KDE log in failure after PHP install

I installed the RPM for PHP using WebMin
and then created a test .php3 test file.
I followed instructions to add the php modules to httpd.conf and the mime
type to the global config.

All standard stuff so I thought.

I rebooted and now I can't log in to KDE.
Strangely though, the test php3 file does load up and run.

Even more strange, is that I deleted the changes I made to the httpd.conf
file and rebooted because I couldn't log in to KDE and now it appears that
the installed RUNNING PHP version is not the one I installed but the one
Mandrake 9.1 comes with, I think it's 4.0.....

I guess all I really need to do is find out how to log into KDE again.


Is this some kind of authentication problem?

Thanks again.