apache newbie

["John-Mark" <jmj@event-horizon.org>]

Hello all I am in the process of configuring apache to use for testing PHP
pages that I write. It will not be used for serving pages to the world. I am
sure that I will post many queries on the subject but the first is to do
with the ServerName option in the httpd.conf file. My machine is called
charm before I start to mess around with the settings in the file I want to
be sure I get them right. do I set the ServerName to charm in the absence of
a fully qualified domain name?
How do I install PHP as a module of Apache so that I can embed the script in
the HTML documents rather that run it in the cgi-bin directory?
All help much appreciated thank you
jm