function getWorkingDays($startDate,$endDate,$holidays){ $endDate = strtotime($endDate); $startDate = strtotime($startDate); $days = ($endDate - $startDate) / 86400 + 1; $no_full_weeks = floor($days / 7); $no_remaining_days = fmod($days, 7); $the_first_day_of_week = date("N", $startDate); $the_last_day_of_week = date("N", $endDate); if ($the_first_day_of_week <= $the_last_day_of_week) { if ($the_first_day_of_week <= 6 && 6 <= $the_last_day_of_week) $no_remaining_days--; if ($the_first_day_of_week <= 7 && 7 <= $the_last_day_of_week) $no_remaining_days--; } else { if ($the_first_day_of_week == 7) { $no_remaining_days--; if ($the_last_day_of_week == 6) { $no_remaining_days--; } } else { $no_remaining_days -= 2; } } $workingDays = $no_full_weeks * 5; if ($no_remaining_days > 0 ) { $workingDays += $no_remaining_days; } foreach($holidays as $holiday){ $time_stamp=strtotime($holiday); if ($startDate <= $time_stamp && $time_stamp <= $endDate && date("N",$time_stamp) != 6 && date("N",$time_stamp) != 7) $workingDays--; } return $workingDays; }
$holidays = array("2021-12-25", "2021-12-26", "2021-01-01");
echo getWorkingDays("2021-12-22", "2021-01-02", $holidays);
