针对WooCommerce中特定购物车小计的免费赠品 [英] Free Give-Away product for specific cart subtotal in WooCommerce

问题描述

我有一种便宜的产品.仅当购物车小计为200或更多时，我才愿意放弃该产品.

I have one product that is in cheap. I want to give that product away if and only if the cart subtotal is 200 or more.

如果购物车小计为200或更多，请将产品添加到购物车并将价格设置为0.

If the cart subtotal is 200 or more, add the product to the cart and set the price to 0.

如果购物车小计小于200，请从购物车中移除产品.

If the cart subtotal is less than 200, remove the product from the cart.

在添加和删除时，我会使用通知告知客户.除了更改产品价格外，一切都按计划进行.

On adding and removing, I use a notice to inform the customer. Everything works as planned except for changing the product price.

如果有人可以查看我正在使用的代码并解决这一问题，我将非常感激.

If someone can please review the code I'm using and fix that one thing, I would be very grateful.

add_action( 'woocommerce_before_calculate_totals', 'free_product_if_cart_minimum', 10, 1 );
function free_product_if_cart_minimum( $cart ) {

    // go away if admin
    if (is_admin() && !defined( 'DOING_AJAX' )) return;

    // say no to hook repetition 
    if (did_action( 'woocommerce_before_calculate_totals' ) >= 2 ) return;

    $minimum_amount = 200;
    $free_product_id = 4576;
    $cart_items_total = 0;

    // cart loop
    foreach ( $cart->get_cart() as $cart_item_key => $cart_item ){
    
        // is the free product there?
        if ( $cart_item['data']->get_id() == $free_product_id ) {
        
            $free_item_key = $cart_item_key;

        // set the price to zero
        // I've tried them both without success
        
        // $free_item_key->set_price( 0 );
        // $free_product_id->set_price( $price * 0.00 );
    }
    
    // cart subtotal incl. tax and discounts
    $cart_items_total += $cart_item['line_total'] + $cart_item['line_tax'];
    
    }

    // add the free product if not already there
    if ( $cart_items_total >= $minimum_amount && !isset( $free_item_key ) ) {

        $cart->add_to_cart( $free_product_id );

        wc_add_notice( 'Thank you! Here\'s your free product.', 'notice' );
    }

    // if below the minimum, remove the free product
    elseif ( $cart_items_total < $minimum_amount && isset( $free_item_key ) ) {

        $cart->remove_cart_item( $free_item_key );

        // display notice after removal
        wc_add_notice( 'Your cart subtotal is less than 200 and therefore, the free product was removed.', 'notice' );
    }
}

推荐答案

以下将完成工作，将购物车中的免费产品价格设置为零:

The following will do the job, setting the free product price to zero when it's in cart:

add_action( 'woocommerce_before_calculate_totals', 'conditionally_add_free_product' );
function conditionally_add_free_product( $cart ) {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

    // Settings
    $minimum_amount   = 200;
    $free_product_id  = 4576;

    // Initializing
    $cart_subtotal = 0;
    $cart_items    = $cart->get_cart();

    // Loop through cart items (first loop)
    foreach ( $cart_items as $cart_item_key => $cart_item ){
        // When free productis is cart
        if ( $cart_item['data']->get_id() == $free_product_id ) {
            $free_item_key = $cart_item_key; // Free product found (get its cart item key)

            $cart_item['data']->set_price(0);
        }
        // Get cart subtotal incl. tax and discounts (excluding free product)
        else {
            $cart_subtotal += $cart_item['line_total'] + $cart_item['line_tax'];
        }
    }

    // When cart total is up to the minimum amount, add the free product if not already there
    if ( $cart_subtotal >= $minimum_amount && ! isset($free_item_key) ) {
        $cart_item_key = $cart->add_to_cart( $free_product_id );

        // display notice after removal
        wc_add_notice( __("Thank you! Here's your free product."), 'notice' );
    }
    // if below the minimum, remove the free product
    elseif ( $cart_subtotal < $minimum_amount && isset( $free_item_key ) ) {

        $cart->remove_cart_item( $free_item_key );

        // display notice after removal
        wc_add_notice( sprintf(
           __("Your cart subtotal is less than %s and therefore, the free product was removed."), wc_price($cart_subtotal)
        ), 'notice' );
    }
}

代码进入您的活动子主题(或活动主题)的functions.php文件中.经过测试，可以正常工作.

Code goes in functions.php file of your active child theme (or active theme). Tested and works.

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