获取购物车中物品的ID可以这样做：

global $woocommerce;
$cart = $woocommerce->cart->get_cart();
$cart_items_ids = array();
foreach ( $cart as $item_key => $item_value ) {
    $cart_items_ids[] = $item_value[ \'data\' ]->id;
}

或者请检查下面的代码片段：检查购物车中是否有产品类别–WooCommerce

add_action(\'woocommerce_before_cart\', \'xyz_check_category_in_cart\');

function xyz_check_category_in_cart() {
    // Set $cat_in_cart to false
    $cat_in_cart = false;

    // Loop through all products in the Cart        
    foreach ( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
        $product = $cart_item[\'data\'];

        // If Cart has category "download", set $cat_in_cart to true
        if ( has_term( \'download\', \'product_cat\', $product->get_id() ) ) {
            $cat_in_cart = true;
            break;
        }
    }

    // Do something if category "download" is in the Cart      
    if ( $cat_in_cart ) {

        // For example, print a notice
        wc_print_notice( \'Category Downloads is in the Cart!\', \'notice\' );

        // Or maybe run your own function...
    }
}

您可以将PHP代码片段放在子主题函数的底部。php文件（如果有的话，请在“？>”之前）。

如果一切按预期进行，请在评论中告诉我。

非常感谢。