if(empty($_POST['email']) && $_POST['submit']) {
    $db->insert( $prefix."shop_zahlen", array( "email" => $_POST['email'], "spielername" => $_POST['spielername'], "steamid64" => $_POST['steamid64'], "pscnummer" => $_POST['pscnummer'] ));

echo '<center><div class="ue">Danke, Wir melden uns per E-Mail, TS3 oder Ingame sobald dein Premium Freigeschaltet ist!</div></center><br><br><br>';
    } else {
echo 'Fehler';
}

echo '<table style="width: 60%;">';
    echo '<form action="" method="post">
    <tr><td>Deine Paysafecard Nummer</td><td><input name="pscnummer" style="width: 400px" type="text" /></td></tr>
<tr><td></td></tr><tr><td></td></tr><tr><td></td></tr><tr><td></td></tr><tr><td></td></tr><tr><td></td></tr><tr><td></td></tr><tr><td></td></tr><tr><td></td></tr><tr><td></td></tr><tr><td></td></tr><tr><td></td></tr>
    <tr><td>Deine E-Mail</td><td><input name="email" style="width: 400px" type="text" /></td></tr>
    <tr><td>Dein Server Spielername</td><td><input name="spielername" style="width: 400px" type="text" /></td></tr>
    <tr><td>Deine SteamID64</td><td><input name="steamid64" style="width: 400px" type="text" /></td></tr>
<tr><td></td></tr><tr><td></td></tr><tr><td></td></tr><tr><td></td></tr>
    <tr><td><input name="submit" type="submit" value="Jetzt Kaufen" /></td></tr>
    </form>';
echo '</table>';