Re: Trying to cut down on form spam
| From: | Christoph Becker | Date: | Mon, 08 Dec 2014 22:35:48 +0000 |
| Subject: | Re: Trying to cut down on form spam | ||
| References: | 1 2 3 4 5 6 7 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-324096@lists.php.net to get a copy of this message | ||
Ken Kixmoeller:
> Not for international use, but: I just downloaded a bunch of very
> easily-identifiable similarly-formatted pictures. Made them the same size.
> I created a simple table with the name of the picture file and the english
> name of the object, both encrypted. Then a simple function created radio
> buttons with 5 random object names and one of the 5 photos. Display a "The
> best word to identify this:"
>
> Match 'em up & act accordingly.
Such visual-only CAPTCHAs might be impossible to solve by visually
impaired people. It's better to provide a fallback for them, what might
be even required by law.
--
Christoph M. Becker