timestamp ago created_at
<?
$item->created_at->diffForHumans() ; //3 hours from now
// или
public function getTimeAgo( $created )
{
$startTime = Carbon::parse($created);
$finishTime = Carbon::now();
$totalDuration = $finishTime->diffInSeconds($startTime);
$time = explode(' ', gmdate('d H', $totalDuration));
return $time;
}