php class User extends AUser public static countUser public function _

<?php
class User extends AUser{
 public static $countUser = 0;
 public function __construct($name, $login, $password){
  ++self::$countUser;
 }
}

class SuperUser extends User implements ISuperUser{
 public static $countSUser = 0;
 public function __construct($name, $login, $password, $role){
  ++self::$countSUser;
 }
}
echo 'Всего обычных пользователей: '. User::countUser; 
echo 'Всего супер-пользователей: '. SuperUser::countSUser;
?>