Markup Cloudflare Turnstile

This module allows you to add Cloudflare's Turnstile CAPTCHA to your website, providing a user-friendly alternative to Google's reCAPTCHA. It is based on MarkupGoogleRecaptcha, allowing for easy switching between the two CAPTCHA systems. If MarkupGoogleRecaptcha is installed, some of its settings are used to configure Turnstile.

Requirements

• ProcessWire >= 3
• PHP >= 8.1
• The website must by added as a website in a Cloudflare account

Useful documentation

• Client-side rendering
• Server-side validation

Installation

1. Download the zip file from Github or clone the repository into your site/modules directory.
2. If using the zip file, extract it in your site/modules directory.
3. In your ProcessWire admin panel, navigate to Modules > Refresh, then Modules > New, then click on the Install button for this module.

API

You must create an API key pair (Site Key and Secret Key) to use this module. Go to Cloudflare Turnstile for instructions on how to create your API keys. Then add the Site Key and Secret Key to the module's settings in ProcessWire.

Usage

Client-side integration

1. Call the module : $captcha = $modules->get('MarkupCloudflareTurnstile');
2. Render the widget: echo $captcha->render();
3. Render the script tag: echo $captcha->getScript();

There are various configuration options listed here: https://developers.cloudflare.com/turnstile/get-started/client-side-rendering/

Server-side verification

To verify the CAPTCHA response on the server side, call verifyResponse(), eg:

if($captcha->verifyResponse() === true) {
    // CAPTCHA passed, proceed with form processing
} else {
    // CAPTCHA failed, handle the error
}

Console errors

Implementation of this module may generate console errors, probably due to this: https://developers.cloudflare.com/turnstile/troubleshooting/troubleshooting-faqs/#i-am-seeing-a-401-error-in-your-console-during-a-turnstile-security-check-is-this-a-problem. These can be safely ignored.