Problem2

<?php
if (isset($_GET['dateOne'])&&isset($_GET['dateTwo'])&&isset($_GET['holidays'])) {

    $dateStart = new DateTime($_GET['dateOne']);
    $dateEnd = new DateTime($_GET['dateTwo']);
    $dateEnd->modify('+1 day');

    $arr = explode("\n",$_GET['holidays']);
    foreach ($arr as $row) {
        if ($row!='') {
            $holidays[]=new DateTime($row);
        }
    }

    $diff=$dateStart->diff($dateEnd);

    while ($diff->d>0) {
        $isHoliday=false;
        if (isset($holidays)) {
            foreach ($holidays as $holiday) {
                if ($holiday->format('d-m-Y')==$dateStart->format('d-m-Y')) {
                    $isHoliday=true;
                }
            }
        }

        if (date('l',$dateStart->getTimestamp())!='Sunday'&&date('l',$dateStart->getTimestamp())!='Saturday'&&!$isHoliday) {
            $workingDates[]=$dateStart->format('d-m-Y');
        }
        $dateStart->modify('+1 day');
        $diff=$dateStart->diff($dateEnd);
    }

    if (isset($workingDates)) {
        echo '<ol>';
        foreach ($workingDates as $workingDate) {
            echo "<li>$workingDate</li>";
        }
        echo '</ol>';
    } else {
        echo '<h2>No workdays</h2>';
    }
}
?>