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php学习碎碎念

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Release： 2016-06-20 12:31:35
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1.为什么要使用会话控制？

       因为我们浏览网站的时候访问的每一个web页面都是需要的使用http协议的，但是http协议是无状态协议——也就是每一次请求都是独立的请求，不能把持续的同一客户端的请求事务联系起来，所以这里就有了会话技术来支持追踪web用户的持续请求了。

2.

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