Closure::bind()を使ってprivate変数をすっぱ抜く

<?php

/**
 * http://jp2.php.net/manual/ja/closure.bind.php
 *
 * @author Katsuhiro Ogawa
 */

class Wozozo
{
    private $secret = 'happy';
}

$wozozo = new Wozozo();
//$wozozo->secret;
// -> Fatal error: Cannot access private property Wozozo::$secret

$moriyoshi = Closure::bind(function() {
    return $this->secret;
}, $wozozo, 'Wozozo');

var_dump($moriyoshi());