wordpress - 按顺序重新计算 woocommerce 费用

Question

我正在尝试创建一个函数，该函数将删除订单中添加的任何旧费用，并根据订单项目添加新费用。我已经创建了给定的函数

public function order_recalculate_taxes( $order_id ) {

    global $woocommerce;

    $order      = wc_get_order( $order_id );

    // Iterating through order fee items ONLY
    foreach( $order->get_items('fee') as $item_id => $item_fee ){
        $order->remove_item($item_id);
    }

    // calculate the new fee according to booking id
    // this is a custom function which generates the 
    // output code give below

    $fees = $this->woocommerce_get_fee( $booking_id );
    // output: array(1) { [0]=> array(2) { ["name"]=> string(3) "VAT" ["total"]=> float(48.8) } }

    foreach ($fees as $fee) {
        $order->add_fee( $fee['name'], $fee['total'], true, '' );
    }
}

谁能帮我解决这个问题？