public function getAnonymousUsers($url)
    {
        $anons = Activity::find()
                    ->where(['and',
                        ['anonymous' => 1],
                        ['like', 'url', $url . '%', false],
                        ['>=', 'updated_at', time() - 5 * 60]
                    ])
                    ->count('id');
        if ($this->_anon) {
            $anons += 1;
        }

        return $anons;
    }