PHP中SESSION的注销与清除,phpsession注销
PHP中SESSION的注销与清除,phpsession注销
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();
以上所述就是本文的全部内容了,希望大家能够喜欢。

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