How to create a custom page programmatically in Drupal 8

Create a custom page with custom controller at /hello that displays a title of ‘Create a custom page in drupal 8!’ and the following content: ‘Welcome to codimth.com !’

Add the following code to the codimth_controller.info.yml file:

name: CodimTh Controller
description: Create a custom page in drupal 8
package: CodimTh
type: module
core: 8.x

Add the following code to the codimth_controller.routing.yml file:

codimth.content:
  path: '/hello'
  defaults:
    _controller: '\Drupal\codimth_controller\Controller\CodimthController::index'
    _title: 'Create a custom page in drupal 8!'
  requirements:
    _permission: 'access content'

Add the following code to the codimth_controller/src/Controller/CodimthController.php file:

<?php
namespace Drupal\codimth_controller\Controller;
use Drupal\Core\Controller\ControllerBase;

class CodimthController extends ControllerBase
{
    public function index()
    {
        return array(
            '#type' => 'markup',
            '#markup' => $this->t('Welcome to codimth.com !'),);
    }
}

Now clear your Drupal 8 caches. and you should be able to see the new page.

I hope you found this article useful. let me know if you have any questions and I’ll be happy to answer them.