Facebook Graph Api - Posting to page without logging - php

Question

I'm trying to create a script that post status updates on facebook pages without logging-in the user. I've got access_token for my application and for the pages as the user granted the application once; but I always get the error
Fatal error: Uncaught OAuthException: (#200) The user hasn't authorized the application to perform this action
despite I've granted manage_pages and publish_stream permission.
Also if I use the access_token for the page I get the error
Fatal error: Uncaught OAuthException: Error validating access token: The session is invalid because the user logged out.
Here is the code I use.
$facebook = new Facebook(array(
'appId' => 'XXX',
'secret' => 'XXXXXXXXXXX'
));
$post = array(
'message' => 'Message to user'/*,
access_token = "XXXXXXXX"*/
);
$feed = '/[PAGE_ID]/feed';
$post_id = $facebook->api($feed, "post", $post);
Thanks.
Edit :
I finally managed to post status updates on a user's page while this user was disconnected, I had to generate the access_token through the server-side auth method.

Answer 1

Below is a small code smaple on how to do a FB post to a page:
yOU NEED:
Your_authToken_for_User
List item
saved_fb_Page_Token
$facebook = $facebook = new Facebook(array(
'appId' => $fbAppId,
'secret' => $fbAppSecret,
'cookie' => true,
));
$facebook->setAccessToken("Your_authToken_for_User");
//Now your FB instance is authenticated.
$pages= $facebook->api('/me/accounts'); //use the current authenticated FB instance to grab Pages. If you already know your page ID , skip this.
//Assuming you have a pageid in $page_id,(the $page_id can be grabbed from the $pages array).
$attachment = array(
'access_token' => $saved_fb_Page_Token,
'message' => "foo",
'name' => "Bar",
'link' => "http://foo.bar",
'description' => "barfoo",
'picture' => "an image url here",
);
$facebook->api('/' . $page_id . '/feed', 'POST', $attachment);//post to fb page