Posted by Kimmo Laine on 09/09/05 15:52

"WeeWillyTonka" <WeeWillyTonka@hotmail.com> wrote in message
news:43217908_1@mk-nntp-2.news.uk.tiscali.com...
>I have a guestbook that keeps getting spamed,what I thinking is can I add
> one of then graphics that you have to key in the number/letter before
> posting.
>
> Then next part how ?
>

Plenty of implementations are available. First read
http://en.wikipedia.org/wiki/Captcha

And check out the php links in the bottom:
http://en.wikipedia.org/wiki/Captcha#PHP

If you still haven't found what you are looking for, google for "php turing
numbers"

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