I use OOP in PHP strictly to organize code, I can't even apply the term encapsulation properly, since the data isn't hidden. But it still gives me a way to keep the member variables and methods together and group them as objects.
I don't bother with the getter and setter methods and just make all the member variables public. But then when I write the methods for the objects, I don't have to worry about passing around large number of variables, I just set them member variables as I need, and then call the methods. I think it kind of helps with readability, and organization.
Yes, I do know how this must make a lot of OO developers cringe...