PHP Collections Framework?

Hi,

I think i'm not searching the web really well, but i'm looking if there
is a Collections Framework in PHP. Just like the one in Java.

The thing is I have a 2 set of 2-dimensional objects that I need to
look for differences. Like a category and members object. I just want
to see the difference between 2 sets. E.g. if the category name was
changed or the member was changed.
Is there such a framework for PHP?

Thanks
cow

all you can find here:
http://www.plsgoogleit.com/