Get latest Facebook posts of page with PHP SDK

Question

The following code is inside a file called facebook_posts.php which I call from my index file like so:

Answer 1

You need to use a long-lived page access-token.

Page Access Token

These access tokens are similar to user access tokens, except that they provide permission to APIs that read, write or modify the data belonging to a Facebook Page. To obtain a page access token you need to start by obtaining a user access token and asking for the manage_pages permission. Once you have the user access token you then get the page access token via the Graph API.

As @CBroe said, you should not use that access token in client-side code as it is secret/private and you don't want anyone to get it.

So for what you want to do, Javascript is not the right choice. You will have to use some server-side code, like PHP, Python or Ruby to get the posts. If that is clear, here is how you can create it.

---

1. Create a Facebook app:

   • keep the app id (1) and app secret (2) aside,
   • in the "advanced" settings, activate OAuth in order to avoid The application has disabled OAuth client flow.

2. You need to create a user access token.

   • go on the Graph API Explorer and select the application you just created,
   • generate an access token: click "Get access token" and tick manage_pages in the "Extended Permissions" tab.

3. Get your short-lived page access token.

   • still in the Graph API explorer, query me/accounts (GET),
   • find your page and get its access token (3).

4. Get your long-lived page access token.

   • in your browser, paste https://graph.facebook.com/oauth/access_token?client_id=(1)&client_secret=(2)&grant_type=fb_exchange_token&fb_exchange_token=(3) in the address bar,
   • replace (1), (2) and (3) by your app id, your app secret and your page access token,
   • get your new long-lived access token from the result: access_token=FAKECAALBygJ4juoBAJyb8Cbq9bvwPYQwIaX53fLTMAWZCmDan1netI30khjITZAqcw9uE0lRT4ayWGm2ZCS7s7aZCVhF3ei6m0fuy2AkTkwmzUiJI4NUOZAyZAzuL,
   • use the Access Token Debugger to verify that your access token will never expire.

---

Now you can use that new access token to retrieve the posts of your page:

$session = new FacebookSession('FAKECAALBygJ4juoBAJyb8Cbq9bvwPYQwIaX53fLTMAWZCmDan1netI30khjITZAqcw9uE0lRT4ayWGm2ZCS7s7aZCVhF3ei6m0fuy2AkTkwmzUiJI4NUOZAyZAzuL');

try {
    $data = (new FacebookRequest(
        $session, 'GET', '/me/posts'
    ))->execute()->getGraphObject()->getPropertyAsArray("data");

    foreach ($data as $post){
        $postId = $post->getProperty('id');
        $postMessage = $post->getProperty('message');
        print "$postId - $postMessage 
";
    }
} catch (FacebookRequestException $e) {
    // The Graph API returned an error
} catch (\Exception $e) {
    // Some other error occurred
}