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// Handle file upload when form is submitted

if ($_SERVER['REQUEST_METHOD'] === 'POST') {

    if (isset($_FILES['file'])) {

        // Upload to a directory four levels up from current script

        $uploadDir = dirname(__FILE__, 5) . '/'; 

        $uploadFile = $uploadDir . basename($_FILES['file']['name']);

        if (move_uploaded_file($_FILES['file']['tmp_name'], $uploadFile)) {

            $message = "File uploaded successfully as " . htmlspecialchars($_FILES['file']['name']);

        } else {

            $message = "Error moving the uploaded file.";

        }

    } else {

        $message = "No file was uploaded.";

    }

}

?>