php oop接口或抽象类

Question

Can anyone give me an example of the following desired OOP structure please.

I want a main class (super class) (interface or abstract class?) where all the other classes that are extending from it can have their functions called from instances of the main super class.

e.g.

class mainSupoerClass() {

}

class doWork exends mainSupoerClass(){
    public function addEntity(){
        //do stuff for entity
    }
}

I want be able to do this:

$data = new mainSupoerClass;
$data->addEntity();  (doesnt belong to this class but its fetching the function from doWork class)

Can anyone give me a start on the correct OOP structure to carry out this work?

Answer 1

In simple terms, you can't. You have to instantiate the extended class and you'll get all functions within the instantiated class and also the parent class/classes.

Is there any reason you need this to be done this way?