Question

嗨，我遇到了一个网上找不到解决方案的问题。我正在尝试使用Facebook登录名登录我的网站。这是我的代码。 getAccessToken（）方法始终返回null。请帮助我解决此错误。谢谢。下面是我的代码。

这是我的fbConfig.php文件

    <?php
    if(!session_id()){
        session_start();
    }

    //Include the autoloader provided in the SDK
    require_once 'C:\xampp\htdocs\FBFunApp\php-graph-sdk-5.x\src\Facebook\autoload.php';


    //Include required libraries
    use Facebook\Facebook;
    use Facebook\Exceptions\FacebookResponseException;
    use Facebook\Exceptions\FacebookSDKException;

    /*
     * Configuration and setup Facebook SDK
    */
    $appId         = '560615054394144'; //Facebook App ID
    $appSecret     = 'AAAAAAAAAAAAAAAAAAAA'; //Facebook App Secret
    $redirectURL   = 'http://localhost:8080/FBFunApp/views/login.php'; //Callback URL
    $fbPermissions = array('email');  //Optional permissions


    $fb = new Facebook(array('app_id' => $appId,'app_secret' => $appSecret,'default_graph_version' => 'v2.10',));

    // Get redirect login helper
    $helper = $fb->getRedirectLoginHelper();

    // Try to get access token
    try {  
        if(isset($_SESSION['facebook_access_token'])){ 
            $accessToken = $_SESSION['facebook_access_token'];
        }else{ 
            $accessToken = $helper->getAccessToken(); 
            var_dump($accessToken); //returns null
        }
    } catch(FacebookResponseException $e) {
        echo 'Graph returned an error: ' . $e->getMessage();
        exit;
    } catch(FacebookSDKException $e) {
        echo 'Facebook SDK returned an error: ' . $e->getMessage();
        exit;
    }catch(Exception $e){
        echo 'Exception: '+$e->getMessage();
        exit;
    }   

?>

这是login.php文件。内部使用配置文件。

<?php 
    //Include FB config file & User class
    require_once '../config/fbConfig.php';
    require_once '../controllers/User.php';

    if(isset($accessToken)){
        if(isset($_SESSION['facebook_access_token'])){
            $fb->setDefaultAccessToken($_SESSION['facebook_access_token']);
        }else{
            //Put short-lived access token in session
            $_SESSION['facebook_access_token'] = (string) $accessToken;

            // OAuth 2.0 client handler helps to manage access tokens
            $oAuth2Client = $fb->getOAuth2Client();

            // Exchanges a short-lived access token for a long-lived one
            $longLivedAccessToken = $oAuth2Client->getLongLivedAccessToken($_SESSION['facebook_access_token']);
            $_SESSION['facebook_access_token'] = (string) $longLivedAccessToken;

            // Set default access token to be used in script
            $fb->setDefaultAccessToken($_SESSION['facebook_access_token']);
        }

        // Redirect the user back to the same page if url has "code" parameter in query string
        if(isset($_GET['code'])){ 
            header('Location: ./');                 
        }

        // Getting user facebook profile info
        try {
            $profileRequest = $fb->get('/me?fields=name,first_name,last_name,email,link,gender,locale,cover,picture');
            $fbUserProfile = $profileRequest->getGraphNode()->asArray();
            print_r($fbUserProfile);
        } catch(FacebookResponseException $e) { 
            echo 'Graph returned an error: ' . $e->getMessage();
            session_destroy();
            // Redirect user back to app login page
            header("Location: ./");
            exit;
        } catch(FacebookSDKException $e) {
            echo 'Facebook SDK returned an error: ' . $e->getMessage();
            exit;
        }

        // Initialize User class
        $user = new User();

        // Insert or update user data to the database
        $fbUserData = array(
            'oauth_provider'=> 'facebook',
            'oauth_uid'     => $fbUserProfile['id'],
            'first_name'    => $fbUserProfile['first_name'],
            'last_name'     => $fbUserProfile['last_name'],
            'email'         => $fbUserProfile['email'],
            'gender'        => $fbUserProfile['gender'],
            'locale'        => $fbUserProfile['locale'],
            'cover'         => $fbUserProfile['cover']['source'],
            'picture'       => $fbUserProfile['picture']['url'],
            'link'          => $fbUserProfile['link']
        );

        $userData = $user->checkUser($fbUserData);      


        // Put user data into session
        $_SESSION['userData'] = $userData;

        // Get logout url
        $logoutURL = $helper->getLogoutUrl($accessToken, $redirectURL.'views/logout.php');

        // Render facebook profile data
        if(!empty($userData)){
            $output  = '<h2 style="color:#999999;">Facebook Profile Details</h2>';
            $output .= '<div style="position: relative;">';
            $output .= '<img src="'.$userData['cover'].'" />';
            $output .= '<img style="position: absolute; top: 90%; left: 25%;" src="'.$userData['picture'].'"/>';
            $output .= '</div>';
            $output .= '<br/>Facebook ID : '.$userData['oauth_uid'];
            $output .= '<br/>Name : '.$userData['first_name'].' '.$userData['last_name'];
            $output .= '<br/>Email : '.$userData['email'];
            $output .= '<br/>Gender : '.$userData['gender'];
            $output .= '<br/>Locale : '.$userData['locale'];
            $output .= '<br/>Logged in with : Facebook';
            $output .= '<br/>Profile Link : <a href="'.$userData['link'].'" target="_blank">Click to visit Facebook page</a>';
            $output .= '<br/>Logout from <a href="'.$logoutURL.'">Facebook</a>'; 
        }else{
            $output = '<h3 style="color:red">Some problem occurred, please try again.</h3>';
        }       
    }else{
        // Get login url        
        $loginURL = $helper->getLoginUrl($redirectURL, $fbPermissions); 

        // Render facebook login button
        $output = '<a href="'.htmlspecialchars($loginURL).'"><img src="../images/app/fb-login.png"></a>';
    }
?>

<html>
<head>
<title>Login with Facebook</title>
</head>
<body>
    <!-- Display login button / Facebook profile information -->
    <div><?php echo $output; ?></div>
</body>
</html>

Answer 1

facebook api更新后：每个请求网址必须为Https 所以，

更改此：-

$redirectURL = 'http://localhost:8080/FBFunApp/views/login.php'; //Callback URL

收件人：

$redirectURL = 'https://localhost:8080/FBFunApp/views/login.php'; //Callback URL

您可以使用更改网络服务器设置或使用默认端口：-ssl 443来完成此操作。

快乐编码：）

getAccessToken（）方法在facebook PHP SDK 5中返回null

1 个答案: