/**
* Get the difference in seconds
*
* @param Carbon $dt
* @param boolean $abs Get the absolute of the difference
*
* @return integer
*/
public function diffInSeconds(Carbon $dt = null, $abs = true)
{
$value = ($dt === null ? time() : $dt->getTimestamp()) - $this->getTimestamp();
return $abs ? abs($value) : $value;
}
