personally I use tHTTPd, its a very simple HTTP demon with PHP support, its so simple, tell it where to look for your page in its config, and run it, simple. You can get it from aminet. If you want something more serious go for apache but for my tHTTPd does the job nicely, I use PHP for my counter, and I know a guy who uses it to host his PHP site,
www.rycochet.com iirc.