Finding scripts

[FiRe]

I have a website game, and I want to find out if people are using automated scripts or playing the game.

Currently it logs on each page the ip and referring url, but thats not good enough as a simple request to a page leaves no url. Is there anyway I can track who is human and who is a script (apart from CAPTCHA's)?

[ryan_b83]

Make a bunch of images with slightly distorted letters, and have them type it in to verify they are a human, rather than a computer. Then allow them to play.

[eelixduppy]

Related Thread [webmasterworld.com].

Dreamcatcher's solution of asking for the sum of two numbers is one I like, and I'm sure you can find it useful too. :)

Good luck!

[FiRe]

No, what I meant was say the user's website is blah.com and on one of the pages it fetches data from my site and displays it on theirs. Now it won't show up as a referer and $_SERVER['REQUEST_URI'] still has my site url in. Is there anyway I can track the page is being accessed from blah.com?