Authentication

Loading Your Auth library for Every Controller

go to codeigniter/application/libraries/ create or replace your library files here.

go to codeigniter/application/core/ create a new php file named like MY_Controller.php

inside MY_Controller.php

<?php 
class MY_Controller extends CI_Controller{
    public function __construct(){
        parent::__construct();
        $this->load->library('AuthLib'); // AuthLib is your library name
    }
}

And then on every controller file you need to extends MY_Controller.

Example of a controller; go to codeigniter/application/controllers and create a php file

<?php 
    class Profile extends MY_Controller{
        public function __construct(){
            parent::__construct();
            if ($this->AuthLib->logged_in() === FALSE) { //if you wanna make this condition stament on every controller just  write it to inside construct function in MY_Controller.php 
                redirect(base_url('/'));
            }
        }
    }