A PHP 5 class miming Objective-C's nil object.

RRNil.class.php

<?php

/*
 * Copyright (c) 2009, Romain Ruetschi <[email protected]>
 * Code licensed under the BSD License:
 * See http://opensource.org/licenses/bsd-license.php
 */

final class RRNil
{
    
    private static $_instance = NULL;
    
    public static function getInstance()
    {
        if( !is_object( self::$_instance ) )
        {
            self::$_instance = new self();
        }
        
        return self::$_instance;
    }
    
    private function __construct()
    {
        
    }
    
    public function __clone()
    {
        return $this;
    }
    
    public function __wakeup()
    {
        return $this;
    }
    
    public function __get( $name )
    {
        return $this;
    }
    
    public function __set( $name, $value )
    {
        return $this;
    }
    
    public function __isset( $name )
    {
        return FALSE;
    }
    
    public function __unset( $name )
    {
        return;
    }
    
    public function __call( $methodName, $arguments = array() )
    {
        return $this;
    }
    
}