CODEWITHSUNDEEP
phpdatetimedateinterval
user1719210
user1719210

Reputation: 318

How can i substract time from a DateInterval object (PHP)?

I would like to add some time to a DateInterval that is so the result of a DateTime->diff method How can I do that?

Here is a simple sample of code :

$d1 = "2024-01-01 00:00";
$d2 = date('Y-m-d H:i');
$dt1 = new DateTime($d1);
$dt2 = new DateTime($d2);

$interval = $dt1->diff($dt2);

$interval->sub('PT1H');
$interval->modify('-1 hour');

Result

Call to undefined method DateInterval::sub() 
Call to undefined method DateInterval::modify()

Is this possible that there is no existing method to modify a DateInterval? So what is the good practice?

Thank you a lot in advance :)

Upvotes: 0

Views: 66

Answers (1)

ogash
ogash

Reputation: 149

It's normal that you get the error.

Normally, DateInterval have no such methods, to achieve what you want, you can modify the original DateTime object instead of the DateInterval, like:

$d1 = "2024-01-01 00:00";
$d2 = date('Y-m-d H:i');
$dt1 = new DateTime($d1);
$dt2 = new DateTime($d2);

$interval = $dt1->diff($dt2);

$dt1->sub(new DateInterval('PT1H'));

$dt1->modify('-1 hour');

echo $dt1->format('Y-m-d H:i');

Upvotes: 1

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