Re: Voting Polls and preventing multiple votes

On 5/26/05, Dan Rossi <php@electroteque.org> wrote: > Hi there I am mocking up a quick voting poll system, however I would > like to put hooks in place to prevent users posting more than once, > voting bots etc. You could use a captcha(www.captcha.net afaik), to prevent bots from voting.. Is there a way to prevent them, obviously sessions, > cookies, host ips cant be used as they can be removed, and especially > with host ips , ppl are usually behind a proxy ip that doesnt > forwarding the referring ip. Proxies usually send the referer using HTTP_X_FORWARDED_FOR. If this isn't the case, then I don't think there is much other information. Even if you did have the IP address, you can't tell if its static, or dynamic. > Let me know if anyone has cooked up > something like this thanks. I have the voting mechanism and result > displaying fine, just the special checks to prevent the form being > displayed. > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > >