php session的问题
由于用$_SESSION保存的用户名，只能登陆一个账号，不关闭网页登入第二个账号，会把第一个账号覆盖掉，我不想让第二个帐号覆盖第一个，怎么解决这个问题？大神们请详细一点，本人新手，谢谢了。
------解决思路----------------------
将session存储名改为动态，如uid
$uid=123;
$sesstion_name='uid_'.$uid;
$_SESSION[$sesstion_name]="test";
------解决思路----------------------
那么请问你：张三和李四同时登入当前页，那么如果有一个发帖的动作，那么你说这是张三的还是李四的？
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