phpCoreClass: Base class to extract classes features

This is a base class that can be used to provide sub-classes means to extract their features into variables like the class functions, variables and constants.

The class uses reflection to traverse the sub-class list of variables, functions and constants and stores them in protected variables.

The features are made available through functions named like 'XxxByParent' where Xxx is a class feature being queried as constants, properties or methods.