Work Username Update

<?php
session_start();
$pdo = new PDO('mysql:host=localhost;dbname=zocker-ka', 'zocker-ka', 'IbdN1hahaha');

if(isset($_GET['updatename'])) {
  mysql_connect("localhost","","");
  mysql_select_db("");

$email = $_POST['email'];
$passwort = $_POST['passwort'];
$name = $_POST['name'];

  $verbot = mysql_query("SELECT verbot FROM verboten");
  while($row = mysql_fetch_assoc($verbot)) {
if(strpos($name, $row['verbot'])!==false) {
die('Dieser Beitrag ist nicht erlaubt');
  }
  }

$statement = $pdo->prepare("SELECT * FROM users WHERE email = :email");
    $result = $statement->execute(array('email' => $email));
    $user = $statement->fetch();
    if ($user !== false && password_verify($passwort, $user['passwort'])) {
        $_SESSION['userid'] = $user['id'];

$statement = $pdo->prepare("UPDATE users SET name = :name WHERE email = :email");
$result = $statement->execute(array('name' => $name, 'email' => $email));
?>
<script>alert("erfolgreich gesendet");</script>
<?php
}
else {
        $errorMessage = "E-Mail oder Passwort war ungültig<br>";
    }
}
if(isset($errorMessage)) {
    ?>
    <script>alert("Bitte überprüfen sie ihre Daten nochmal, es ist ein Fehler aufgetreten.")</script>
    <?php
}
?>
 <html>
    <head>
    <link href="/css/standart.css" rel="stylesheet">
    <title>Userbereich</title>
     </head>
     <body>
     <nav>
<ul>
<li><a href="/">Home</a></li>
<li><a href="/login">Login</a>
<ul>
<li><a href="/login/login.php">Log In</a></li>
<li><a href="/login/registrieren.php">Registrieren</a></li>
<li><a href="/login/logout.php">Log Out</a></li>
</ul>
</li>
<li><a href="/login/geheim.php">aktuelle Seite</a></li>
<li><a href="/newsletter">Newsletter</a></li>
<li><a href="/fragen">Frage stellen</a></li>
<li><a href="/admin_area">Admin Area</a></li>
<li><a href="/userlist">Userlist</a></li>
<li><a href="/forum">Forum</a></li>
</ul>
</nav>
<br /><br /><br /><br /><br /><br />
     <h1> Hallo</h1>
     <h2>Username ändern:<br />
     <form action="?updatename=1" method="post">
     E-Mail:<br />
     <input type="email" name="email" maxlength="40" size="40" /><br />
     Neuer Name:<br />
     <input type="text" name="name" maxlength="20" size="40" /><br />
     Passwort:<br />
     <input type="password" name="passwort" maxlength="250" size="40" /><br />
     <input type="submit" name="ändern" value="ändern" />
     </form>
     </h2>
     </body>
</html>