I am trying to use the PHP from Chris’ contact form …
Any help is greatly appreciated
Help with what? Do you have a question?
… if you have a question, describe it in detail. Tell us what you want to achieve, what you tried, and what happened (vs. what you expected to happen). “It doesn’t work” is a very useless thing to say; dumping code out onto the internet and saying “I give up, you fix it” is rude (even if you didn’t mean it to be).
… If you really did give up and just want someone else to fix it, that’s fine – but you’re no longer asking for free advice; you’re looking for someone to hire.