i would suggest u ignore the first two posts as they didn't seem to notice that you already have PHPdev installed.
to re-iterate what spookster said:
to make pages publicaly viewable, you'll need to place them in the public folder inside the www folder.
then click start->run then type winipcfg and press enter
a box will appear telling you your IP address and other stuff, take a note of your IP address.
open a browser and type the following
http://[insert IP address here]/public/[page name]
this will have the same function as typing localhost from your own machine, but will work from anywhere as long as you have apache running