问在Woocommerce中限制结账时申请的优惠券数量

EN

add_action( 'woocommerce_applied_coupon', 'custom_applied_coupon', 10, 1 );
function custom_applied_coupon( $coupon_code ){
    $applied_coupons = WC()->cart->get_applied_coupons();
    $coupons_allowed_max = 2; // <=== 2 coupons allowed max

    if( sizeof($applied_coupons) > $coupons_allowed_max ) {
        WC()->cart->remove_coupon( $coupon_code );
        wc_clear_notices();
        wc_print_notice(__("You can only have two applied coupons max…", "woocommerce"), 'error');
    }
}