I want to use CodeIgniter but no idea

[eluser]towki[/eluser]
[quote author="skunkbad" date="1340206776"]Since you have built a website using php, I'm sure you understand the complexity that can exist regarding certain functionality. CI attempts to smooth some of that over. I think of frameworks in general as providing shortcuts. I'd say if you know php well, and have a little OOP experience, then the benefits of CI would be obvious.[/quote]


I havent done oop before. Im also new to php. I have created a website with simple function like member login, registration, etc.
by the help of online tuts and using only my way of writing code. And I could say that my codes are messy. Yes I understand now the use of CI but my problem now is how to get started with it. Do i need to learn oop first? And the same as php very well?