WooCommerce 购物车仅对常规商品的第二个商品提供折扣

Question

我在 Whosebug 上找到了这段代码，它满足了我的需要，除了我需要在购物车中添加 2 个产品后立即为每个产品应用 -5 欧元的折扣。

示例：

对于购物车中的 1 件产品，用户将获得 0 欧元的折扣
对于购物车中的 2 个产品，用户将获得 5 欧元的折扣
对于购物车中的 3 件产品，用户将获得 10 欧元的折扣
对于购物车中的 4 件产品，用户将获得 15 欧元的折扣
对于购物车中的 5 件产品，用户将获得 20 欧元的折扣

等等...

add_action('woocommerce_cart_calculate_fees' , 'custom_discount', 10, 1);
function custom_discount( $cart ){
    if ( is_admin() && ! defined( 'DOING_AJAX' ) && ! is_user_logged_in() )
    // if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;
    // Only when there is 2 or more items in cart
    if( $cart->get_cart_contents_count() >= 2):

        // Initialising variable
        $is_on_sale = false;

        // Iterating through each item in cart
        foreach( $cart->get_cart() as $cart_item ){
            // Getting an instance of the product object
            $product =  $cart_item['data'];

            // If a cart item is on sale, $is_on_sale is true and we stop the loop
            if($product->is_on_sale()){
                $is_on_sale = true;
                break;
            }
        }

        ## Discount calculation ##
        // fixed reduction price
        $reduction = 5;


        ## Applied discount (no products on sale) ##
        if(!$is_on_sale )
            $cart->add_fee( '-5€ à partir du 2ème article commandé', -$reduction);

    endif;
}

感谢任何帮助。

Answer 1

你们真亲密。您知道购物车 $cart->get_cart_contents_count() 中的商品数量，并且希望在第一个产品之后开始打折。

替换$reduction = 5;

用这个$reduction = 5*($cart->get_cart_contents_count() - 1);

您的完整代码应如下所示：

add_action('woocommerce_cart_calculate_fees' , 'custom_discount', 10, 1);
function custom_discount( $cart ){
    if ( is_admin() && ! defined( 'DOING_AJAX' ) && ! is_user_logged_in() )
    // if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;
    // Only when there is 2 or more items in cart
    if( $cart->get_cart_contents_count() >= 2):

        // Initialising variable
        $is_on_sale = false;

        // Iterating through each item in cart
        foreach( $cart->get_cart() as $cart_item ){
            // Getting an instance of the product object
            $product =  $cart_item['data'];

            // If a cart item is on sale, $is_on_sale is true and we stop the loop
            if($product->is_on_sale()){
                $is_on_sale = true;
                break;
            }
        }

        ## Discount calculation ##
        // fixed reduction price
        $reduction = 5*($cart->get_cart_contents_count() - 1);


        ## Applied discount (no products on sale) ##
        if(!$is_on_sale )
            $cart->add_fee( '-5€ à partir du 2ème article commandé', -$reduction);

    endif;
}

Answer 2

您最好使用以下仅计算常规商品（而不是“打折”商品）并根据从第二个商品开始的特定数量应用折扣的商品：

add_action('woocommerce_cart_calculate_fees' , 'progressive_fixed_discount', 10, 1);
function progressive_fixed_discount( $cart ){
    if ( is_admin() && ! defined( 'DOING_AJAX' ) && ! is_user_logged_in() )
    // if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

    // Initialising variable
    $regular_items_count = -1;

    // Iterating through each item in cart
    foreach( $cart->get_cart() as $cart_item ){

        // Count only on regular items (not "on sale" items)
        if( ! $cart_item['data']->is_on_sale() ){
            $regular_items_count += $cart_item['quantity'];
        }
    }
    
    // Only for regular items starting on the 2nd item (not "on sale" items)
    if ( $regular_items_count > 0 ) {

        // Progressive fixed discount calculation on regular items only
        $discount = 5 * $regular_items_count;


        // Apply a discount for "on sale" items only 
        $cart->add_fee( __("-5€ à partir du 2ème article commandé", "woocommerce"), -$discount );
    }
}

代码进入您的活动子主题（或活动主题）的 functions.php 文件。已测试并有效。

一些相关的similar answers threads:

Custom discount for every NTH item in the cart
WooCommerce: Add a discount based on individual items quantity

添加 - 排除产品类别：

Replace:

if( ! $cart_item['data']->is_on_sale() ){

with:

if( ! $cart_item['data']->is_on_sale() && ! has_term( array( 5537 ), 'product_cat', $cart_item['product_id'] ) ) {

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