根据特定产品 ID 商品数量更改特定 WooCommerce 购物车商品价格

Question

我在 WooCommerce 中有一个代码，一旦您使用 ID 购买产品： 1561、1919、1568、1562、1563、1564、1565、1566、1567 所以，第二个产品是 NIS 10。

优惠商品仅限ID 1561的商品 代码运行得很好，但是一旦我想要有多个促销，它就不起作用了。

例如： 如果您购买两种产品，那么我希望客户能够以 10 新谢克尔的价格获得两次产品 1561 如果您购买五种产品，那么我希望客户能够以 NIS 10 收到五倍产品 1561 等等...

add_action('woocommerce_before_calculate_totals', 'change_second_item_price', 10, 1);

function change_second_item_price($cart) {
    if (is_admin() && !defined('DOING_AJAX')) {
        return;
    }

    $discounted_product_id = 1561;
    $new_regular_price = 10; // NIS 10

    // Initialize count for the target products
    $target_product_count = 0;

    // Loop through cart items
    foreach ($cart->get_cart() as $cart_item_key => $cart_item) {
        $product_id = $cart_item['product_id'];

        // Check if the product is one of the target products
        if (in_array($product_id, array(1561, 1919, 1568, 1562, 1563, 1564, 1565, 1566, 1567))) {
            $target_product_count += $cart_item['quantity'];

            // Check if it's the discounted product and change the regular price
            if ($product_id == $discounted_product_id && $target_product_count >= 2) {
                $cart_item['data']->set_regular_price($new_regular_price);
                $cart_item['data']->set_price($new_regular_price); // Also set the current price to the regular price
                break; // Stop the loop after changing the regular price for the second item of the discounted product
            }
        }
    }
}

Answer 1

我认为你需要先计算最大折扣产品数量，然后为适当的产品设置价格：

add_action('woocommerce_before_calculate_totals', 'change_second_item_price', 10, 1);

function change_second_item_price($cart) {
    if (is_admin() && !defined('DOING_AJAX')) {
        return;
    }

    $discounted_product_id = 1561;
    $new_regular_price = 10; // NIS 10

    // Initialize count for the target products
    $target_product_count = 0;

    // Loop through cart items
    foreach ($cart->get_cart() as $cart_item_key => $cart_item) {
        $product_id = $cart_item['product_id'];

        // Check if the product is one of the target products
        if (in_array($product_id, array(1561, 1919, 1568, 1562, 1563, 1564, 1565, 1566, 1567))) {
            $target_product_count += $cart_item['quantity'];
        }
    }

    // Loop through cart items again, to find the discounted product
    foreach ($cart->get_cart() as $cart_item_key => $cart_item) {
        $product_id = $cart_item['product_id'];

            // Check if it's the discounted product and change the regular price
        if ($product_id == $discounted_product_id && $target_product_count >= $cart_item['quantity']) {
            $cart_item['data']->set_regular_price($new_regular_price);
            $cart_item['data']->set_price($new_regular_price); // Also set the current price to the regular price
        }
    }
}

请记住，这允许客户始终以 10 新谢克尔购买 1561。我认为这是您的意图，但我不确定。

Answer 2

在以下代码中，将更改特定购物车商品（最小数量为 2）的价格，启用、基于某些定义的产品数量（购物车商品数量）并进行计算。

您需要在第一个函数中定义：

• 要打折的产品ID、当前正常价格和想要的折扣价格。
• 允许折扣的目标产品ID

// Utility function: Get the discounted product price
function get_discounted_product_price( $cart_items ) {
    $targeted_products_ids  = array(1919, 1568, 1562, 1563, 1564, 1565, 1566, 1567); 
    $product_id_to_discount = 1561;
    $current_price          = 20; // Here define the product active price
    $discounted_price       = 10; // Here define the discounted price

    $targeted_count = $discounted_count = $discounted_key = false; // Initialize variables

    // Loop through cart items: Count items
    foreach ( $cart_items as $item_key => $item ) {
        // count targeted products 
        if ( in_array($item['product_id'], $targeted_products_ids) ) {
            $targeted_count += $item['quantity'];
        }
        // count targeted products 
        elseif ( $item['product_id'] == $product_id_to_discount ) {
            $discounted_count += $item['quantity'];
            $discounted_key    = $item_key;
        }
    }

    // Calculate new discounted price
    if ( $targeted_count > 1 && $discounted_count > 1 ) {
        $difference_count = $targeted_count - $discounted_count;

        if ( $difference_count >= 0 ) {
            $new_price = $discounted_price;
        } else {
            $difference_count = -$difference_count;
            $new_price = (($discounted_price * $targeted_count) + ($current_price * $difference_count)) / $discounted_count;
        }
        return array('key' => $discounted_key, 'price' => floatval($new_price));
    }
    return false;
}

// change specific cart item price
add_action( 'woocommerce_before_calculate_totals', 'change_cart_item_price', 100, 1 );
function change_cart_item_price( $cart ) {
    if ( is_admin() && ! defined('DOING_AJAX') )
        return;

    $cart_items = $cart->get_cart();
    $data = get_discounted_product_price( $cart_items );

    if ( ! $data ) 
        return;

    $cart_items[$data['key']]['data']->set_price($data['price']);
}

// For minicart: change cart item displayed price html
add_filter( 'woocommerce_cart_item_price', 'filter_cart_item_price_html', 10, 3 );
function filter_cart_item_price_html( $price_html, $cart_item, $cart_item_key ) {
    $data = get_discounted_product_price( WC()->cart->get_cart() );

    if ( isset($data['key']) && $data['key'] === $cart_item_key ) {
        $args = array( 'price' => $data['price'] );

        if ( WC()->cart->display_prices_including_tax() ) {
            $product_price = wc_get_price_including_tax( $cart_item['data'], $args );
        } else {
            $product_price = wc_get_price_excluding_tax( $cart_item['data'], $args );
        }
        return wc_price( $product_price );
    }
    return $price_html;
}

代码位于活动子主题（或活动主题）的functions.php 文件中。已测试并工作。