由于运费计算，添加到购物车速度很慢答案

【问题标题】：Add to cart is slow due to shipping cost calculation由于运费计算，添加到购物车速度很慢
【发布时间】：2023-01-09 14:23:58
【问题描述】：

由于 DHL 插件计算运费，添加到购物车速度很慢。我们在主题 function.php 中添加了以下代码行

/*
Remove recalculation of the shipping cost when Add-to-Cart. This prevents slow add-to-cart.
*/
function filter_need_shipping ($val) {
    $prevent_after_add = WC()->cart->prevent_recalc_on_add_to_cart;
    return $val && !$prevent_after_add;
}
add_filter( 'woocommerce_cart_needs_shipping', 'filter_need_shipping' );

function mark_cart_not_to_recalc ($cart_item_key, $product_id, $quantity, $variation_id, $variation, $cart_item_data) {
    WC()->cart->prevent_recalc_on_add_to_cart = true;
}
add_action('woocommerce_add_to_cart', 'mark_cart_not_to_recalc', 10, 6);

添加到购物车现在很快，但只要 WooCommerce 插件处于活动状态，以下磨损就会显示在仪表板中。

Warning: Attempt to read property "prevent_recalc_on_add_to_cart" on null in /home/website/public_html/wp-content/themes/woodmart-child/functions.php on line 568

您的帮助将不胜感激

【问题讨论】：

标签： php wordpress woocommerce hook-woocommerce

【解决方案1】：

function filter_need_shipping($val) {
    $prevent_after_add = (isset(WC()->cart->prevent_recalc_on_add_to_cart)) ? true : false;
    return $val && !$prevent_after_add;
}

add_filter('woocommerce_cart_needs_shipping', 'filter_need_shipping');

function mark_cart_not_to_recalc($cart_item_key, $product_id, $quantity, $variation_id, $variation, $cart_item_data) {
    WC()->cart->prevent_recalc_on_add_to_cart = true;
}

add_action('woocommerce_add_to_cart', 'mark_cart_not_to_recalc', 10, 6);

您需要检查设置了 prevent_recalc_on_add_to_cart 对象以禁用警告。在您将一件产品添加到购物车之前，它不会被设置。 woocommerce_cart_needs_shipping 钩子将在每个产品页面加载时触发

【讨论】：