php - How to add an hour onto the time of this datetime string?

Question

Here's an example of the datetime strings I am working with:

Tue May 15 10:14:30 +0000 2012

Here is my attempt to add an hour onto it:

$time = 'Tue May 15 10:14:30 +0000 2012';
$dt = new DateTime($time);
$dt->add(new DateInterval('P1h'));

But the second line gives the error that it couldn't be converted.

Thanks.

Answer 1

You should add a T before the time specification part:

$time = 'Tue May 15 10:14:30 +0000 2012';
$dt = new DateTime($time);
$dt->add(new DateInterval('PT1H'));

See the DateInterval constructor documentation:

The format starts with the letter P, for "period." Each duration period is represented by an integer value followed by a period designator. If the duration contains time elements, that portion of the specification is preceded by the letter T.

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