unset($_SESSION['username']) 删除SESSION的疑惑?
<code>网站登录代码 $_SESSION['username'] = $username; //用户退出登录 unset($_SESSION['username']) //问题来了 1.$_SESSION['username'] 每个用户都这样存放用户名,当N个用户同时并发登录的时候, 会不会把已经登录的用户信息覆盖掉? 2.unset($_SESSION['username']) 会不会把整个网站的用户信息释放掉? </code>
回复内容:
<code>网站登录代码 $_SESSION['username'] = $username; //用户退出登录 unset($_SESSION['username']) //问题来了 1.$_SESSION['username'] 每个用户都这样存放用户名,当N个用户同时并发登录的时候, 会不会把已经登录的用户信息覆盖掉? 2.unset($_SESSION['username']) 会不会把整个网站的用户信息释放掉? </code>
当然不会。session根据session id来标识,相互之间不关联。
一个id,一个会话
php会在session文件夹里
生成N个存储session信息的文件
文件名用session_id区分
这样就不会覆盖了
楼上的都解释了:)
白衣岛主好像很活跃,什么问题都问,难道是个机器人?
我也觉得LZ像是机器人,问的问题水平不一

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