<?php require 'dog.php'; $dog = new Dog('Rony'); echo 'The dog name is :' . $dog->name . '<br>'; echo 'The dog says: ' . $dog->speak() . '<br>';
* Animal Speaks * A typical example of polymorphism. */ interface InterfaceAnimal { public function speak(); } class Animal implements InterfaceAnimal { public function speak() { return false; } } class Cat extends Animal { function speak() { return "Meow!"; } } class Dog extends Animal { function speak() { return "Woof!"; } } $dog = new Dog(); echo $dog->speak();