CAPTCHA for Contact Form

Hi,

I have a couple of forms and am receiving a number of spam submissions, and thus thought of installing a captcha.  Can someone tell me how to add a captcha to my forms, to limit the number of spam submissions?

Ideally the captcha would be free, with few/no advertisements.

Thanks.
LVL 2
alleonAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

alain34Commented:
Hello alleon,

I personally use Securimage at http://www.phpcaptcha.org/
Free and easy to install.

Regards,

alain34
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
biztigerCommented:
If you want a solution, difficult for any OCR (automized program to read the captcha value) use animated captcha. It is quite imposible for any spammer to detect captcha by using OCRs.

http://www.phpclasses.org/browse/package/3929.html
0
ON-DEMAND: 10 Easy Ways to Lose a Password

Learn about the methods that hackers use to lift real, working credentials from even the most security-savvy employees in this on-demand webinar. We cover the importance of multi-factor authentication and how these solutions can better protect your business!

zstapicCommented:
Hi, I've been using http://www.phpcaptcha.org
You need to download the files, in the same directory as your registration script.
It's simple to use:

							<img id="captcha" src="./securimage/securimage_show.php" alt="CAPTCHA Image" />
							<p>
								<a href="#" onclick="document.getElementById('captcha').src = './securimage/securimage_show.php?sid=' + Math.random(); return false">Another image</a>
							</p>
<input type="text" name="captcha_code" size="10" maxlength="6" />

Open in new window

0
biztigerCommented:
0
alleonAuthor Commented:
Hi I want would like to use PHP Captcha (http://www.phpcaptcha.org).

Can someone tell me how can I link the things (including both audio and images + having my own text phrases) to my form?

I am using HTML not PHP..
0
alleonAuthor Commented:
I mean, can someone tell me how should I add this CAPTCHA to my form?  I would like to go for the full version, including sound and my own text phrases.

Thanks for everyone :)
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
PHP

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.