| Аргумент | Возможный тип | Описание |
| $product_id | — | — |
$product_category_data = array();
$query = $this->db->query("SELECT * FROM " . DB_PREFIX . "product_to_category WHERE product_id = '" . (int)$product_id . "'");
foreach ($query->rows as $result) {
$product_category_data[] = $result['category_id'];
}
return $product_category_data;