// revocation failed
         echo "Error revoking user's token:<br /><br />RESPONSE:<br /><br /><pre>" . print_r($response, TRUE) . "</pre><br /><br />LINKEDIN OBJ:<br /><br /><pre>" . print_r($OBJ_linkedin, TRUE) . "</pre>";
     }
     break;
 case 'createPost':
     /**
      * Handle create post requests.
      */
     // check the session
     if (!oauth_session_exists()) {
         throw new LinkedInException('This script requires session support, which doesn\'t appear to be working correctly.');
     }
     $OBJ_linkedin = new LinkedIn($API_CONFIG);
     $OBJ_linkedin->setTokenAccess($_SESSION['oauth']['linkedin']['access']);
     if (!empty($_POST['title'])) {
         $response = $OBJ_linkedin->createPost(DEMO_GROUP, $_POST['title'], empty($_POST['summary']) ? '' : $_POST['summary']);
         if ($response['success'] === TRUE) {
             header('Location: ' . $_SERVER['PHP_SELF']);
         } else {
             echo "Error creating post: <br /><br />RESPONSE:<br /><br /><pre>" . print_r($response, TRUE) . "</pre>";
         }
     } else {
         echo "Error creating post: The title must be specified.";
     }
     break;
 case 'deletePost':
     /**
      * Handle delete post requests.
      */
     // check the session
     if (!oauth_session_exists()) {