json_decode(file_get_contents('php //input') true) null
if($_SERVER["REQUEST_METHOD"] == "POST" && $_SERVER["CONTENT_TYPE"] == "application/json")
{
$data = file_get_contents("php://input", false, stream_context_get_default(), 0, $_SERVER["CONTENT_LENGTH"]);
global $_POST_JSON;
$_POST_JSON = json_decode($_REQUEST["JSON_RAW"],true);
// merge JSON-Content to $_REQUEST
if(is_array($_POST_JSON)) $_REQUEST = $_POST_JSON+$_REQUEST;
}