问Woocommerce中特定产品类别的零购物车项目价格

EN

add_action( 'woocommerce_before_calculate_totals', 'custom_price_product_category', 20, 1 );
function custom_price_product_category( $cart ) {

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

    if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
        return;

    foreach ( $cart->get_cart() as $cart_item ) {
        // When a product has 'glass' as category we null the price.
        if( has_term( 'glass', 'product_cat', $cart_item["product_id"] ) ){
            // Added Woocommerce 3+ compatibility
            if( version_compare( WC_VERSION, '3.0', '<' ) )
                $item['data']->price = '0';
            else
                $item['data']->set_price(0);
        }
    }
}