cakephp - Session, PHP Incomplete Class

Question

I am using cakePHP 2.x . Currently doing about the twitter OAuth, http://code.42dh.com/oauth/.

function twitter_authentication()
{
            //assume above coding is all correct.   
    $this->Session->write('twitter_request_token', ($requestToken));
    $this->redirect('http://api.twitter.com/oauth/authenticate?force_login=true&oauth_token='.$requestToken->key); //I able to get $requestToken.
}

function twitter_login()
{
        $requestToken = $this->Session->read('twitter_request_token');
        $accessToken = $this->OAuthConsumer->getAccessToken('Twitter','https://api.twitter.com/oauth/access_token', $requestToken);

At function_login(), I failed to read session and ended up with PhP Incomplete Class. If I do $this->Session->write('twitter_request_token', serialize($requestToken)); and $requestToken = $this->Session->read(unserialize('twitter_request_token'); it will work, but I will ended up error at other places which caused by using serialize and unserialize session.

Answer 1

"PHP Incomplete Class" means PHP doesn't have a class definition for the object you're loading.

Option A: figure out what class that object is when you write it into the session and ensure that class's definition is loaded before loading the object.

Option B: convert the object to an stdClass or array before writing it, and convert back after loading. This might be more complex than the first option.