title: what are the specifics of setting up PHP so that integers will be 64-bit?
body: <p>I think the general idea of PHP being able to have common integer 64-bit (as opposed to use math packages) is to use 64-bit hardware and 64-bit PHP.  Does someone know the specifics?  For example, won't the Core2Duo machine be able to support it?  What about the 32-bit version of OS like Vista or OS X, can they support it too?</p>