How can I add Recaptcha V2 to a Webflow form and modify the PHP script for form handling?

To add reCAPTCHA V2 to a Webflow form and modify the PHP script for form handling, follow these steps:

1. Obtain reCAPTCHA API credentials

• Go to the reCAPTCHA website (https://www.google.com/recaptcha) and sign in with your Google account.
• Register your website by adding a label and specifying the domains where the reCAPTCHA will be used.
• After registration, you will receive reCAPTCHA keys: Site key and Secret key.

1. Add reCAPTCHA to your Webflow form

• Open your Webflow project and go to the page where the form is located.

• Add an HTML Embed element to the form or any desired location on the page.

• Inside the HTML Embed element, paste the following HTML code:

  ```html

  \`\`\`

• Replace YOUR_SITE_KEY with the Site key obtained from the reCAPTCHA website.

1. Modify the PHP script for form handling

• Export your Webflow project and unzip the exported folder.

• Locate the PHP script responsible for handling the form submission. It's usually found in the "form" or "mail" folder.

• Open the PHP script in a text editor.

• Before the code that sends the email or performs other form-processing actions, you need to add code to validate the reCAPTCHA response. Add the following PHP code snippet before the form-processing logic:

  ```php
  $recaptchaResponse = $_POST['g-recaptcha-response'];
  $secretKey = 'YOUR_SECRET_KEY';
  $verifyResponse = file_get_contents('https://www.google.com/recaptcha/api/siteverify?secret=' . $secretKey . '&response=' . $recaptchaResponse);
  $responseData = json_decode($verifyResponse);

  if (!$responseData->success) {
  // reCAPTCHA validation failed. Handle the error accordingly (e.g., show an error message).
  // You might want to redirect the user back to the form page, preserving their entered data.
  exit();
  }
  ```

• Replace YOUR_SECRET_KEY with the Secret key obtained from the reCAPTCHA website.

1. Configure form submission

• Find the code that processes the form submission and uses the form data.
• Make sure the necessary form fields are added correctly and consistently in your PHP script so that the information gets processed and sent as desired.
• Test your form to ensure reCAPTCHA works and the form submission functions correctly.

By following these steps, you can add reCAPTCHA V2 to your Webflow form and modify the PHP script for handling form submissions. This will help protect your form from spam and ensure that the data submitted through the form is legitimate.

Additional Questions:

1. How do I register my website for reCAPTCHA V2?
2. What is the difference between reCAPTCHA V2 and reCAPTCHA V3?
3. Can I customize the appearance of reCAPTCHA in my Webflow form?