Question

我在laravel 5.1中使用facebook graph api。我已经安装了它usnig composer command

composer require facebook/php-sdk-v4

已经安装了facebook graph api 但是当我在laravel中创建facebook api对象时，它会给我这个错误

Class 'App\Http\Controllers\Userapp\Facebook\Facebook' not found

就在这一行

$fb = new Facebook\Facebook([

这是我的控制器文件

<?php namespace App\Http\Controllers\Userapp;
require_once( base_path('vendor/facebook/php-sdk-v4/src/Facebook/autoload.php') );
// Facebook Requires
use Facebook\FacebookSession;
use Facebook\FacebookRedirectLoginHelper;
use Facebook\FacebookRequest;
use Facebook\FacebookResponse;
use Facebook\FacebookSDKException;
use Facebook\FacebookRequestException;
use Facebook\FacebookAuthorizationException;
use Facebook\GraphObject;
use Facebook\Entities\AccessToken;
use Facebook\HttpClients\FacebookHttpable;
use Facebook\HttpClients\FacebookCurlHttpClient;
use Facebook\HttpClients\FacebookCurl;

和控制器的功能

public function index()
    {   
        // init app with app id and secret
        $fb = new Facebook\Facebook([
          'app_id' => 'xxxxxxxxxxxxxxx',
          'app_secret' => 'xxxxxxxxxxxxxxxxx',
          'default_graph_version' => 'v2.5',
          //'default_access_token' => '{access-token}', // optional
        ]);


        try {
          // Get the Facebook\GraphNodes\GraphUser object for the current user.
          // If you provided a 'default_access_token', the '{access-token}' is optional.
          $response = $fb->get('/me', '{access-token}');
        } catch(Facebook\Exceptions\FacebookResponseException $e) {
          // When Graph returns an error
          echo 'Graph returned an error: ' . $e->getMessage();
          exit;
        } catch(Facebook\Exceptions\FacebookSDKException $e) {
          // When validation fails or other local issues
          echo 'Facebook SDK returned an error: ' . $e->getMessage();
          exit;
        }

        $me = $response->getGraphUser();
        echo 'Logged in as ' . $me->getName();
    }

请帮助我解决这个问题。我真的很感激感谢

Answer 1

在index函数中，您不在全局范围内，因此当您将该类称为Facebook\Facebook时，PHP认为您正在调用Facebook\Facebook命名空间中声明的App\Http\Controllers\Userapp。

您需要像下面一样全面引用它们，并预先加\。

public function index()
{
    $fb = new \Facebook\Facebook([]);
    // your code
    catch(\Facebook\Exceptions\FacebookResponseException $e)
    // your code
    catch(\Facebook\Exceptions\FacebookSDKException $e)
    // your code
}

或使用别名。

use Facebook\Facebook as Facebook;
use Facebook\Exceptions\FacebookResponseException as FacebookResponseException
use Facebook\Exceptions\FacebookSDKException as FacebookSDKException

public function index()
{
    $fb = new Facebook([]);
    // your code
    catch(FacebookResponseException $e)
    // your code
    catch(FacebookSDKException $e)
    // your code
 }

在laravel 5 facebook graph api中找不到Facebook类

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