public function isUniqueClick($flight_website_id, $date = '') { $visitorId = $this->getVisitorId(); $cacheKey = "UniqueClick:{$flight_website_id}:{$date}:{$visitorId}"; $retval = RedisHelper::exist($cacheKey); if (!$retval) { RedisHelper::set($cacheKey, true, CACHE_1D); return true; } return false; }