Turnstile PHP Validator

This package provides a simple way to validate Cloudflare Turnstile CAPTCHA tokens using PHP and Guzzle. It allows you to integrate Cloudflare's CAPTCHA verification into your server-side application.

Installation

To install this package, use Composer:

composer require toolslib/turnstile-php

Requirements

• PHP 7.4 or higher
• Guzzle HTTP Client (automatically installed with Composer)

Configuration

To use the validator, you need to have a valid Cloudflare Turnstile secret key. You can obtain this key from the Cloudflare Turnstile Dashboard.

Usage

1. Set Up the Validator

First, create an instance of the Validator class and pass your secret key:

use ToolsLib\TurnstilePhp\Validator;

// Your Cloudflare Turnstile secret key
$secretKey = 'your-secret-key';

// Initialize the validator
$validator = new Validator($secretKey);

2. Validate the Turnstile Token

Next, you can use the validateTurnstileToken method to validate a CAPTCHA response from the user. This method requires the Turnstile token that was received from the client-side as well as an optional IP address (CF-Connecting-IP header from Cloudflare):

// Get the Turnstile response token from the form submission
$token = $_POST['cf-turnstile-response'];

// Get the user's IP address (optional, but recommended for extra validation)
$ip = $_SERVER['HTTP_CF_CONNECTING_IP'] ?? null;

// Validate the token
$isValid = $validator->validateTurnstileToken($token, $ip);

// Check the result
if ($isValid) {
    // The CAPTCHA token is valid, proceed with your logic
    echo "CAPTCHA validation succeeded.";
} else {
    // The CAPTCHA token is invalid, handle the failure
    echo "CAPTCHA validation failed.";
}

3. Handle Errors

In case of an error (e.g., network issues, invalid response from Cloudflare), the method will return false. You can handle this by either logging the error or showing an appropriate message to the user.

try {
    // Validate the token
    $isValid = $validator->validateTurnstileToken($token, $ip);

    if ($isValid) {
        // CAPTCHA validation succeeded, proceed with your logic
        echo "CAPTCHA validation succeeded.";
    }
} catch (ToolsLib\TurnstilePhp\TurnstileValidationException $e) {
    // Handle the exception if validation fails
    echo "Error: " . $e->getMessage();
}

License

This package is open-source and available under the GNU GPL v3 license.

Contributing

Contributions are welcome! Please feel free to fork the repository, create a new branch, and submit a pull request. For major changes, please open an issue first to discuss what you would like to change.