Extend oxBase class

Hello I am developing a module and I want extend the oxBase class and add a functionality to it and use it in my module but apparently it’s not possible to extend the oxBase class. Is there any other way around ?

oxbase is extended directly by other classes that are not affected when you change oxbase. You have to extend each class that extends oxbase on its own, e.g. oxarticle, oxcategory etc. See here: http://planet.oxidforge.org/2015/08/overloading-non-overloadable-classes-dont.html