How do I add a CAPTCHA to my PHP form?

问题

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?

回答1:

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.

回答2:

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

来源：https://stackoverflow.com/questions/2179375/how-do-i-add-a-captcha-to-my-php-form

标签

php

forms

captcha

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