PDO无法获取

Question

为什么PDO不能在这里获取？：$userInfo = $user->fetch();

//User Data
$user = $dbh->prepare('SELECT * FROM users JOIN levels ON users.level = levels.level WHERE users.id = :id and users.login = :login LIMIT 1');
$userID = $_SESSION['userID'];
$loginName = $_SESSION['loginName'];
$user->execute(array(':id' => $userID, ':login' => $loginName));
$userInfo = $user->fetch();
$lvlPerc = ($userInfo['users.xp'] / $userInfo['levels.xp']) * 100;

//Check if banned or !Authorized
if ($userInfo['status'] != "2") {
    session_destroy();
    unset ($_SESSION['userID']);
    unset ($_SESSION['userLogin']);
    header ("Location: /login");
    exit();
}