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anybody can give me some tips about oop? thanks..............

what tips in particular?

in general, read up on design patterns, single responsibility principle, open/closed principle, Liskov substitution principle... those concepts are very important in OOP.

If you're new to OOP, I think Design Patterns would be a bit too much to handle. Not that I'm underestimating your capabilities or that I'm comparing myself to you. But put in mind first the four principles of OOP:

- Inheritance
- Encapsulation
- Polymorphism
- Abstraction

I dunno if there's a correct order. Once you understand that, you can go to design patterns. Design Patterns are mostly associated with polymorphism(the cool ones). Ask around if you have any more doubt.

i beg to differ. when i read about design patterns, it was only then that OOP to me made sense

i've known about OOP/abstraction/inheritance/polymorphism (C++, Turbo Pascal, Java and C# syntax) for more than a decade before my encounter with design patterns. yet it was only then that I realized that I never really knew how to use them. so in effect, I only learned what real OOP was when I learned about it.

ya your right! im new to oop, but im not new to programming. its just i never use it before when i start.

I have an idea for dodge. If you could explain to yourself all those four principles then perhaps you could jump to design patterns?

you will learn more about oop the moment you start applying it in your projects.  dont worry if you dont get everything right the first time.  you can always refactor later :)  

agree with smash. most of the time it's ok to code things badly only to refactor them when you've noticed it stinks this'll prevent you from overengineering your designs. refactoring to patterns, ika nga.

try this www.objectorientedphp.com

OOP Demystified
Recommended book for learning OOP. Medyo may mga redundant na mga sentences and examples pero ayos lang ung explanation to different OOP concepts  and principles (Encapsulation, Inheritance, Abstraction, Polymorphism, Method Overloading, Overridding, etc). :D