Untitled

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
<form method="get">
    <input type="text" name="dateOne"/>
    <input type="text" name="dateTwo"/>
    <input type="submit"/>
</form>

<?php
if(isset($_GET['dateOne'], $_GET['dateTwo'])) {
    $startDate = new DateTime($_GET['dateOne']);
    $endDate = new DateTime($_GET['dateTwo']);
    $Thursdays = [];

    while ($startDate <= $endDate) {
        $dateString =$startDate->format('d-M-Y');
        $dayOfWeek = date('N', strtotime($dateString));
        if ($dayOfWeek == '4') {
            $Thursdays[] = date_format($startDate, 'd-m-Y');
        }
        $startDate->add(new DateInterval('P1D'));
    }

    if (empty($Thursdays)) {
        echo "<h2>No Thursdays</h2>";
    } else {
        echo "<ol>";
        foreach ($Thursdays as $thy) {
            echo "<li>$thy</li>";
        }
        echo "</ol>";
    }
}
?>

</body>
</html>