dann bin ich zu blöd dazu :-(
if(preg_match('/^[a-zA-Z0-9]$/', $nick))
{
mysql_query ("INSERT INTO omega_user (`Name`, `Passwort`, `E-Mail`) VALUES ('$nick', '$pw', '$mail')");
echo "
<html>
<head>
<meta name='autor' content='Lennart Werner'>
<meta http-equiv='refresh'...