Mac 10.6 apache php mysql setup

Hello. could someone please post links or help me out with setting up a apache web server with php (preferably 5) and mysql on the Mac OS X 10.6 . I want to only use the distribution of apache that comes bundled with the OS because it gets automatic updates(i think) and also I have had problems with the windows XAMP in the past.

Also could someone answer a related question, when you install a web server for only local use for a local developement environment does it open any holes in your system that can be taken advantage of by hackers?

Thanks in advance. For those in the bay area enjoy the break in the weather this week.