如何限制注册用户尝试投票两次 [英] how to restrict registered user from trying to vote twice

问题描述

我是php编码和网站设计的新手。

I'm very new to php coding and website designing.

我正在尝试开发一个在线投票系统，只允许注册用户投票。做了所有事情并且它工作正常，但我需要的帮助是在用户注销后。

I'm trying to develop an online voting system, where registered users are only allowed to vote. Have done everything and it's working fine, but the help I need is after the user have logged out.

如何让用户无法再次登录投票两次？

How can I make the user not to be able to login again and vote twice?

或

我如何才能第二次重定向用户？

How I can I redirect the user the second time?

推荐答案

这主要是一个设计问题，但有一种方法是在投票后为数据库设置一个标志用户。当用户登录时，您将检查该标志以查看是否已进行投票并相应地重定向。

This is mainly a design question but one method would be setting a flag in the database once a vote has been casted for the user. When the user logs in you would check the flag to see if a vote has been made and redirect accordingly.

该标志可以位于响应代码中，也可以位于响应数据中。

The flag can be in the response code or from the response data.

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