跟踪网站上的IP

Question

I want to keep track of all unique users that view a certain website. I could do this by making a log-in system, but that's not a viable solution for my wishes. I would like to get the IP of someone to keep track of everything that person has done (it is a system where people have to judge sentence quality and they must preferably only get a certain sentence once).

I've seen this solution: echo $_SERVER['REMOTE_ADDR'];

How useful/recommended is this for my wishes? Any recommendations? I would have an SQL-table containing with such an IP address as primary key to store the judgements that have been made.

Thanks in advance!

Answer 1

As Dagon says, an IP address will inevitably be re-used over and over. You could store a uniquely generated string in a cookie, this string could be used as the primary key.

If you want to store the IP anyway, you could do so along with the token.

$myToken = hash('sha256',$_SERVER['REMOTE_ADDR'].time());
setcookie('myToken',$myToken,strtotime("+1 month"));

But cookies can always be edited, I'd still advise a login.