Question

I need to find how much time is between to time values (their difference) which are over 24:00:00.

For example: how can I calculate the difference between 42:00:00 and 37:30:00?

Using strtotime, strptotime, etc is useless since they cannot go over 23:59:59 ….

Answer 1

$a_split = explode(":", "42:00:00");
$b_split = explode(":", "37:30:00");

$a_stamp = mktime($a_split[0], $a_split[1], $a_split[2]);
$b_stamp = mktime($b_split[0], $b_split[1], $b_split[2]);

if($a_stamp > $b_stamp)
{
 $diff = $a_stamp - $b_stamp;
}else{
 $diff = $b_stamp - $a_stamp;
}

echo "difference in time (seconds): " . $diff;

then use date() to convert seconds to HH:MM:SS if you want.