whole However, don’t forget that classes can be classified as subclasses. If an object is an instance of a class that extends another class, it is treated as an instance of two classes. This is an important difference because it determines how the is_a() function works and the type hint rules. When you create a class that extends wp\u query, treat it as an instance of wp\u query. This is one of the features that makes object inheritance very useful. The
Suppose there are two classes: social and extended Facebook and twitter. You can check whether these classes are instantiated as \
The $this variable always references the current object, regardless of the class in the inheritance hierarchy. Instead, the keyword \
If the only utility of a class is to avoid using unique prefixes, why group functions into a file without using the file’s namespace? However, classes have inheritance, visibility, and properties that are not in a function group. This is the perfect reason to use classes even if not \
Many people will say that using classes does not mean using object-oriented programming. They are right. Don’t forget that object-oriented programming is inferior to other alternatives in category.
