Correctly log out of PHP SESSION

WBOY
Release: 2016-08-08 09:26:07
Original
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/*
1、每个页面都必须开启session_start()后才能在每个页面里面使用session。

2、session_start()初始化session,第一次访问会生成一个唯一会话ID保存在客户端(是基于cookie保存的),用户下次访问时,session_start()会检查有没有会话ID,如果有浏览器会带着这个会话ID过来(通过发送头文件传过来的,这个可以用ff浏览器看到)来确定客户端。

3、给于cookie的session会在客户端保存一个会话ID即session_id,这个可以通过打印cookie看到,这个session_id的键值为session_name,
session_id() == $_COOKIE[session_name()]

4、如果客户端禁用了cookie,则必须用url传递session_id即给予URL的SESSION

5、注销SESSION时不能用unset($_SESSION),可以使用$_SESSION = array()或则$_SESSION = null,正确注销session的方法如下:
*/

//正确的注销session方法:
//1开启session
session_start();

//2、清空session信息
$_SESSION = array();

//3、清楚客户端sessionid
if(isset($_COOKIE[session_name()]))
{
    setCookie(session_name(),'',time()-3600,'/');
}
//4、彻底销毁session
session_destroy();
Copy after login

 

The above introduces the correct way to log out PHP SESSION, including the relevant aspects. I hope it will be helpful to friends who are interested in PHP tutorials.

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