Best way to upgrade PHP 5.3 to 5.4

[Tim Johnson]

I'm using a 2011 Mac Mini with OSX 10.7.5

I'd like to upgrade PHP, the current version is 5.3.15 to
5.4.

I can't remember if I originally installed PHP from Macports or if
it was shipped as native to OSX.

Regardless : I would welcome advice on whether to use Macports or if
anyone finds the following :
http://php-osx.liip.ch/
as  preferable.

I'm a bit green when it comes to OSX (previously on linux) and have
two websites in active development based on PHP and I don't want to
screw anything up.

thanks
-- 
Tim 
tim at tee jay forty nine dot com or akwebsoft dot com
http://www.akwebsoft.com