How to very place this very simple requestJson call ?

[h...@nnes]

Hi there,

Sorry the post went of before finished! So this is my actual post:
I'm trying to send some json object to php and to get the very same
object back.
I envisioned that to be the absolute minimum configuration, but I
still can't get it to
work. Please point me to WHERE, WHAT is doing WRONG? I was exeprcting
to
get prompted with "1", but instead it is causing an error by returning
NULL?

Thanks a lot, Best, Hannes


THIS IS THE CALL FROM JS

        $('loadJson').addEvent('click', function(e) {
                e.stop();
                var jsonRequest = new Request.Json({
                    method: 'get',
                        url: 'http://www.whatever.com/JSONdeANDencode.php',
                        onComplete: function(realJson, stringJson){
                                alert(realJson.a);
                        }
               }).send("json="+Json.encode({'a': '1', 'b': '2'}));
        });



THIS IS THE JSONdeANDencode.php

        $arr = json_decode($_GET['json']);
        $json = json_encode($arr);
        print $json;