Install and run this XAMPP program (which will start a bunch of sub-services/programs that are common -- explained in the article) and then, while it's running, browse to either
http://localhost or
http://127.0.0.1 ("localhost" is synonymous with that IP address) which will show you the XAMPP default page. It's then up to you to replace their supplied default web content with yours, make changes, refresh your browser, and thus "test" the web server. All you need after XAMPP is setup and running is any web browser on the local machine (or LAN) where XAMPP is installed. Try it. You might be impressed how cool (and in some ways "simple"?) this all is.
