Function for Checking Class Inheritance in OOP in PHP

Задание 1

Make a class ChildClass inheriting from ParentClass, which in turn inherits from GrandParentClass.

Задание 2

Using the is_subclass_of function, check if the class ChildClass is a descendant of GrandParentClass.

Задание 3

Using the is_subclass_of function, check if the class ParentClass is a descendant of GrandParentClass.

Задание 4

Using the is_subclass_of function, check if the class ChildClass is a descendant of ParentClass.