Description:
------------
documentation (http://php.net/manual/en/reflectionproperty.getvalue.php) marks the parameter ($object) as optional. Also the type pf the expected parameter is wrong. The docu says 'string', but an object is expected. 
Using it as says results into a PHP warning.

Test script:
---------------
<?php
class tux
{
    protected $sibling = 'beastie';
    public function gnu()
    {
        echo 'gnu';
    }
}

$class = new ReflectionClass('tux');
$property = $class->getProperty('sibling');
$property->setAccessible(true);
echo $property->getValue();

Expected result:
----------------
beastie

Actual result:
--------------
PHP Warning:  ReflectionProperty::getValue() expects exactly 1 parameter, 0 given in /home/lapistano/tmp/relectionProperties.php on line 20
PHP Stack trace:
PHP   1. {main}() /home/lapistano/tmp/relectionProperties.php:0
PHP   2. ReflectionProperty->getValue() /home/lapistano/tmp/relectionProperties.php:20

Warning: ReflectionProperty::getValue() expects exactly 1 parameter, 0 given in /home/lapistano/tmp/relectionProperties.php on line 20

Call Stack:
    0.0001     326584   1. {main}() /home/lapistano/tmp/relectionProperties.php:0
    0.0002     327924   2. ReflectionProperty->getValue() /home/lapistano/tmp/relectionProperties.php:20


Variables in local scope (#1):
  $class = class ReflectionClass { public $name = 'tux' }
  $property = class ReflectionProperty { public $name = 'os'; public $class = 'tux' }
  $propertyValue = *uninitialized*