How to implement single sign-on. Only by logging in can you access other web interfaces. How can the management backend see that a user is online and can force him to log off?
Use js to continuously request to obtain the current user login status. The background uses the interface to determine the IP address of each user's login. If there are duplicates, record them. During background operations, the front-end js is also required to continuously request to determine whether to force offline.
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在你要限制的页面加入<?php if($_SESSION('用户信息')){ } ?>,然后在用户登录的时候在用户表加个字段is_login, 如果登录了为1,没有登录为0,然后你就可以在后台看到了Use js to continuously request to obtain the current user login status. The background uses the interface to determine the IP address of each user's login. If there are duplicates, record them. During background operations, the front-end js is also required to continuously request to determine whether to force offline.