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Home Backend Development PHP Tutorial unset($_SESSION['username']) 删除SESSION的疑惑?

unset($_SESSION['username']) 删除SESSION的疑惑?

Jun 06, 2016 pm 08:34 PM
php session

<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>
Copy after login
Copy after login

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>
Copy after login
Copy after login

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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