PHP add up two time variables

Question

In my PHP application I want to calculate the sum of two time variables. I am looking for something like this example.

$time1 = 15:20:00;
$time2 = 00:30:00;
$time = $time1+$time2;

Answer 1

If the answer you expect is 15:50:00 and you want to use strtotime and date functions, you need to subtract the seconds $time1 and $time2 share when you transform them to unix timestamps:

$time1 = '15:20:00';
$time2 = '00:30:00';
$time = strtotime($time1) + strtotime($time2) - strtotime('00:00:00');
$time = date('H:i:s', $time);

Answer 2

The best way to do this is most likely to use strtotime to convert them to timestamps and then do the adding together:

$o = strtotime($time1)+strtotime($time2);

If I remember right strtotime does support this format.

Otherwise you will need to filter it out yourself.