从另一个DateInterval中减去DateInterval

Question

$date1 = new DateInterval('PT100S'); //100 seconds
$date2 = new DateInterval('PT20S');  //20 seconds

How to make $date1 - $date2? I've searched on google for hours.

Answer 1

Use format to get the number of seconds, then do the subtraction.

echo $date1->format('%s') - $date2->format('%s');

_{Is this what you wanted?}