As you might know, php.net pulled the support for all version of php 4. I think it's about time! That beast has to be put down quickly with it's many many problems and poor OOP support, really trying to program with code compatible to php 4 as well is a horrible pain to anyone who heard the words OOP and Regular Expressions. Since creators of php stopped supporting it, i said, why should I really worry about it too much?
PHP 5 is great, really, but there are alot of things to improve, like no more c-style functions like strstr(), strcmp(), ect... It's time to go for classes and maybe namespaces. I would really rather call $str->indexOf("mystring") then do it with the old style c function way (i really hated that about c btw, visual c++.net was alot more like it). Also event really checked the exception model yet of PHP, but i haven't seen too many people using it even tho it exists, so i guess i hope they will work on that too.
What do you guys think? What do you want from PHP 6, which is in development now.
Some article I came across about it:
http://jero.net/articles/php6