, the minute field is non-zero.
I've changed the above back to talk about minutes. Which can be accessed with i, not m. I attempted to correct it, but, as the comments show, I did it incorrectly, leading to confusion. 12 is indeed noon both with h and H. I meant to refer to the hour being 12 at midnight.
英文:
This doesn't set the time to midnight:
new DateTime('first day of -1 month midnight')
It's the same as if midnight weren't there.
Tested in PHP 7.3.33 and PHP 8.2.4.
The documentation of time formats isn't very clear. But even if I take an example straight from it, the behaviour differs:
echo (new DateTime('yesterday noon'))->format('Y-m-d h:m');
doesn't output noon, the minute field is non-zero.
I've changed the above back to talk about minutes. Which can be accessed with i, not m. I attempted to correct it, but, as the comments show, I did it incorrectly, leading to confusion. 12 is indeed noon both with h and H. I meant to refer to the hour being 12 at midnight.
答案1
得分: -2
h 提供从 01 到 12 的值
H 提供从 00 到 23 的值，应在此处使用
英文:
h gives values from 01 to 12
H gives values from 00 to 23 and should be used here
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