if (       defined $settings && ! $settings->{hidecode}
       and $codtype{ $node->{nodetype} }
    or     $node->{code}
       ||  containscode( $node->{doctext} )
) {
# ...
##</code><code>##

where
       EXISTS (select 1 from users where
               users.user_id = acct.user_id
    or    (acct_id is null
       and user_id = 0)