How do I add a CAPTCHA to my PHP form?

Question

My knowledge of php is not good and I need help.

I have this php form but I don\'t know how to add a CAPTCHA mechanism.

How do I achieve this?

Answer 1

Check this detailed guide about captcha implementation in PHP: http://www.the-art-of-web.com/php/captcha/

Answer 2

I really like Securimage is seems to work really well and does not require a third-party external service or javascript (unless you enable the new image feature). Also it can be configured to provide audio captcha for accessibility.