public static function delete($params)
 {
     Session::verifyCsrfToken(Helpers::select("token", $_GET));
     $post = DB::get("select id from posts p where p.id = :id", array("id" => $params["id"]));
     if (!$post) {
         Helpers::notFound();
     }
     DB::query("delete from posts where id = :id", array("id" => $params["id"]));
     $back_page = Helpers::select("page", $_GET, 1);
     Helpers::redirect("/posts/" . $back_page);
 }