Cat.php

<?php
class Animal {
    public $name;

    function __construct($name){
        $this->name = $name;
    }

    public function getName (){
        return $this->name;
    }
}

class Cat  extends Animal {

    public function meow (){
        return "Cat {$this->name} is saying meow";
	}
}

$cat = new Cat ('garfield');

var_dump($cat->getName () === 'garfield'); // true;

echo PHP_EOL;

var_dump($cat->meow () === 'Cat garfield is saying meow'); // true;