Trouble with switch statements

Ok...I just recently installed Apache1 and PHP 4.2.3 on my computer and I've configured everything. However, I can't seem to get my switch statements to accept variable values from the address bar. So if I type in: http://www.my-site.com/index.php?select=1 It displays the text in the default part of the switch statement. I also seem to get the following error message every time: Notice: Undefined variable: select in c:\apache\apache\htdocs\index.php on line 51 Here's the code for my switch statement as well: switch($select) { case 1: print "About Stuff Goes Here."; break; case 2: print "Music Goes Here."; break; default:print "Testing..."; break; }