令牌桶算法如何使用php實現(xiàn)

<?phpnamespace ApiLib;/**
 * 限流控制
 */class RateLimit{
 private $minNum = 60; //單個用戶每分訪問數(shù)
 private $dayNum = 10000; //單個用戶每天總的訪問量

 public function minLimit($uid)
 {
 $minNumKey = $uid . '_minNum';
 $dayNumKey = $uid . '_dayNum';
 $resMin = $this->getRedis($minNumKey, $this->minNum, 60);
 $resDay = $this->getRedis($minNumKey, $this->minNum, 86400);
 if (!$resMin['status'] || !$resDay['status']) {
 exit($resMin['msg'] . $resDay['msg']);
 }
 }

 public function getRedis($key, $initNum, $expire)
 {
 $nowtime = time();
 $result = ['status' => true, 'msg' => ''];
 $redisObj = $this->di->get('redis');
 $redis->watch($key);
 $limitVal = $redis->get($key);
 if ($limitVal) {
 $limitVal = json_decode($limitVal, true);
 $newNum = min($initNum, ($limitVal['num'] - 1) + (($initNum / $expire) * ($nowtime - $limitVal['time'])));
 if ($newNum > 0) {
 $redisVal = json_encode(['num' => $newNum, 'time' => time()]);
 } else {
 return ['status' => false, 'msg' => '當前時刻令牌消耗完！'];
 }
 } else {
 $redisVal = json_encode(['num' => $initNum, 'time' => time()]);
 }
 $redis->multi();
 $redis->set($key, $redisVal);
 $rob_result = $redis->exec();
 if (!$rob_result) {
 $result = ['status' => false, 'msg' => '訪問頻次過多！'];
 }
 return $result;
 }}