使用php sdk在Facebook中获取访问令牌时出错 [英] Error to get the access token in facebook using php sdk

问题描述

我正在使用的代码:

$fb = new Facebook\Facebook([
  'app_id' => '{app-id}',
  'app_secret' => '{app-secret}',
  'default_graph_version' => 'v2.6',
  ]);

$helper = $fb->getCanvasHelper();

try {
  $accessToken = $helper->getAccessToken();
} 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;
}

if (! isset($accessToken)) {
  echo 'No OAuth data could be obtained from the signed request. A user has not authorized your app yet.';
  exit;
}

// Logged in
echo '<h3>Signed Request</h3>';
var_dump($helper->getSignedRequest());

echo '<h3>Access Token</h3>';
var_dump($accessToken->getValue());

输出: 这仅表明:无法从已签名的请求中获取OAuth数据.用户尚未授权您的应用

Output: This only shows that: No OAuth data could be obtained from the signed request. A user has not authorized your app yet

我正在使用页面的app_id and app_secret.

推荐答案

您正在使用的示例(...)涵盖了从应用画布(...)的上下文中获取访问令牌和签名请求的过程" . https://developers.facebook.com/docs/php/howto/example_access_token_from_canvas

The example you are using "(...) covers obtaining an access token and signed request FROM WITHIN THE CONTEXT OF AN APP CANVAS (...)". https://developers.facebook.com/docs/php/howto/example_access_token_from_canvas

应用画布的上下文意味着您的应用已嵌入Facebook(iframe)中. https://stackoverflow.com/a/41669757/2911960

Context of an app canvas means that your app is embeded on Facebook (iframe). https://stackoverflow.com/a/41669757/2911960

我假设您要在您的网站上使用该API.然后，您正在寻找: https://developers.facebook.com/docs/php/howto/example_facebook_login

I assume you want to use the API on your website. Then you are looking for this: https://developers.facebook.com/docs/php/howto/example_facebook_login

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