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我有一個用於登錄Laravel的Facebook身份驗證系統，當具有所有屬性的用戶登錄時工作正常，但是當用戶沒有填寫屬性，它拋出一個錯誤（例如）：如何檢查一個屬性是否存在（FB認證）與Laravel Oauth2
未定義的屬性：stdClass的:: $生物
下面是相關代碼：
Facebook.php：
public function get_user_info(Token_Access $token)
{
$url = 'https://graph.facebook.com/me?'.http_build_query(array(
'access_token' => $token->access_token,
));
$user = json_decode(file_get_contents($url));
// Create a response from the request
return array(
'uid' => $user->id,
'nickname' => $user->username,
'name' => $user->name,
'first_name' => $user->first_name,
'last_name' => $user->last_name,
'gender' => $user->gender,
'email' => $user->email,
'birthday' => $user->birthday,
'location' => $user->location->name,
'description' => $user->bio, //the line giving trouble for a user
'friends' => 'https://graph.facebook.com/me/friends?fields=id&access_token='.$token->access_token,
'image' => 'https://graph.facebook.com/me/picture?width=200&height=200&access_token='.$token->access_token,
'urls' => array(
'Facebook' => $user->link,
),
);
}
Oauth2Controller.php：
if(is_null($check)) {
$fan = new Fan;
$fan->fbid = $user['uid'];
$fan->email = $user['email'];
$fan->first_name = $user['first_name'];
$fan->last_name = $user['last_name'];
$fan->gender = $user['gender'];
$fan->birthday = $user['birthday'];
$fan->age = $age;
$fan->city = $city;
$fan->state = $state_abbrev;
$fan->image = $user['image'];
$fan->friend_ids_url = $user['friends'];
$fan->friend_ids_unpacked = $friend_ids;
$fan->save();
$new = Fan::where('fbid', '=', $user['uid'])->first();
Auth::login($new);
return Redirect::to('fans/home');
}
如何檢查一個用戶擁有包含他們的個人資料，這些領域的，所以我沒有這個錯誤拋出？謝謝。