$json = '{"nick":'"ya\u011fmur","ya\u011fmura","ya\u011fmurcul","ya\ u011fmurda","ya\u011fmurdan","ya\u011fmurdur","ya\ u011fmurla","ya\u011fmurlar","ya\u011fmurlar\u0131 ","ya\u011fmurlar\u0131n","ya\u011fmurlu"'}';
$user = json_decode($json);
echo 'Nick : ' . $user->nick;