Really, really strange thread title given the question. However - the answer to your question is yes. I'm sure you meant "32 or 64 bit" though
In fact, Mac OS X comes with an Apache 1.3 web server. It can be enabled via the Personal Web Sharing feature in the Sharing section of System Preferences. It has PHP 4 support, though this is not enabled. However, if you want to enable PHP, use Apache 2.X or use MySQL you'll have to do a bit more work. You have several choices when it comes to this sort of thing:
MAMP, for the total novice, or for someone who wants a pre-built server
MAMP PRO, for those who want a pre-built but fully customizable server
Various pre-built installers, for those who don't know how or can't compile it themselves
The good old "grab the source, compile it yourself" method