Description:
------------
The  Soap Server handling responses with references in class member variables and crashes with an Exception.

Test script:
---------------
http://www.sebastianviereck.de/en/php7-soap-server-bug-ticket/

Expected result:
----------------
if you execute the soap client, you get an error:
Fatal error: Uncaught SoapFault exception: [SOAP-ENV:Server] SOAP-ERROR: Encoding: Cannot find encoding in client.php on line 24
( ! ) SoapFault: SOAP-ERROR: Encoding: Cannot find encoding in client.php on line 24

Actual result:
--------------
Result in PHP5.3 is

stdClass Object
(
    [posts] => Array
        (
            [0] => Array
                (
                    [title] => Demo Post 1
                    [body] => Demo content 1
                )

            [1] => Array
                (
                    [title] => Demo Post 2
                    [body] => Demo content 2
                )

            [2] => Array
                (
                    [title] => Demo Post 3
                    [body] => Demo content 3
                )

            [3] => Array
                (
                    [title] => Demo Post 4
                    [body] => Demo content 4
                )

        )

)