MySQLPHPupgrade
I'm running 10.6.4 and PHP reports itself as version 5.3.2 (5.3.3 is available) and mySQL reports version 5.1.45 (5.1.51 is available)
I know they are minor releases but is it possible to easily update either of these? If so, any hints or pointers as to how?
I'd say unified GUI integration.
With MAMP, you've got a single window to manage Apache, PHP, and MySQL. Whereas with the built-in stack, you have to active PHP manually and have another interface for MySQL (with no easy way to turn it on or off)
Not to lead you in a different direction, but if you were using MAMP (free version) on OS X, that comes with the most up-to-date version of PHP and allows to you switch between 5.2.17 & 5.4.3.
I find that MAMP is less messy than XAMPP.
Best Answer
Briefly; no there is no easy way to update them. (Assuming that compiling from source is not considered easy)
I would strongly caution against modifying the system installed versions as you're likely to have your updated versions broken when Apple issues an update that updates them. (Usually Security Updates and has bitten some users/sysadmins when Perl has been updated)
If you wanted to update them it's a matter of downloading the source files and installing it over top of the provided versions.
As a reasonable alternative I recommend installing your own managed version of PHP and MySQL into
/usr/localor using your packaging software of choice (MacPorts, Fink or Homebrew) or prepared installer (eg. MySQL's .pkg installer that installs into/usr/local).