Determining environment

[email protected] ("R. Hicks") Thu, 11 Sep 2008 21:50:01 -0400
Newsgroups perl.beginners.cgi
Message-ID <[email protected]>
I want a simple way to determine if I am in dev or prod. I currently 
look at the $ENV{'SERVER_NAME'} and that seems to work fine for me but 
my curiosity was up on how others do the same thing.

Robert