PHP: Universal Null Object

NullObject.php

<?php 

/**
 * Universal NULL object.
 * 
 * Will throw no error messages so can be used as universal parameter.
 * Does overwrite all available magic methods used in PHP5.3.
 * 
 * @author Julius Beckmann
 */
class NullObject {
  public function __construct() {}
  public function __destruct() {}
  public function __set($name, $value) {}
  public function __get($name) { return null; }
  public function __isset($name) { return false; }
  public function __unset($name) {}
  public function __call($name, $args) {}
  public function __toString() { return ''; }
  public function __invoke() {}
  public function __clone() {}
  public static function __callStatic($name, $args) {}
}

/*
// Testcode
$null = new NullObject('foo');
var_dump($null);
var_dump($null->a = 42);
var_dump($null->a);
var_dump(isset($null->a));
unset($null->a);
var_dump($null->a('bar'));
var_dump($null::a('bar'));
var_dump((string)$null);
var_dump($null('foobar'));
var_dump(clone $null);
unset($null);
die();
*/