WC_Product::set_stock_status PHP Метод

    public function set_stock_status($status = '')
    {
        $this->set_prop('stock_status', 'outofstock' === $status ? 'outofstock' : 'instock');
    }

 /**
  * Sync variable product stock status with children.
  * Change does not persist unless saved by caller.
  *
  * @since 2.7.0
  * @param WC_Product|int $product
  */
 public function sync_stock_status(&$product)
 {
     $product->set_stock_status($product->child_is_in_stock() ? 'instock' : 'outofstock');
 }