php – WooCommerce – 基于子类别的条件购物车计算

代码：

add_action( 'woocommerce_cart_calculate_fees','table_chairs_cart_discount',10,1 );
function table_chairs_cart_discount($cart_object) {

    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

    // Initializing variables
    $chairs_total = 0;
    $table_total = 0;
    $discount = 0;

    // Iterating through each cart item
    foreach($cart_object->get_cart() as $item_key => $item):

        $item_line_total = $item["line_total"]; // Item total price (price x quantity)

        // Chairs subcategory items
        if(has_term('chairs','product_cat',$item['product_id']))
            $chairs_total += $item_line_total;

        // Table subcategory items
        if(has_term('table',$item['product_id']))
            $table_total += $item_line_total;

    endforeach;

    // ## CALCULATIONS ##
    if( $table_total <= $chairs_total && $chairs_total > 0 ) 
        $discount -= $table_total;
    elseif ($chairs_total > 0) 
        $discount -= $chairs_total;

    // Adding the discount
    if ($discount != 0)
        $cart_object->add_fee( __( 'Chairs discount','woocommerce' ),$discount,false );
        // Note: Last argument in add_fee() method is related to applying the tax or not to the discount (true or false)
}

代码位于活动子主题(或主题)的function.php文件中.或者也可以在任何插件php文件中.

相关回答：Discount for Certain Category Based on Total Number of Products