Description:
------------
Some bugs with __get(), __set()

Reproduce code:
---------------
class Test1
{
    public function __construct() { }
    public function test()
    {
        $this->Prop = 'test';
        echo $this->Prop;
        echo isset($this->Prop);
        echo !empty($this->Prop);
        echo $this->Prop;
    }
}
class Test2 extends Test1
{
    private $prop;
    public function __construct() { }
    public function __get($name)
    {
        $name{0} = strtolower($name{0}); // Property called with first symbol upper case
        switch ($name)
        {
            case "prop" :
                return $this->prop;
                break;
        }
    }
    public function __set($name, $value)
    {
        $name{0} = strtolower($name{0}); // Property called with first symbol upper case
        switch ($name)
        {
            case "prop" :
                $this->prop = $value;
                break;
        }
    }
}
$obj = new Test2();
$obj->test();


Expected result:
----------------
test
{false}
{false}
test

Actual result:
--------------
test
1
1
test

??????? ??????? ?? ???????????? ???????????? ?????????, ??? ???????? ???????? ? ?????????? ????? ?????? ? ?????????? ????????? ????????? ???????? ? ???????????? ????? ??????.
Sory, my english very bad :(