Facebook使用PHP API发布到页面页面？

我正在尝试设置一个脚本来自动发布一个信息到Facebook页面，我是管理员。我有下面的代码，但目前，而不是作为页面管理员发布到页面的墙上，该帖子将从我的个人帐户的页面的访客帖子部分。关于我如何解决这个问题的任何想法？

I am trying to set up a script to automatically post a message to a Facebook page I am admin of. I have the code below but currently, instead of posting to the page's wall as the page admin, the post is going to the "visitor posts" section of the page from my personal account. Any ideas on how I can resolve this?

require_once('Facebook/autoload.php');

$fb = new Facebook\Facebook([
  'app_id' => 'myappid',
  'app_secret' => 'myappsecret',
  'default_graph_version' => 'v2.5',
]);

$pageID = 'mypageid';
$accessToken = 'myaccesstoken';

try {
  $publish = $fb->post('/' . $pageID . '/feed', 
     array(
       'access_token' => $accessToken,
       'message' => $status,
       'to' => $pageID
       )
   );
} 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;
}