|
|
Posted by David Gillen on 11/03/06 16:52
An noise sounding like Barry Morris said:
> One web site I have written has a 'register your interest' form which simply
> e-mails the data, this is working fine except some people seem to get off on
> repeatedly using the form to send phoney data. I guess this is from some
> kind of web-bot so I would like to attempt to program around this problem.
>
> One solution is using a distorted image of some letters (CAPTCHA?), however
> I was wondering if anybody has chosen a simpler method, and whether my
> simple method would be impervious to web-bots?
>
> 1/ Generate a random string of letters
> 2/ Ask the user to select from 3 combo boxes 3 random positions, e.g. select
> letters 2, 6 and 7 from LKJIUVBJH.
>
Easy to program around, but unless someone actively wants to circumvent it
probably will do the trick.
There are however plenty of easy to plug in captcha libraries out there.
Google is your friend here.
D.
--
/(bb|[^b]{2})/
Trees with square roots don't have very natural logs.
What's the difference between ignorance and apathy? Who knows? Who cares?
Navigation:
[Reply to this message]
|