PHP - Need Help With Mamp

I am trying to set up a new PHP environment on my newer Macintosh, and cannot seem to get my webserver, MAMP, to work properly.

When I run my PHP code, Firefox launches and the URL says: 

http://www.local.acme/index.php

I am using NetBeans for my IDE, and in the IDE, I have the "Project URL" defined as:

http://local.acme/

I assume there is some problem with how MAMP is set up, but am unsure.  And I tried to copy all of the settings from my old setup on my old Macintosh, but having been away from all of this for about 2 years, I really have no recollection of how I set all of this up.

Am a dead duck until I can get my dev and run enorionments working again.  ?