gistfile1.txt

<?php
namespace Drupal\products\Controller;

use Drupal\Core\Controller\ControllerBase;
use Drupal\products\products;
use Drupal\Core\Render\Markup;

/**
 * Provides route responses for the products module.
 */
class ProductsController extends ControllerBase {
  protected $prod;

  public function __construct() {
    $this->prod = new products;
  }


  /**
   * Returns a info page listing all products.
   *
   * @return array
   *   A simple renderable array.
   */
  public function listProducts() {
    $this->products = $this->prod->getProducts();
    if ($this->products->statusCode != 200) {
      // error
      $output = '> no product found';
    }
    else {
      $output = '<h2>List of Registered Products</h2>';
      $rows = [
        [Markup::create('<strong>test 1</strong>'),'test'],
        [Markup::create('<s>test 2</s>'), 'test'],
        [Markup::create('<div>test 3</div>'), 'test'],
      ];
      $header = [
        'title' => t('Title'),
        'content' => t('Content'),
      ];
      $build['table'] = [
        '#type' => 'table',
        '#header' => $header,
        '#rows' => $rows,
        '#empty' => t('No content has been found.'),
      ];

      $output .= render($build);
    }
      $element = array(
        '#markup' => $build,
      );

    return $build;
  }
}