FB SDK4 帖子附件请求失败消息 (803）

$fburl = "/XXXXXXXXXX/posts?fields=$fields&limit=25$nav";
echo "FBURL: $fburl<br />";
$request = new FacebookRequest( $session, 'GET', "$fburl");
$response = $request->execute();
$FBdata = json_decode($response->getRawResponse());
$fbatturl = urlencode("/$postid?fields=attachments");
echo "FBATTURL: $fbatturl<br />";
$request = new FacebookRequest( $session, 'GET', "$fbatturl");
$response = $request->execute();
$FBattdata = json_decode($response->getRawResponse());

我被困在这里。在网页中，第一个 fburl 组遍历了 25 个帖子，但我无法调用每个帖子的附件来运行。错误是：

Fatal error: Uncaught exception 'Facebook'FacebookAuthorizationException' with message '(#803) 
Some of the aliases you requested do not exist: aaaaa...aaaaa_aaaaaaaaa..aaa?fields=attachments'
 in C:'wwwroot'....php-sdk4'FacebookRequestException.php:134 Stack trace: #0 
  C:'wwwroot'.,..php-sdk4'FacebookRequest.php(268): 
  Facebook'FacebookRequestException::create('{"error":{"mess...', Object(stdClass), 404) #1 C:'wwwroot'.....php(386): Facebook'FacebookRequest->execute() #2 {main} thrown in C:'wwwroot'....'php-sdk4'FacebookRequestException.php on line 134

错误消息中回显的"FBatturl"在图形资源管理器 (2.1( 中工作。

按照这个例子 Facebook PHP SDK4 - FQL 请求 我已经尝试过...

$params = urlencode("SELECT attachment FROM stream WHERE source_id=$StatusID[0] AND      post_id='"$postid'"");
$request = new FacebookRequest( $session, 'GET', $params );
$response = $request->execute();
$FBattdata = json_decode($response->getRawResponse());

并收到相同的错误，我假设附件已失效。他们变得非常成问题。

从这里到哪里去？应该可以从帖子链接中获取照片吗？我是否读到新 SDK 中会有带有帖子的照片？