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Accessing json array by string? (Converting string to var. name)
data.window[r] //etc... but not result

$lang_id = (int) ($_POST['lang_id']);

if($lang_id == 1)
{
     $lang['simle'] = 'aaa';
     $lang['array'] = 'bbb';
}

if($lang_id == 2)
{
     $lang['simle'] = 'ccc';
     $lang['array'] = 'ddd';
}

print json_encode($lang);

$.post("get_lang.php", { "lang_id": 2}, function(data){

   $('.lang').each(function() {

     var r = $(this).attr('rel');
     var v = data.r;

     $(this).text(v);

    });

},"json");

var v = data[r];

header("Content-Type: application/json");