php中session和cookie的区别
php 中 cookie 和session 的区别:
1、cookie数据存放在客户的浏览器上,session数据放在服务器上。
2、cookie不是很安全,别人可以分析存放在本地的COOKIE并进行COOKIE欺骗,考虑到安全应当使用session。
3、session会在一定时间内保存在服务器上。当访问增多,会比较占用你服务器的性能, 考虑到减轻服务器性能方面,应当使用COOKIE。
4、单个cookie在客户端的限制是3K,就是说一个站点在客户端存放的COOKIE不能3K。所以个人建议:将登陆信息等重要信息存放为SESSION,其他信息如果需要保留,可以放在COOKIE中。

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