问题描述
我需要知道用户是否在 Moodle 在线，有一个 Moodle 块 对于它，但实际上它只是检查用户在过去 X 分钟内是否在 Moodle 上进行了活动，但在我的情况下这没有用.反正有知道的吗?
I need to know if a user is on-line at Moodle, there is a Moodle block for it, but actually it just check if the user had an activity on Moodle in the last X minutes, but in my case that is not useful. There is anyway to know it?
推荐答案
正如其他回答者所说，无法查看用户当前是否在线.正如您提到的，在线用户块检查 mdl_user.lastaccess 的值.这可能是最好的选择，但即便如此，它也取决于用户访问或刷新页面.例如，他们可能正在阅读一个页面 10 分钟，因此从技术上讲，他们仍然在线，但不会显示他们在线.反之亦然，他们可以查看页面并立即关闭它，因此它会显示他们在线但技术上不在线.
As the other answerers say, it isn't possible to see if a user is currently online. As you mentioned, the online users block checks the value of mdl_user.lastaccess. It's probably the best option but even then it depends on the user accessing or refreshing a page. They could be reading a page for 10 minutes for example, so technically still online but it won't show that they are online. Or vice versa, they could have looked at a page and immediately closed it, so it will show they are online but technically not.
同样以我的经验，很多用户并没有退出 Moodle，他们只是关闭了页面.因此，这不是查看他们当前是否已登录的可靠方法.
Also in my experience, a lot of user's don't log out of Moodle, they just close the page. So its not a reliable way to see if they are currently logged in or not.
作为参考，mdl_user.lastaccess按以下顺序更新:
For reference, mdl_user.lastaccess is updated by the following sequence:
转到 index.php 或任何使用 require_login() 的页面，这几乎是 Moodle 中的大部分页面.
Going to index.php or any page that uses require_login() which is pretty much most of the pages in Moodle.
这将调用 user_accesstime_log()
如果 mdl_user.lastaccess 时间在过去 60 秒内没有更新(由 LASTACCESS_UPDATE_SECS 设置)，则 mdl_user.lastaccess用当前的 time()
If the mdl_user.lastaccess time hasn't been updated within the last 60 seconds (set by LASTACCESS_UPDATE_SECS) then the mdl_user.lastaccess is updated with the current time()
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