CAA: Christian Anime Alliance

When straylight did that "(user) is my favorite user" was that with PHP? I have seen the PHP tags button, but I don't know how to use it (I know zilch about PHP) so if you put PHP tags in here, would they not show up to anyone else even if you replied? Is that how he did it? I suppose that sort of knowledge wouldn't be good, because if too many of us pulled pranks like that, it could be disastrous... Otherwise, though, what do people actually use the PHP tags button for?