Description:
------------
Magic method __set() is bypassed on recursive call. 
PHP automatically creates a property on instance instead of recursively calling __set() or instead of throwing a recursivity error

For additional details, please read: http://www.qc4blog.com/?p=458

Reproduce code:
---------------
class Fruits
{
	protected $_props = array(); // inner array mapping properties to values
	
	public function __set($name, $value) 
	{
		$this->_props[$name] = $value;
		if ('apple' == $name) {
			$this->apple = 'green';
		}
	}
}

$a = new Fruits();
$a->banana = 'yellow';
var_dump(property_exists($a, 'banana')); // output: false
$a->apple = 'red';
var_dump(property_exists($a, 'apple')); // output: true


Expected result:
----------------
Throw a recursivity exception

Actual result:
--------------
no exception thrown, property is automatically created by passing __set()