我想要实现用户登录以后一段时间内再次访问可以不用输入账号密码的过程。目前我的想法是在访问页面的时候检查用户的session，如果有session那么就说明登录了，直接进入，如果没有就跳转到登录页面。
我想知道，这里的session应该怎么写？放在什么位置？（我用的thinkPHP）谢谢！
回复讨论(解决方案)
写一个CommonControll,extends controller，在里面判断session是否存在，如果存在就直接进入，不存在就跳转到登录页面，然后把你想要这个功能的的control写extends CommonController这样就可以了
这里的session应该怎么写？
tp session 文档 http://document.thinkphp.cn/manual_3_2.html#session
没有比这个更详细了
放在什么位置？
可以将检查登录写成一个方法，在要验证登录的地方调用一下就可以了
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