PHP or mod_perl

Which one should I use for my websites? I'm not worried about difficultly, just power and performance.

>>23
ini_set

>>24
It's really only a problem (and not even a very big one) if you try to develop software that works exactly the same on every given configuration, which you almost never will be.

PHP has some problems, but the fact that it's configurable to such an extent isn't one of them.