如何将Add to Cart Woocommerce按钮更改为包含产品SKU和Quantity#的自定义URL

// 添加自定义字段到产品页面
add_action('woocommerce_before_add_to_cart_button', 'custom_add_to_cart_url');
function custom_add_to_cart_url() {
    global $product;
    $sku = $product->get_sku();
    ?>
    <form action="<?php echo esc_url(home_url('/')); ?>" method="get">
        <input type="hidden" name="add-to-cart" value="<?php echo esc_attr($product->get_id()); ?>">
        <input type="hidden" name="quantity" value="1"> <!-- 默认数量 -->
        <input type="hidden" name="sku" value="<?php echo esc_attr($sku); ?>">
        <button type="submit">Add to Cart</button>
    </form>
    <?php
}

// 处理自定义 URL 请求
add_filter('woocommerce_add_to_cart_redirect', 'custom_add_to_cart_redirect');
function custom_add_to_cart_redirect($url) {
    if (isset($_GET['sku']) && isset($_GET['quantity'])) {
        $product_id = apply_filters('woocommerce_add_to_cart_product_id', absint($_GET['add-to-cart']));
        $quantity = apply_filters('woocommerce_add_to_cart_quantity', absint($_GET['quantity']), $product_id);
        WC()->cart->add_to_cart($product_id, $quantity);
        return wc_get_cart_url();
    }
    return $url;
}