How can i get codeigniter session database blob value? - codeigniter

Question

With Codeigniter session.
I have created the ci_session table.
In this table I save session datas in the blob datatype.
$sess_data= array(
'logged_in' => TRUE
);
$this->session->set_userdata($sess_data);
For count all online users, I need to get logged_in==1 value in blob datatype.
For example, user 1 is logged in with Chrome web browser. User2 is logged in with Mozilla. In the database there are 2 sessions with the different session id.
How can i get this all logged_in==1 values in this ci_session table?
This is my model function.
Please help me the fill where place in this function?
public function count_online_users(){
$this->db->select('*');
$this->db->from('ci_session');
$this->db->where(...........);
$query = $this->db->get()->num_rows();
return $query;
}

Answer 1

Check this this method you have to follow
First you have to update logged_in = 1 in your users table as your defined name
after you get number of users are logged_in
// Update user in to call this function
$data = array(
'logged_in' => '1'
);
public function update_user($user_id, $data)
{
$this->db->where('id',$user_id);
$this->db->update('users',$data);
}
// After you get logged in user in total value
public function count_online_users()
{
$this->db->select('*');
$this->db->from('users');
$this->db->where('logged_in','1');
$query = $this->db->get()->num_rows();
return $query;
}
You can use javascript and asynchron request for update field. When you close the window, the handler of window.onunload is called
var unloadHandler = function(e){
//here ajax request to close session
};
window.unload = unloadHandler;
To solve the problem of redirection, php side you can use a counter
class someController extends Controller {
public function methodWithRedirection(){
$this->session->set_userdata('isRedirection', 1);
//here you can redirect
}
}
class homeController extends Controller{
public function closeConnection(){
$this->load->library('session');
if($this->session->userdata('isRedirection')!== 1){
//destroy session
}
}
}