Displaying random products in OpenCart promotions?

Question

opencart

Hello! Please tell me how to make on the promotions (special) page in OpenCart 3 so that the products are constantly random when the page is reloaded. In random order.
I have done this in categories and it works:

$filter_data = array(
        'filter_category_id' => $category_id,
        'filter_filter'      => $filter,
        'sort'               => $sort,
        'order'              => $order,
        'start'              => ($page - 1) * $limit,
        'limit'              => $limit * 10
      );

      $product_total = $this->model_catalog_product->getTotalProducts($filter_data);

      $results = $this->model_catalog_product->getProducts($filter_data);
      srand((float)microtime() * 1000000);
      shuffle($results); 
      $results = array_slice($results, 0, $limit);

In special, I found a piece of code, I think that it is responsible for output and sorting. Please tell me how to make the goods random

$data['results'] = sprintf($this->language->get('text_pagination'), ($product_total) ? (($page - 1) * $limit) + 1 : 0, ((($page - 1) * $limit) > ($product_total - $limit)) ? $product_total : ((($page - 1) * $limit) + $limit), $product_total, ceil($product_total / $limit));