Using ReCaptcha in your component

If you are using JForm on the frontend, then implementing a CAPTCHA plugin is very easy; you just need to add a field to your XML file, then add a couple of language strings. Edit the folio.xml file under /components/com_folio/models/forms/ and add the following field after description:

<field
   name="captcha"
   type="captcha"
   label="COM_FOLIO_CAPTCHA_LABEL"
   description="COM_FOLIO_CAPTCHA_DESC"
   validate="captcha"
   namespace="contact"
/>

Now, add the following language strings in /components/com_folio/language/en-GB/en-GB.com_folio.ini:

COM_FOLIO_CAPTCHA_LABEL="Enter code"
COM_FOLIO_CAPTCHA_DESC="This is to verify that you are a human"

Joomla! can use a variety of CAPTCHA plugins, but ReCaptcha is built-in; that is why we are using it in this book. For ReCaptcha to work, you must enable the Captcha – ReCaptcha plugin, and enter your Public Key and Private Key that you get when you sign up at http://www.google.com/recaptcha:

You should also set...