php - Recognising visitors between domains -


Is it possible to get user information that can be used as a unique identifier among domains?

What I am trying to do is as a quick example (not exactly, but the principle is the same) that says you have a main website in UK- News.com. You also had three other sites - England-News, Scotland-News.com and Wales- News.com, all of which were hosted on the same server.

All 4 sites will share the same database and each just drag relevant information about it. If a user becomes a member of one of the sites, then they have the option of becoming a member of any or all of the others. Will also be given. If a user signs in to the site then he is a member of a member, and then goes to someone else, and how the site can get to recognize it by signing it, so it automatically logs it happens?

My principle is to provide some user information (IP, USANN.NET, browser, screen resolution, computer name, OS) in the database via PP Had to store and then check against all those people when the user continues to move between the sites. However, all of them are also being investigated, I am sure that it will be possible for two different people to get the same details.

Is there any real identifier that will guarantee that a person is recognized between the domain?

Thanks Steve

I do not know what the configuration of your server is, but. If a site is under something. Domains Com, and the other some 2.domain.com, and Domain England- News.com and Scotland- News Dots are only linked to those sites, you can use URL overwrite, and share cookies, subdomain options in PHP but I think this is not the case. So ...

There is no 100% fixed user identity. And it's great, imagine what will happen if it happens. You can never rely on user data and header data, while sometimes you can not rely on the $ _SERVER array. So there is no alternative to identifying the same user on some domains.

1) The only answer is useful, which suggests you to share the user's MySQL table, and make the same login and password for each site. In that case another person can access any other site using the same data.

2) You can try to rely on other acit services such as google acount or facebook acount to verify users on your site. But you should remember that there are people without Gmail and Facebook, and the availability of such a site will be reduced.

3) Use a serivis like cookies, or something like that, but this 100% sure. It is using HT55 storage, flash objects and everything to verify whether it is the same user. But as far as I know, if everything can be alright, then everything can be finished.

Best regards!

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