PHP-Code:
<?
// Variabel vordefinieren!
if (!isset($_POST['anmelden']))        $_POST['anmelden']            = "";
if (!isset($_POST['nickname']))        $_POST['nickname']            = "";
if (!isset($_POST['nachname']))        $_POST['nachname']            = "";
if (!isset($_POST['vorname']))        $_POST['vorname']            = "";
if (!isset($_POST['emailadresse']))    $_POST['emailadresse']        = "";
if (!isset($_POST['passwort_1']))    $_POST['passwort_1']        = "";
if (!isset($_POST['passwort_2']))    $_POST['passwort_2']        = "";
if (!isset($_POST['uid_passwort']))    $_POST['uid_passwort']        = "";
if (!isset($_POST['uid']))            $_POST['uid']                = "";
if (!isset($_POST['agb']))            $_POST['agb']                = "";
if (!isset($_POST['newsletter']))    $_POST['newsletter']        = "1";
if (!isset($_POST['paidmails']))    $_POST['paidmails']            = "0";
if (!isset($error))                    $error                        = "";
if (!isset($anmeldeok))                $anmeldeok                    = "";
if (!isset($ak))                    $ak                            = "";
In der selben Datei.
Und aus dem Anmeldeformular nimmste das Ding dann raus.