Unable to auto post on a Facebook Page using its PHP SDK

Question

I have read at many places that Facebook made some changes around 2018 that prevent people from posting as a page with PHP. I researched for a while to see if I can still auto post on a Facebook page if I am its Admin.

My sources: Facebook Graph API v3.1 Access Token Permission Limitations For Developers and https://adamboother.com/blog/automatically-posting-to-a-facebook-page-using-the-facebook-sdk-v5-for-php-facebook-api/

I am the only one who will use this auto-post app and I am the admin of the page on which I will be posting these links.

Here is the code I tried:

$fb = new Facebook\Facebook([
    'app_id' => 'app_id',
    'app_secret' => 'app_secret',
    'default_graph_version' => 'v2.2',
]);

$pageAccessToken = "page_access_token";


$linkData = [
    'link' => 'some_link',
    'message' => 'some_message'
];
try {
    $response = $fb->post('/me/feed', $linkData, $pageAccessToken);
} catch(Facebook\Exceptions\FacebookResponseException $e) {
    echo 'Graph returned an error: '.$e->getMessage();
    exit;
} catch(Facebook\Exceptions\FacebookSDKException $e) {
    echo 'Facebook SDK returned an error: '.$e->getMessage();
    exit;
}
$graphNode = $response->getGraphNode();

Running the above code, I get the following error:

Graph returned an error: (#200) If posting to a group, requires app being installed in the group, and \\ either publish_to_groups permission with user token, or both manage_pages \\ and publish_pages permission with page token; If posting to a page, \\ requires both manage_pages and publish_pages as an admin with \\ sufficient administrative permission.

Now, I am an admin of the page. I also have selected manage_pages and publish_pages in permissions. So, why am I getting this error?

Answer 1

According to the documentation here , you can not publish posts by using the feed edge anymore. This documentation discusses editing and deleting the posts, it also says we can not create new posts.

Answer 2

On May 5, 2020, Facebook released six new Page permissions to replace the manage_pages and publish_pages permissions. Taking advantage of curl, you can use php to create and update a post or comment, reply to a post or comment, and delete a post or comment, on your Facebook Page Feed as the Page.

• Send a POST request to the /{page-id}/feed endpoint:

  curl -i -X POST " https://graph.facebook.com/ {page-id}/feed ?message=Hello Fans! &access_token={page-access-token}"

• On success, your app receives the following response:

  { "id": "{page-post-id}" }

source: https://developers.facebook.com/docs/pages/publishing/

Answer 3

You are most likely not using a Page Token, but a User Token. It still works, but you must use a Page Token to post to a Page.