-
Get reCAPTCHA API keys from http://recaptcha.net/whyrecaptcha.html
-
Upload the 'recaptcha' folder in this archive to your Symphony 'extensions' folder.
-
Enable it at System > Extensions.
-
Go to System > Preferences and enter your reCAPTCHA private/public API key pair.
-
Add the "reCAPTCHA Verification" filter rule to your Event via Blueprints > Events
-
Save the Event.
-
Add "reCAPTCHA: Public Key" Data Source to your page.
-
Add the following line to your form:
<script type="text/javascript" src="http://api.recaptcha.net/challenge?k={/data/recaptcha}"></script>
See http://recaptcha.net/apidocs/captcha/client.html for information about customisation of the reCAPTCHA box.