src/Khayyam/Khayyam.php
public function diffInWeekdays(Carbon $dt = null, $abs = true)
     {
         return $this->diffInDaysFiltered(function (Carbon $date) {
                return $date->isWeekday();
          }, $dt, $abs);
     }
public function diffInWeekdays(Carbon $dt = null, $abs = true)
     {
         return $this->diffInDaysFiltered(function (Carbon $date) {
                return $date->isWeekday();
          }, $dt, $abs);
     }
Get the difference in weekdays

@param Carbon  $dt
@param boolean $abs Get the absolute of the difference

@return int