Accessing object's properties from another class

oop, php

Solution

class User {
    public $username = null;
    public function __construct() {
        $this->username = "Anna";
    }
}

class Page extends User {
    public function __construct() {
        // if you define a function present in the parent also (even __construct())
        // forward call to the parent (unless you have a VALID reason not to)
        parent::__construct();
    }
    public function print_username() {
        // use $this to access self and parent properties
        // only parent's public and protected ones are accessible
        echo $this->username;
    }
}

$page = new Page;
$page->print_username();

`$user` should be `$this`.

Problem

I'm playing around with OOP in PHP and I've got the following code: index.php: ``` <?php include('user.class.php'); include('page.class.php'); $user = new User; $page = new Page; $page->print_username(); ?> ``` user.class.php: ``` <?php class User { public function __construct() { $this->username = "Anna"; } } ?> ``` page.class.php: ``` <?php class Page extends User { public function __construct() { } public function print_username() { echo $user->username; } } ?> ``` My problem occurs in the class "Page", in the print_username() function. How do I access the $user object's properties within this class? I am, as you can see, defining the two objects in index.php. Thanks in advance /C

Original source