public function productPage()
 {
     if (isset($_GET['productId']) && $_GET['productId'] > 0) {
         require $this->path . 'database/product.php';
         $product = new Product($this->path);
         $itemMass = $product->getOne($_GET['productId']);
         if (!is_array($itemMass)) {
             header('Location: /error.html', true, 301);
         } else {
             require $this->path . 'views/bigPage.php';
         }
     }
 }