Description:
------------
Hi
Before you read the code, I want to say that the code that is given in this section works fine. The only problem is for the code that is given in the "Reproduce code".



class A {
	private $a = 1;
}

class B extends A {
	private $b = 2;
}

$v = new B;
print_r(unserialize(serialize($v)));


Output (which is correct):


B Object ( [b:private] => 2 [a:private] => 1 )

Reproduce code:
---------------
class A {
	private $a = 1;
	public function __sleep() {
		$vars = get_object_vars($this);
		return array_keys($vars);
	}
}

class B extends A {
	private $b = 2;
}

$v = new B;
print_r(unserialize(serialize($v)));

Expected result:
----------------
B Object ( [b:private] => 2 [a:private] => 1 )

Or

B Object ( [b:private] => 2 )

I prefer the first one! But both could be correct!!

Actual result:
--------------
Notice: serialize() [function.serialize]: "a" returned as member variable from __sleep() but does not exist in <__FILE__> on line 14
B Object ( [b:private] => 2 [a:private] => 1 [a] => )