Re: Graphically displayed number to confirm user is a human
| From: | David Grant | Date: | Wed, 04 Jan 2006 16:59:49 +0000 |
| Subject: | Re: Graphically displayed number to confirm user is a human | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-228154@lists.php.net to get a copy of this message | ||
Dave M G wrote:
> First, is there a term for these kinds of images, or that kind of
> verification system? What would be the best search terms to look for
> source scripts?
CAPTCHA
> Second, can anyone recommend a resource for that kind of PHP script. If
> I really worked at it, I could probably write the script to generate a
> small PNG image with a random number in it. But I haven't the faintest
> clue how to distort it so it's only legible to humans, nor how to
> correlate the image with a number that a user inputs into a form field.
http://pear.php.net/package/Text_CAPTCHA
Cheers,
David
--
David Grant
http://www.grant.org.uk/