Storing Array Data in CI Session

[eluser]warrennz[/eluser]
Im not 100% on this but one of the DB Session handlers I used to use allowed you to do

Code:

$ar = array('user_id'=>900,
            'username'=>'John Doe');

$this->session->set_userdata('user_details',$ar);


$this->session->userdata('user_details','user_id'); //Return 900;

Is that the sorta thing you're after?