Connecting Laravel with facebook SDK

我正在尝试连接Facebook，并获得用户名，电子邮件和位置。

我在理解权限和范围方面有困难。我的代码只返回这个

Array
(
    [name] => Ben Shepherd
    [id] => 123xxxxxxxxxx
)

public function facebookRedirect()
{
    $facebook = new Facebook(Config::get('facebook'));
    $params = array(
        'redirect_uri' => URL::route('takepart.facebook.callback'),
        'scope' => 'public_profile'
    );
    return Redirect::to($facebook->getLoginUrl($params));
}
public function facebookCallback()
{
    $code = Input::get('code');
    if (strlen($code) == 0) return Redirect::to('/')->with('message', 'There was an error communicating with Facebook');
    $facebook = new Facebook(Config::get('facebook'));
    $uid = $facebook->getUser();
    if ($uid == 0) return Redirect::to('/')->with('message', 'There was an error');
    $me = $facebook->api('/me');
    Helper::pr($me);
}