[wp-hackers] php -v

[Helen Hou-Sandi]

To suggestions that the admin display a warning - though it sounds nice,
it's unlikely to be anything but unnecessarily scary for a user. It only
helps those who know how to upgrade their PHP version, and those who know
how to do so are rather unlikely to still be on 5.2, or 5.3 even. We can't
put the burden of what a host uses by default for a new site on a user who
didn't make that choice in the first place.