Explain how to create custom 404 page in CodeIgniter?

You can create your custom 404 page with these steps. Please follow these steps one by one.

• You have to update your own created controller's class with $route['404_override'] = 'Controller_Class_Name';. You have to update this in your application/config/routes.php
• Please create your new controller "Controller_Class_Name" file in your controllers directory application/controllers/.
• Please put this code in your Controller_Class_Name.php
  
  class Controller_Class_Name extends CI_Controller {
       public function __construct() {
            parent::__construct();
       }
  
      public function index() {
           $this->output->set_status_header('404');
           $this->load->view('error_page_404');
      }
  }
• Now create your "error_page_404" view file.