I'm not sure if there's a language barrier here that's causing problems or whether you've just got an attitude, but no-one here has responded with anything unreasonable or useless.
So you want to know what encoding was used for an incoming message; you asked if it might be UTF-8. What exactly is wrong with using $isutf() to determine that and how would anyone be expected to guess that it was 'already known' to you since it apparently answers at least part of your original question?
If the answers are useless to you then you need to be clearer with your question. And maybe take a moment to calm down before lashing out at people who are only trying to help you.
