A simple function to find work days in a time period, using DateTime, DateInterval and DatePeriod. Some refactoring tips are appreciated =)

workdDays.php

<?php
function findWorkDays($dateStart, $dateEnd)
{
    $oneWeek = new \DateInterval('P7D');
    $date1 = new \DateTime($dateStart);
    $date2 = new \DateTime($dateEnd);
    $interval = $date1->diff($date2);
    $freeDays = 0;

    //Finding saturdays
    $satObj = clone $date1;
    $saturdays = new \DatePeriod($satObj->modify('saturday'), $oneWeek, $date2);
    foreach ($saturdays as $saturday) {
        $freeDays++;
    }

    //Finding sundays
    $sunObj = clone $date1;
    $sundays = new \DatePeriod($sunObj->modify('sunday'), $oneWeek, $date2);
    foreach ($sundays as $sunday) {
        $freeDays++;
    }

    return $interval->days - $freeDays + 1;
}

Currently it doesn't consider holydays