Classについて、このPHPコードの実行結果が分かる程度の理解が必要です

wordpress-seminar.php

<?php

class User {
    public $name = 'user';
    public $age = 20;
}

class Admin extends User {
    public $name = 'admin';
}

$user = new User();
$user->age = 30;
echo $user->name;
echo $user->age;

$admin = new Admin();
echo $admin->name;
echo $admin->age;