Is it possible to detect a visitor's browsing history using JavaScript or PHP?

Question

I want to check if my site's visitors have visited another particular site before coming to mine.

I know how to use JS and PHP to check to see (via referrer info) if the user has just come from that site to mine, but I would like to be able to detect if they have visited this site at any time before (not just immediately before coming to my site). Can this information be detected?

Answer 1

Unfortunately, this is possible this is possible.

You can apply a CSS rule to a:visited that has a background image for a PHP script.

Answer 2

You used to be able to do it (with JavaScript and the CSS psuedo class :visited), but browsers have fixed that exploit.