問題描述

我希望為特定的可變產品設置特定折扣，如果客戶購買一種產品，他們會以 50% 的折扣獲得另一種(相同的)(買一個 50% 的折扣).我試過很多折扣插件，我發現最接近的是:

I wish to set up a specific discount on a particular variable products, if customer buys one product they get the another(same) on 50% discount(Buy one get another for 50% off). I've tried many discount plugins buy the closest that I have found are:

• WooCommerce 的定價交易

• Pricing Deals for WooCommerce

WooCommerce 所有折扣精簡版

WooCommerce All Discounts Lite

通過使用這些插件，我可以為每個產品設置小計折扣或折扣，但不完全是我想要的(買 1 送 1).還有其他專業插件我不想去.

By using these plugins I was able to setup discount on subtotal or discount on a each product but not exactly what I am looking for(Buy 1 get 1 off). There are other pro plugins I don't want to go for it.

不買插件可以實現嗎?

謝謝

發現類似的東西https://www.fldtrace.com/buy-3-get-1-free-coupon-woocommerce

推薦答案

更新 (與你的評論有關)

此版本將在此定義的可變產品的購物車中的所有產品變體上全局運行:

This version will work globally on all product variations in the cart for this defined variable product:

add_action('woocommerce_cart_calculate_fees', 'add_custom_discount_2nd_at_50', 10, 1 );
function add_custom_discount_2nd_at_50( $wc_cart ){
    if ( is_admin() && ! defined( 'DOING_AJAX' ) ) return;
    $discount = 0;
    $items_prices = array();

    // Set HERE your targeted variable product ID
    $targeted_product_id = 40;

    foreach ( $wc_cart->get_cart() as $key => $cart_item ) {
        if( $cart_item['product_id'] == $targeted_product_id ){
            $qty = intval( $cart_item['quantity'] );
            for( $i = 0; $i < $qty; $i++ )
                $items_prices[] = floatval( $cart_item['data']->get_price());
        }
    }
    $count_items_prices = count($items_prices);
    if( $count_items_prices > 1 ) foreach( $items_prices as $key => $price )
        if( $key % 2 == 1 ) $discount -= number_format($price / 2, 2 );

    if( $discount != 0 ){
        // Displaying a custom notice (optional)
        wc_clear_notices();
        wc_add_notice( __("You get 50% of discount on the 2nd item"), 'notice');

        // The discount
        $wc_cart->add_fee( 'Discount 2nd at 50%', $discount, true  );
        # Note: Last argument in add_fee() method is related to applying the tax or not to the discount (true or false)
    }
}

代碼位于活動子主題(或主題)的 function.php 文件或任何插件文件中.

此代碼已在 Woocommerce 3+ 上進行測試并有效.

This code is tested on Woocommerce 3+ and works.

原答案:

有多種方法可以為特定可變產品 ID 的第二件商品添加 50% 的自定義折扣.下面我使用 add_fee() 方法和一個負值 (所以它增加了折扣).
可選擇顯示自定義通知:

There is many ways to do add a custom discount of 50% on the 2nd item for a specific variable product ID. Below I am using add_fee() method with a negative value (so it adds a discount).
Optionally it will display a custom notice:

add_action('woocommerce_cart_calculate_fees', 'add_custom_discount_2nd_at_50', 10, 1 );
function add_custom_discount_2nd_at_50( $wc_cart ){
    if ( is_admin() && ! defined( 'DOING_AJAX' ) ) return;
    $discount = 0;

    // Set HERE your targeted variable product ID
    $targeted_product_id = 40;

    foreach ( $wc_cart->get_cart() as $key => $cart_item ) {
        if( $cart_item['product_id'] == $targeted_product_id ){
            $price = $cart_item['data']->get_price();
            $quantity = intval( $cart_item['quantity'] );
            for( $i = 1, $j = 0; $i <= $quantity; $i++ ){
                if( $i % 2 == 0 &&  $quantity > 1 ) $j++;
            }
            if( $quantity > 1 ) number_format($discount -= $price * $j / 2, 2 );
        }
    }
    if( $discount != 0 ){
        // Displaying a custom notice (optional)
        wc_clear_notices();
        wc_add_notice( __("You get 50% of discount on the 2nd item"), 'notice');
        
        $wc_cart->add_fee( 'Discount 2nd at 50%', $discount, true  );
        # Note: Last argument in add_fee() method is related to applying the tax or not to the discount (true or false)
    }
}

代碼位于活動子主題(或主題)的 function.php 文件或任何插件文件中.

此代碼已在 Woocommerce 3+ 上進行測試并有效.

This code is tested on Woocommerce 3+ and works.

相關:WooCommerce折扣:買一送一 50% 折扣

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