Question

我在官方网页上寻找文档，但没有任何帮助，所以我构建了这个代码并且它不起作用。

    FacebookSession::setDefaultApplication('app-id', 'app-secret');
$helper = new \Facebook\FacebookRedirectLoginHelper('http://my-return-url');

if (isset($_SESSION['token'])) {
    $session = new FacebookSession($_SESSION['token']);
    if (!$session->validate()) {
        $session = null;
    }
} else {
    try {
        $session = $helper->getSessionFromRedirect();
    } catch(FacebookRequestException $ex) {
        die("Oops! :/");
    } catch(Exception $ex) {
        die($ex->message());
    }
}

if (isset($session)) {
    $_SESSION['token'] = $session->getToken();
    $session = new FacebookSession($session->getToken());

    $request = new FacebookRequest($session, 'GET', '/me');
    $response = $request->execute();
    $graphObject = $response->getGraphObject()->asArray();

    echo '<pre>';
    print_r($graphObject);
    echo '</pre>';
} else {
    echo '<a href="' . $helper->getLoginUrl() . '">Login</a>';
}

我认为问题出在SDK中，但我不确定。我总是得到这个错误：

致命错误：未捕获的异常＆＃39; Facebook \ FacebookSDKException＆＃39;消息＆＃39;会话已过期，或对此应用无效。＆＃39;在/var/www/html/Facebook/FacebookSession.php:238堆栈跟踪：＃0 /var/www/html/Facebook/FacebookSession.php(216):Facebook \ FacebookSession :: validateSessionInfo（Object（Facebook \ GraphSessionInfo），＆＃39; my-app-id＆＃39;，＆＃39; app-secret ...＆＃39;）＃1 /var/www/html/verify.php(98）：Facebook \ FacebookSession-＆gt;第238行/var/www/html/Facebook/FacebookSession.php中的validate（）＃2 {main}

我还尝试通过隐身模式尝试设置新应用，但总是出现此错误。

Answer 1

我同意，FB文件非常糟糕。此外，他们经常更改他们的SDK版本，几天前他们发布了v 4.0.5。试试这个 - ＆gt;

<?php

// include required files form Facebook SDK

// added in v4.0.5
require_once( 'Facebook/FacebookHttpable.php' );
require_once( 'Facebook/FacebookCurl.php' );
require_once( 'Facebook/FacebookCurlHttpClient.php' );

// added in v4.0.0
require_once( 'Facebook/FacebookSession.php' );
require_once( 'Facebook/FacebookRedirectLoginHelper.php' );
require_once( 'Facebook/FacebookRequest.php' );
require_once( 'Facebook/FacebookResponse.php' );
require_once( 'Facebook/FacebookSDKException.php' );
require_once( 'Facebook/FacebookRequestException.php' );
require_once( 'Facebook/FacebookOtherException.php' );
require_once( 'Facebook/FacebookAuthorizationException.php' );
require_once( 'Facebook/GraphObject.php' );
require_once( 'Facebook/GraphSessionInfo.php' );

// added in v4.0.5
use Facebook\FacebookHttpable;
use Facebook\FacebookCurl;
use Facebook\FacebookCurlHttpClient;

// added in v4.0.0
use Facebook\FacebookSession;
use Facebook\FacebookRedirectLoginHelper;
use Facebook\FacebookRequest;
use Facebook\FacebookResponse;
use Facebook\FacebookSDKException;
use Facebook\FacebookRequestException;
use Facebook\FacebookOtherException;
use Facebook\FacebookAuthorizationException;
use Facebook\GraphObject;
use Facebook\GraphSessionInfo;

// start session
session_start();

// init app with app id and secret
FacebookSession::setDefaultApplication( 'xxx','yyy' );

// login helper with redirect_uri
$helper = new FacebookRedirectLoginHelper( 'http://yourwebsite.com/app/' );

// see if a existing session exists
if ( isset( $_SESSION ) && isset( $_SESSION['fb_token'] ) ) {
  // create new session from saved access_token
  $session = new FacebookSession( $_SESSION['fb_token'] );

  // validate the access_token to make sure it's still valid
  try {
    if ( !$session->validate() ) {
      $session = null;
    }
  } catch ( Exception $e ) {
    // catch any exceptions
    $session = null;
  }

} else {
  // no session exists

  try {
    $session = $helper->getSessionFromRedirect();
  } catch( FacebookRequestException $ex ) {
    // When Facebook returns an error
  } catch( Exception $ex ) {
    // When validation fails or other local issues
    echo $ex->message;
  }

}

// see if we have a session
if ( isset( $session ) ) {

  // save the session
  $_SESSION['fb_token'] = $session->getToken();
  // create a session using saved token or the new one we generated at login
  $session = new FacebookSession( $session->getToken() );

  // graph api request for user data
  $request = new FacebookRequest( $session, 'GET', '/me' );
  $response = $request->execute();
  // get response
  $graphObject = $response->getGraphObject()->asArray();

  // print profile data
  echo '<pre>' . print_r( $graphObject, 1 ) . '</pre>';

  // print logout url using session and redirect_uri (logout.php page should destroy the session)
  echo '<a href="' . $helper->getLogoutUrl( $session, 'http://yourwebsite.com/app/logout.php' ) . '">Logout</a>';

} else {
  // show login url
  echo '<a href="' . $helper->getLoginUrl( array( 'email', 'user_friends' ) ) . '">Login</a>';
}

Source

Answer 2

避免PHP facebook SDK 4.0登录错误的步骤

如果您使用的是Windows操作系统，请先在PC中安装composer。
下载facebook SDK 4.0并重命名您想要的内容（例如： fbsdk ）。
运行命令提示符并找到最近下载的sdk文件夹。
检查是否存在composer.json文件
如果存在composer.json文件，则输入以下命令： composer install否则您已在同一文件夹中创建了新文件composer.json，其代码如下：{ "require" : { "facebook/php-sdk-v4" : "4.0.*" } }
如果您将在第5行中输入正确的命令，那么您将收到以下消息：使用包信息加载composer存储库安装依赖项（包括require-dev）。
创建index.php文件并在文件顶部加autoload.php。

例如，按照用于登录facebook的示例代码

session_start();

require_once('/home3/users/public_html/fbsdk/vendor/autoload.php');

use Facebook\FacebookSession;

use Facebook\FacebookRequest;

use Facebook\GraphUser;

use Facebook\FacebookRequestException;

use Facebook\FacebookRedirectLoginHelper;

FacebookSession::setDefaultApplication(YOUR APP_ID, YOUR SECRET_KEY);

$helper = new FacebookRedirectLoginHelper('http://example.com/fbsdk/login.php');

if(isset($_SESSION['access_token'])) {

    $access_token = $_SESSION['access_token'];

    $session = new FacebookSession($access_token);

} else {

    unset($_SESSION['access_token']);

    try {

        $session = $helper->getSessionFromRedirect();

        if($session)                    
            $_SESSION['access_token'] = $session->getToken();

    } catch(FacebookRequestException $ex) {

        // When Facebook returns an error

    } catch(Exception $ex) {

        // When validation fails or other local issues

    }

}

if ($session) {

    $request = new FacebookRequest($session, 'GET', '/me');
    $response = $request->execute();
    $graphObject = $response->getGraphObject();

    header('Location: ./home.php');

} else {

    $loginUrl = $helper->getLoginUrl();

    header('Location: ' . $loginUrl);

}

PHP facebook SDK 4.0登录错误

2 个答案: