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Adding 30 minutes to time formatted as H:i in PHP

Asked 2010-05-04T16:24:35.197
51

Having a nightmare at the moment and just can't see why it isn't working

I have a value in the form H:i (ie 10:00, 13:30) etc called $time

What I want to do is create two new values, $startTime which is 30 mins before $time and $endTime which is 30 mins after $time

I have tried the following but just doesn't seem to want to work

$startTime = date("H:i",strtotime('-30 minutes',$time));
$endTime = date("H:i",strtotime('+30 minutes',$time));

If I pass through 10:00 as $time and echo out both $startTime and $endTime I get:

$startTime = 00:30
$startTime = 01:30
php strtotime
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1 Answer

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Your current solution does not work because $time is a string - it needs to be a Unix timestamp. You can do this instead:

$unix_time = strtotime('January 1 2010 '.$time); // create a unix timestamp
$startTime date( "H:i", strtotime('-30 minutes', $unix_time) );
$endTime date( "H:i", strtotime('+30 minutes', $unix_time) );
answered 2010-05-04T16:37:01.440

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