<?php

error_reporting(E_ALL);
ini_set('display_errors', "1");

abstract class Struct {
  private $_VALUES = array();
  protected $data = array();

  public function __set($nam, $val) {
    if (!in_array($nam, $this->_VALUES))
      return null;

    $this->data[$nam] = $val;
  }

  public function __get($nam) {
    return $this->data[$nam]
  }
}

class User extends Struct {
  private $_VALUES = array('login', 'email', 'password')

  public function __construct($vals = array()) {
    foreach($vals as $k, $v)
      __set($k, $v);
  }
}

$u = new User(array('login' => 'zacheryph'));
$u->email = 'zacheryph@gmail.com';
$u->password = 'kasper';

printf("user: %s email: %s\n", $u->login, $u->email);

?>