codeigniter_tutorial

CodeIgniter
Remove Session Data
In PHP, we can remove data stored in session using the unset() function as shown
below.
unset($_SESSION[‘some_name’]);
Removing session data in CodeIgniter is very simple as shown below. The below version
of unset_userdata() function will remove only one variable from session.
$this->session->unset_userdata('some_name');
If you want to remove more values from session or to remove an entire array you can
use the below version of unset_userdata() function.
$this->session->unset_userdata($array_items);
Fetch Session Data
After setting data in session, we can also retrieve that data as shown below. Userdata()
function will be used for this purpose. This function will return NULL if the data you are
trying to access is not available.
$name=$this->session->userdata('name');
Example
Create a controller class called Session_controller.php and save it in
application/controller/Session_controller.php.