tools to confuse PHP code?

I want a tool to confuse my PHP code, and I want the following function:

1.replace all variable with no-meaning string, such as $a2233445.
2.delete all comments in the code.
3.throw the code format into confusion.

Does anybody know such a tool?

Thanks!

What's the point?

If you want to protect your code, you should add a licence to it, or encrypt it using the zend compiler thingy.

Have a look at

Mark.

That's what I need, thanks!