Form Ajax Plugin with Google Re-Captcha V3

Introduction

The Form Ajax Plugin is a powerful tool for submitting forms via AJAX, allowing you to create seamless and responsive form submission experiences for your website visitors. Google Re-Captcha V3 is a popular anti-spam mechanism that helps protect your forms from bots and automated spam submissions. In this tutorial, we'll show you how to integrate the Form Ajax Plugin with Google Re-Captcha V3 to create a secure and hassle-free form submission experience for your users.

Before You Begin

To follow along with this tutorial, you'll need to have:

1. The Form Ajax Plugin installed on your WordPress site (you can get it from the WordPress repository).
2. A Re-Captcha V3 website key and secret key from Google (you can sign up for a free account on the Google Cloud Console).
3. A working understanding of HTML, JavaScript, and PHP (this tutorial will cover the specific code you need to use).

Step 1: Setting Up Re-Captcha V3

1. Sign in to the Google Cloud Console and navigate to the Re-Captcha V3 dashboard.
2. Click on the "Create a new key" button and select "Create a new key" in the drop-down menu.
3. Fill in the required information, including the website name and URL. You can also choose the "checkbox" option as the Re-Captcha v3 challenge type.
4. Once you've filled in the required information, click on the "Create" button to create the new key.
5. You will receive a "site key" and "secret key" for your Re-Captcha V3 instance. You'll need both of these keys to complete the integration.

Step 2: Adding Re-Captcha V3 to Your Form

1. Locate the form on your WordPress site where you want to add Re-Captcha V3.
2. Insert the following code into your form's HTML, making sure to replace < YOUR_SITE_KEY_HERE > with your actual site key:

   <!-- Re-Captcha V3 widget -->
   <div class="grecaptcha" data-sitekey="< YOUR_SITE_KEY_HERE >"></div>

   This code will display the Re-Captcha V3 widget on your form.

Step 3: Creating a Re-Captcha V3 Token

1. In your JavaScript code, you'll need to create a Re-Captcha V3 token to verify the user's request. You can do this by sending a POST request to the Re-Captcha V3 API with your secret key and the response from the Re-Captcha V3 widget.

   // Create a Re-Captcha V3 token
   function createCaptchaToken() {
   const secretKey = 'YOUR_SECRET_KEY_HERE'; // Replace with your actual secret key
   const response = grecaptcha.getResponse();
   
   $.ajax({
       type: 'POST',
       url: 'https://www.google.com/recaptcha/api/siteverify',
       data: {
           'secret': secretKey,
           'response': response
       },
       success: function(data) {
           if (data.success) {
               // Token created successfully
           } else {
               // Error creating token
           }
       }
   });
   }

   Step 4: Integrating the Form Ajax Plugin

2. In your PHP code, you'll need to use the Form Ajax Plugin's form-ajax-submit function to send the form data to the server.

   // Use the Form Ajax Plugin's form-ajax-submit function
   function submit_form() {
   $ajax_data = array(
       'action' => 'submit_form',
       // Add your form data to the array
   );
   $ajax_data['nonce'] = wp_create_nonce('submit_form_nonce');
   
   $response = wp_send_json_error(__('Error submitting form', 'your-plugin'));
   die();
   }
   add_action('wp_ajax_submit_form', 'submit_form');
   add_action('wp_ajax_nopriv_submit_form', 'submit_form');

   Step 5: Combining the Two

3. In your JavaScript code, you'll need to call the Re-Captcha V3 token creation function and then pass the token to the Form Ajax Plugin's ajax-submit function.

   
   // Create the Re-Captcha V3 token and submit the form
   createCaptchaToken();

$.ajax({ type: 'POST', url: '<?php echo admin_url('admin-ajax.php');?>', data: { 'action': 'submit_form', 'formData': $('form').serialize(), 'token': response }, success: function(data) { // Form submission successful } });

**Conclusion**

By following these steps, you've successfully integrated the Form Ajax Plugin with Google Re-Captcha V3 to create a secure and hassle-free form submission experience for your users. You can now use the Re-Captcha V3 token to verify the user's request and prevent spam submissions. Remember to replace the `YOUR_SITE_KEY_HERE`, `YOUR_SECRET_KEY_HERE`, and `your-plugin` placeholders with your actual values.