PHP在多进程模式下（并发的web访问）由于没有内置的锁支持，在处理一些资源的之后，很容易出现并发性问题。



在web开发中我们经常对我们的数据库耗时操作做缓存，但是可能出现一个陷阱，在缓存失效的一瞬间，大量的访问得到缓存失效的标示，都去后端查询数据库，导致



同时大量的数据库耗时查询，出现数据库宕机等问题。此问题隐藏深，不容易查找。本项目主要用于解决php的进程间锁问题。-PHP in the multi-process mode (concurrent web access) because there is no built-in lock support, after dealing with some resources, it is easy concurrency problems.



In web development in our database, we often time-consuming operation to do caching, but it may be a trap, the moment of failure in the cache, a large number of access cache invalidation notices, go to the back-end to query the database, resulting in



At the same time a large number of database time-consuming queries, database downtime and other problems. This problem is hidden deep, not easy to find. This project is mainly used to solve the php process lock problem....