cakephp/tests/test_app/TestApp/Controller/ThemePostsController.php

<?php
declare(strict_types=1);

/**
 * CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
 * @link          https://cakephp.org CakePHP(tm) Project
 * @since         3.0.0
 * @license       https://opensource.org/licenses/mit-license.php MIT License
 */
namespace TestApp\Controller;

use Cake\Controller\Controller;

class ThemePostsController extends Controller
{
    /**
     * index method
     *
     * @return void
     */
    public function index()
    {
        $this->set('testData', 'Some test data');
        $test2 = 'more data';
        $test3 = 'even more data';
        $this->set(compact('test2', 'test3'));
    }
}