javascript/php redirect

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <h1>test</h1>
    <?php

    $urlvar = "https://www.php.net";

    ?>

    <script>
    window.location.replace("<?php echo $urlvar; ?>");
    </script>
</body>
</html>