fb post example

require_once('lib/fb/facebook.php');

  $config = array(
    'appId' => 'XXX',
    'secret' => 'XXX',
  );

  $facebook = new Facebook($config);
  $user_id=$facebook->getUser();

    if($user_id) {

      // We have a user ID, so probably a logged in user.
      // If not, we'll get an exception, which we handle below.
      try {
        $ret_obj = $facebook->api('/me/feed', 'POST',
                                    array(
                                      'link' => $link,
                                      'message' => $title
                                 ));
        $output.= 'Article successfully submitted to Facebook!<br/> Post ID: ' . $ret_obj['id'];

      } catch(FacebookApiException $e) {
        // If the user is logged out, you can have a
        // user ID even though the access token is invalid.
        // In this case, we'll get an exception, so we'll
        // just ask the user to login again here.
        $login_url = $facebook->getLoginUrl( array(
                       'scope' => 'publish_stream'
                       ));
        $output.= 'Please <a href="' . $login_url . '">login.</a>';
        error_log($e->getType());
        error_log($e->getMessage());
      }
      // Give the user a logout link
      //echo '<br /><a href="' . $facebook->getLogoutUrl() . '">logout</a>';
    } else {

      // No user, so print a link for the user to login
      // To post to a user's wall, we need publish_stream permission
      // We'll use the current URL as the redirect_uri, so we don't
      // need to specify it here.
      $login_url = $facebook->getLoginUrl( array( 'scope' => 'publish_stream' ) );
      $output.= 'Please <a href="' . $login_url . '">login.</a>';

    }


}
else {$output.= "An error has occurred";}

echo $output;