how to convert a json to a php object in symfony2?

Via jquery, I ajax/POST this json

{"indices":[1,2,6]}:

to a symfony2 action. Right now I only really care for the array, so if this makes things considerably easier I could just post [1,2,6] as well.

How can I convert this to a php object?

Somehow, this does not work:

/**
 * @Route("/admin/page/applySortIndex", name="page_applysortindex")
 * @Method("post")
 * @Template()
 */
public f开发者_JAVA百科unction applySortIndexAction()
{
    $request = $this->getRequest();
    $j = json_decode($request->request->get('json'));
    $indices = $j->indices;
    return array('data'=> $indices);
}

gives a

Notice: Trying to get property of non-object in .../PageController.php line 64 (500 Internal Server Error)

which would be where I access $j->indices, where $j seems to be null

The poster:

$.ajax({
      type: 'POST',
      url: "{{ path('page_applysortindex')}}",
      data: $.toJSON({indices: newOrder}),
      success: ...

To get the data sent via body use:

$request = $this->getRequest();
$request->getContent();

inspect the output and then act upon. but this will contain the json.

(yep, tested it. this leads to your json)

getting a POST-parameter with name json from within a controller:

$request = $this->getRequest();
$request->request->get('json');

Request-object

$j = json_decode('{"indices":[1,2,6]}');

var_dump($j);

leads to:

object(stdClass)#1 (1) {
  ["indices"]=>
  array(3) {
    [0]=>
    int(1)
    [1]=>
    int(2)
    [2]=>
    int(6)
  }
}