Ok, this is a good thing. At least now we know where the problem lies. I have been working with PHP, Apache, MySQL for a long time and I can tell you when I first started out, I tried turning my home machine into a development machine. So I did as you did and download the packages and tried to configure and install everything. Spent weeks trying to get it and never could.
Here is what I finally did which may or may not be an option for you:
Uninstall the packages you installed. PHP/Apache/MySQL.
I am guessing you are on a Mac OS X machine by the link you provided. Here is what I did only I am on a windows machine, but I did research and I did find similar packages for Mac.
I use WAMP. Windows Apache, MySQL, and PHP. I looked and there is MAMP, Mac Apache, MySQL, and PHP. These packages, at least on the windows box install everything and configure most things for you. These packages install and configure very easily. Probably be up and running in less than 10 to 15 minutes.
Here is a link to the site I found:
I only did about 2 minutes worth of research so you may want to check around see what you can find.
Hope that helps.