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self-increasing counter

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Release： 2016-07-25 08:43:55
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Self-increasing counter based on redis, generating self-increasing numbers
  1. /**
  2. * Generate self-increasing number
  3. *
  4. * @param string $key cache key
  5. * @param int $step self-increasing step size
  6. * @param int $expires cache expiration time, unit seconds
  7. *
  8. * @return int $num ;
  9. * @author leeyi
  10. */
  11. function incr_num($key='ddg', $step=1, $expires=0) {
  12. // The link redis is encapsulated in OrgRedis()
  13. $redis = new OrgRedis();
  14. $cache_key = 'incrnum:'.$key;
  15. $num = $redis->handler->incrBy($cache_key, (int)$step);
  17. $millisecond = $expires> 0 ? $expires*1000 : (get_time_235959()*1000+999);
  19. $redis->handler->pexpireAt($cache_key, $millisecond); // Set expiration time
  21. return $num;
  22. }
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自增长计数器
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