CodeIgniter adding session variable to an already defined "named session"
You do as follows in your index() method:
$session_data = $this->session->userdata('verified');$session_data['book_id'] = "something";$this->session->set_userdata("verified", $session_data);This way you retrieve the contents of the variable (i.e. the array that you persisted earlier), you add another key to the array (book_id), and then store it again. Now you will be able to do, as I assume you want to:
$sess = $this->session->userdata("verified");echo $sess['book_id'];