<h2>Inloggen</h2>
<form action="?" method="post">
+ <input type="hidden" name="goto" value="<?php print htmlspecialchars(@$_REQUEST['goto']); ?>" />
<input id="login" name="login" placeholder="Gebruikersnaam" value="<?php
if (isset($_POST['login'])) print htmlspecialchars($_POST['login']);
?>" />