Расчет продолжительности времени Ларавел
$t1 = Carbon::parse('2016-07-05 12:29:16');
$t2 = Carbon::parse('2016-07-04 13:30:10');
$diff = $t1->diff($t2);
Sibaprasad Maiti
$t1 = Carbon::parse('2016-07-05 12:29:16');
$t2 = Carbon::parse('2016-07-04 13:30:10');
$diff = $t1->diff($t2);