Get a DateTime for one week ago

Question

I want to get the DateTime of one week ago to use it in a query. So I've done:

$date = new DateTime();
$date->sub(new DateInterval('P7D'));
$date = $date->format('Y-m-d H:i:s');

But for some reason this is not working right. Any idea of what I'm doing wrong?

Answer 1

DateTime::sub() returns a new DateTime object. It doesn't change the original object at all.

$date = new DateTime();
$newdate = $date->sub(new DateInterval('P7D'));
$date = $newdate->format('Y-m-d H:i:s');

Demo

If you want to do this a little simpler:

$date = new DateTime('-1 week');
$date = $date->format('Y-m-d H:i:s');

Demo