Online PHP editor | output for PpmWd

<?php class Food { public function consume() { } } class AnimalFood extends Food { } abstract class Animal { protected $name; public function __construct(string $name) { $this->name = $name; } public function getName(): string { return $this->name; } abstract public function talk(); public function eat(AnimalFood $food) { $food->consume(); } } class Dog extends Animal { public function speak() { echo "woof"; } /* * The dog doesn't care if it's animal food, it'll eat ANY food */ public function eat(Food $food) { $food->consume(); } } class Cat extends Animal { public function speak() { echo "meow"; } } interface Petshop { public function buy(string $name): Animal; } class CatPetshop implements Petshop { public function buy(string $name): Cat { return new Cat($name); } } class DogPetshop implements Petshop { public function buy(string $name): Cat { return new Dog($name); } } $shop = some_func_returning_petshop(); $shop->buy('mavrick')->talk();