PHP DateTime Diff 2019-12-01 -> 2019-11-01 Month Zero?

Question

i have a huge problem with datetime difference. When i compare this two dates 2019-12-01 and 2019-11-01, there is only 30 days difference and no month, why?

$date2 = new DateTime('2019-12-01');
$date1 = new DateTime("2019-11-01");
$diff = $date1->diff($date2, true)->m;
echo "Difference should be 1 month: ".$diff;

`$diff` is giving me `1` as expected - So what is your question? — B001ᛦ, Jan 27 '20 at 11:44
gives me 0 on PHP 5.6, 1 on PHP 7.2, guess it's a version problem. — Altherius, Jan 27 '20 at 11:48
It depends on the timezone, see: https://stackoverflow.com/questions/40354442/why-does-php-datetime-diff-depend-on-time-zones — Brett Gregson, Jan 27 '20 at 11:51

unclexo · Answer 1 · 2020-01-27T12:18:31.897

Do this way

$date2 = new DateTime("2019-12-01T00:00:00Z");
$date1 = new DateTime("2019-11-01T00:00:00Z");
$diff = $date1->diff($date2, true)->m;
echo "Difference should be 1 month: ".$diff;

The T doesn't really stand for anything. It is just the separator that the ISO 8601 combined date-time format requires. You can read it as an abbreviation for Time.

The Z stands for the Zero timezone, as it is offset by 0 from the Coordinated Universal Time (UTC).

Explained here

See demo here

PHP DateTime Diff 2019-12-01 -> 2019-11-01 Month Zero?

1 Answers1