Bham Bham - 18 days ago 6
PHP Question

PHP calc difference between time greater than 24 hours

What is the best way to calculate the difference in time, when time is greater than 24 hours.

Example

$time1 = '76:00:00';
$time2 = '30:00:00';

// result should be 46:00:00
echo date('H:i:s', strtotime($time1) - strtotime($time2));


But this could not be done with this because its greater then 24 hours.

Also in a database i've stored a time like this: 33:30:00
How in php could i format it to: 33:30

Answer

Use \DateTime and \DateInterval to perform calculations:

$date1 = new \DateTime();
$date2 = new \DateTime();
$time1 = new \DateInterval('PT76H');
$time2 = new \DateInterval('PT30H');

$date1->add($time1);
$date2->add($time2);

$diff = $date1->diff($date2);
echo ($diff->days * 24 + $diff->h) . $diff->format(':%I:%S');

Explanation: It's not possible to perform calculations directly on DateIntervals, so you have to create dates as a basis for calculations. Then add two different intervals to current dates, and calculate a difference between them. diff() returns \DateInterval that contains total number of days, that you have to multiply by 24 to get hours, and hours that don't make full days.