How to create a custom 404 page in Codeigniter

In this tutorial we will be learning how to create a custom '404 page' or 'Page not found' in Codeigniter. Here we will redirect 404 page to existing page in the following steps. You can create a custom page instead of redirecting to existing one.

1. Go to "application/config/routes.php"

Now search for $route['404_override'] = ' '; Replace it with the following piece of code.

$route['404_override'] = 'Custom404';

2. Now create a new controller "Custom404.php" with the following code.

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Custom404 extends CI_Controller {

public function __construct() {

    parent::__construct();

    // load base_url
    $this->load->helper('url');
}

public function index(){

    $this->output->set_status_header('404');
    $this->load->view('errorPage');

}

}
?>

3. Now create a new view for 404 page name by "errorPage" with your styling.

Alternatively you can redirect the same to existing page by replacing "errorPage" with "existingPage".