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由于我无法更改服务器配置文件,但是需要修改保持用户登录的时间为2h。
于是我phpinfo了一下发现gc_maxlifetime=1440,
于是查了很多资料,将此函数用在登录的页面上了,用来代替原本的session_start()。
function start_session_custom($expire = 36000)
{
   ini_set('session.gc_maxlifetime', $expire);

   if (empty($_COOKIE['PHPSESSID'])) {
        session_set_cookie_params($expire);
        session_start();
    } else {
        session_start();
        setcookie('PHPSESSID', session_id(), time()+ $expire);
    }
}
尽管将$expire设为36000(10h),可是仍然不起作用。
另:一堆老代码里竟然有很多个session_start,莫非要所有的都替换为start_session_custom?
我只在第一个session_start的页面(也就是登录页面)改莫非就不行?


更正一下:
全文查了一下 发现居然有session_set_save_handler
其中
而$maxlifetime=72000;
 function gc($maxlifetime)
{
if(rand(0,1000)%1000!=0)return false;
$expiretime = $this->now - $maxlifetime;
return $this->db->query("DELETE FROM $this->table WHERE `last_activity`
    }


回复讨论(解决方案)

原则是:在 session_start 之前设置,否则无效

你可以将你的这段代码放入公共文件(所有的程序都会加载他的那种),而删去其他文件中的 session_start
如果你觉得查找起来比较麻烦,那么你可以在 php 5.4 环境中运行一下你的项目
php 5.4 会对重复出现的 session_start 发出警告,据此修改起来就很方便了

从 start_session_custom的代码可见的确是在 session_start 之前设置。
我的想法是,登录页面第一次调用了start_session_custom,然后后面的session都会使用start_session_custom里设置的gc_maxlifetime。

这么说失效的原因还是后面页面的session_start咯?

在程序中所做的设置,在程序结束后就失效了

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