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	public function get_visitor_list($uid, $limit = 10, $order = 'add_time DESC') {
		if (! $uid) {
			return false;
		}
		if ($result = AWS_APP::cache()->get('get_visitor_list_' . md5($uid . $limit . $order))) {
			return $result;
		}
		if ($result = $this->fetch_all('people_visitor', 'uid = ' . intval($uid), $order, $limit)) {
			foreach ($result AS $key => $val) {
				$result[$key]['url_token'] = urlencode($val['ausername']);
			}
			AWS_APP::cache()->set('get_visitor_list_' . md5($uid . $limit . $order), $result, get_setting('cache_level_normal'));
		}
		return $result;
	}