- 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.