till wrote:
It's doable, but not so pretty.
Till
In future more and more hosts will migrate to PHP5 so it makes sense to support the new, modern language which speeds things up and makes development much easier compared to PHP5. If you still develop in PHP4 you are wasting a lot of development time finding reference issues, building an error system, coding with slow DBAL's. And trust me - I did some performance tests, all PHP4 DBAL's are pretty slow compared to something that is implemented in C.
It would be something different and I would agree to not go for PHP6 until it has been around for at least a year.
lg, Mike