Help11!!!111

<!DOCTYPE html>
<html lang="en">

<head>

    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <meta name="description" content="">
    <meta name="author" content="">

    <title>ryan-service</title>

    <!-- Bootstrap Core CSS -->
    <link href="bootstrap/css/bootstrap.min.css" rel="stylesheet">

    <!-- Custom CSS -->
    <style>
    body {
        padding-top: 70px;
        /* Required padding for .navbar-fixed-top. Remove if using .navbar-static-top. Change if height of navigation changes. */
    }
    </style>
</head>

<body>

    <form class="form-horizontal" action='register.php' method='POST'>
        <div class="form-group">
            <label for="inputUser3" class="col-sm-2 control-label">Benutzername</label>
                <div class="col-sm-10">
                    <input type="text" class="form-control" id="inputUser3" name="inputUser3" placeholder="RPG-City Benutzername">
                </div>
        </div>
        <div class="form-group">
            <label for="inputPassword3" class="col-sm-2 control-label">Passwort</label>
            <div class="col-sm-10">
                <input type="password" class="form-control" id="inputPassword3" name="inputPassword3" placeholder="Gewünschtes Passwort">
            </div>
        </div>
        <div class="form-group">
            <div class="col-sm-offset-2 col-sm-10">
                <button type="submit" name="submit" class="btn btn-default" value='Login'>Account anlegen</button>
            </div>
        </div>
    </form>
    <!-- Navigation -->
    <nav class="navbar navbar-inverse navbar-fixed-top" role="navigation">
        <div class="container">
            <!-- Brand and toggle get grouped for better mobile display -->
            <div class="navbar-header">
                <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
                    <span class="sr-only">Toggle navigation</span>
                    <span class="glyphicon glyphicon-task" aria-hidden="true"></span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                </button>
                <a class="navbar-brand" href="http://www.ryan-service.de/index.html">Home</a>
            </div>
            <!-- Collect the nav links, forms, and other content for toggling -->
            <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
                <ul class="nav navbar-nav">
                    <li>
                        <a href="http://www.ryan-service.de/changelog.html">Updates</a>
                    </li>
                    <li>
                        <a href="http://www.ryan-service.de/register.html">Account Beantragen</a>
                    </li>
                    <li>
                        <a href="http://www.ryan-service.de/contact.html">Bugmelden / Kontakt</a>
                    </li>
                    <li>
                        <a href="http://www.ryan-service.de/acp.html">Adminpanel</a>
                    </li>
                </ul>
            </div>
            <!-- /.navbar-collapse -->
        </div>
        <!-- /.container -->
    </nav>

    <!-- jQuery Version 1.11.1 -->
    <script src="bootstrap/js/jquery.js"></script>

    <!-- Bootstrap Core JavaScript -->
    <script src="bootstrap/js/bootstrap.min.js"></script>

</body>

</html>
<?php
    $host = "localhost";
    $user = "***";
    $pass = "**";
    $db = "**";
    mysql_connect($host, $user, $pass) or die("Die Verbindung zur MySQL Datenbank konnte nicht hergestellt werden. (1)");
    mysql_select_db($db) or die("Die Verbindung zur MySQL Datenbank konnte nicht hergestellt werden. (2)");
    $submit = $_POST['submit'];
    $username = sanitize($_POST['inputUser3']);
    $password = sanitize($_POST['inputPassword3']);
    if($submit) //Wenn er auf den Submit Button klickt
    {
        if($username && $password) //Wenn er sowohl von Username und Passwort tippt und nicht eine von dem (Stand so dort hab also keine Fehler gemacht :D)
        {
            $query = mysql_query("SELECT Name, Passwort FROM accounts WHERE Name = '$username'"); //Auswählen von Username und Passwort ,ändert es in euere Field names , ändert Users in eurer Tabellen Namen ,$username bedeutet username wenn er dass tippt
            if(mysql_num_rows($query) == 0) //if user exists Wenn User existiert
            {
                $create_user = "CREATE USER IF NOT EXISTS '".$username."'@'localhost' IDENTIFIED BY  '".$password."';";
                $user_zuweisen = "GRANT USAGE ON * . * TO  '".$username."'@'localhost' IDENTIFIED BY  '".$password."' WITH MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0 ;";
                $user_rechte = "GRANT ALL PRIVILEGES ON  ".$db." . * TO  '".$username."'@'localhost';";
                <div class="alert alert-success" role="alert"> test </div> //Hier der Fehler?!
            }
            else <div class="alert alert-danger" role="alert">test </div>
        }
        else <div class="alert alert-danger" role="alert">test </div>
    }
?>