Php WooCommerce在购物车项目中复制产品而不增加产品数量

请try 使用以下内容:

// Duplicate cart item (separated)
add_filter('woocommerce_update_cart_action_cart_updated', 'action_on_cart_updated');
function action_on_cart_updated( $cart_updated ) {
    $cart = WC()->cart;

    if ( ! $cart->is_empty() ) {
        foreach ( $cart->get_cart() as $item_key => $item ) {
            if ( $item && 5 <= $item['quantity'] ) {
                // Adjust cart item quantity
                $cart->set_quantity( $item_key, ($item['quantity'] - 1), false );
                $item_data = ['unique_key' => md5(microtime().rand()), 'free_item' => 'yes'];
                // Add a separated product (free )
                $cart->add_to_cart($item['product_id'], 1, $item['variation_id'], $item['variation'], $item_data);
            }
        }
    }
    return $cart_updated;
}

// Set cart item price
add_filter('woocommerce_before_calculate_totals', 'action_before_calculate_totals');
function action_before_calculate_totals( $cart ) {
    if ((is_admin() && !defined('DOING_AJAX')))
        return;

    foreach ( $cart->get_cart() as $item_key => $item ) {
        if ( isset($item['free_item']) ) {
            $item['data']->set_price(0);
        }
    }
}

// Display "Free" instead of "0" price
add_action('woocommerce_cart_item_subtotal', 'filter_cart_item_displayed_price', 10, 2);
add_action('woocommerce_cart_item_price', 'filter_cart_item_displayed_price', 10, 2);
function filter_cart_item_displayed_price($price_html, $cart_item){
    if (isset($cart_item['free_item'])) {
        return 'FREE';
    }
    return $price_html;
}

代码位于您的子主题的unctions.php文件中(或在插件中).应该能行得通.