如何在PHP中过度使用对象功能？

I have a PHP project where I build a kind of DOM with PHP objects. Starts with a parent class 'fs' witch holds every object of the webpage in a structure. I want that objects can send each other messages through the parent object 'system'. 'system'-object holds the references for core objects (config, database, template, users, ...). I build a method, with should organize the communication of the 'subobjects' where the name of the object and the called method are permitted by parameters.I have a PHP project where I build a kind of DO