<?php

$nokiaPhone = new Phone();
$nokiaPhone->model = "Nokia 6610";

$kim = new Employee();
$kim->firstName = "Victorya";
$kim->lastName = "Kim";
$kim->personalPhone = $nokiaPhone;

class Phone {
    public $model;
}

class Employee {
    public $firstName;
    public $lastName;
    public $personalPhone;
}

print_r($kim);