Hi,

The company I work for has four domains and I'm trying to set up the cookies, so one cookie can be generated and tracked across all the domains. From reading various posts on here I thought it was possible.

I've set up a sub domain on one site, to serve a cookie and 1*1 pixel image to all four sites.

But I can't get this working on the other sites.

If anyone can clarify that:

1. Its possible?
2. If I'm missing something obvious or a link to a good example?

I'm trying to do this server side with PHP.

Thanks