facebook-php-sdk登录图返回一个错误

Question

login.php码

if(!session_id()) {
    session_start();
}

require_once __DIR__ . '/vendor/autoload.php';

$facebook_appId = '123';
$facebook_appSecret = '123';

$fb = new Facebook\Facebook([
  'app_id' => $facebook_appId,
  'app_secret' => $facebook_appSecret,
  'default_graph_version' => 'v2.11',
]);

$helper = $fb->getRedirectLoginHelper();

$permissions = ['email']; // Optional permissions
$loginUrl = $helper->getLoginUrl('http://www.123.com/login-callback.php', $permissions);

echo '<a href="' . htmlspecialchars($loginUrl) . '">Login via Facebook!</a>';

登录-callback.php代码

    if(!session_id()) {
    session_start();
}

require_once __DIR__ . '/vendor/autoload.php';

$facebook_appId = '123';
$facebook_appSecret = '123';

$fb = new \Facebook\Facebook([
    'app_id' => $facebook_appId,
    'app_secret' => $facebook_appSecret,
    'default_graph_version' => 'v2.11',
]);

// Use one of the helper classes to get a Facebook\Authentication\AccessToken entity.
//   $helper = $fb->getRedirectLoginHelper();
//   $helper = $fb->getJavaScriptHelper();
//   $helper = $fb->getCanvasHelper();
//   $helper = $fb->getPageTabHelper();

try {
  // Get the \Facebook\GraphNodes\GraphUser object for the current user.
  // If you provided a 'default_access_token', the '{access-token}' is optional.

  $helper = $fb->getRedirectLoginHelper();  
  $accessToken = $helper->getAccessToken();
  $response = $fb->get('/me?fields=id,name', $accessToken );
  // $response = $fb->get('/me', $accessToken );

} 
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();

当我单击"login.php“输出链接时，它会跳转到”log-callback.php“，并打印以下错误消息。我该如何解决这个问题？

图形返回一个错误:无法加载URL:此URL的域名不包含应用程序的域名。为了能够加载URL，在应用程序设置的application字段中添加应用程序的所有域和子域。

但是，我在facebook开发平台中添加了相应的url。

Answer 1

现在，在严格模式下，OAuth对于FB是强制性的:您必须在应用程序设置板中的FB参数中设置回调脚本的URI，并传递与getAccessToken()方法的参数相同的回调URL：

try {
  $accessToken = $helper->getAccessToken('http://yourdomain.com/login-callback.php');
}// ...