class Obj {
	private $name = 'PRIVATE';
	private $vars = array();
	public function getPrivate() {
		return $this->name;
	}
	public function __set($k,$v) {
		$this->vars[$k]=$v;
	}
	public function __get($k) {
		if (isset($this->vars[$k]))
			return $this->vars[$k];
		return null;
	}
}

echo '<pre>';
$o = new Obj();
$o->name = 'PUBLIC';

var_dump($o->getPrivate());
var_dump($o->name);

$a = array(
	0,1,2,3,4,
	0,  2,3
);

$xor=$n=$m=null; // <- digits
$sums=array();//	sums of XOR for every bit
foreach($a as $k=>$v) {
	$xor ^= $v;
	foreach(range(1,$v) as $vv) {
		if ($v&$vv) {
			if (!isset($sums[$vv]))
				$sums[$vv]=null;
			$sums[$vv] ^= $v;
		}
	}
}
// search $m,$n
foreach($sums as $v) {
	if ($v>0 && ($v^$xor)>0){
		$n=$v;
		$m = $xor^$n;
		break;
	}
}
echo 'n='.$n.' m='.$m;