Posted by Paul Lautman on 06/15/06 07:44

Francois Bonzon wrote:
> After a Google search, I see that quite a few CAPTCHA implementations
> in PHP are available. I'd like one that's not (easily) OCR-able, or
> otherwise crackable. Open source or commercial is not important. Any
> recommendations, or experience with a specific one to share?
>
> I get a lot of SPAM entries on a guestbook, and want to protect it.
> I'll require users to solve a CAPTCHA before their entry is accepted.
> I might use CAPTCHAs to protect other form submissions, though.

Take a look at www.phpclasses.org, there's a good one gone up there
recently

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