How to add Recaptcha 3 on my PHP website |

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How to add Recaptcha 3 on my PHP website

Just follow the steps to get it implemented on you website.

  1. Go to the reCAPTCHA website ( and click on the “Admin Console” button.
  2. Sign in with your Google account or create a new one if you don’t have one already.
  3. Register your website by providing a name and the domain name of your website.
  4. After registering your website, you will be given a Site Key and a Secret Key. You will need these keys to integrate reCAPTCHA v3 with your website.
  5. Add the reCAPTCHA script to your website’s HTML code. This should be placed in the <head> section of your HTML code.

<script src=""></script>

Replace “site_key” with your Site Key.

  1. Add the reCAPTCHA verification code to your website’s JavaScript code. This should be called when the user submits a form.

grecaptcha.ready(function() {

grecaptcha.execute('site_key', {action: 'submit'}).then(function(token) { // Add code to submit the form with the token });


Replace “site_key” with your Site Key.

  1. Verify the reCAPTCHA response on your server-side code. This should be done to ensure that the user is not a robot. The response parameter contains the token generated by reCAPTCHA.

$response = $_POST['g-recaptcha-response'];

$url = '';

$data = array( 'secret' => 'secret_key', 'response' => $response );

$options = array( 'http' => array ( 'method' => 'POST', 'content' => http_build_query($data) ) );

$context = stream_context_create($options);

$result = file_get_contents($url, false, $context);

$response_data = json_decode($result);

if ($response_data->success) { // The user is not a robot, continue with your form processing logic

} else { // The user is a robot, display an error message


Replace “secret_key” with your Secret Key.

That’s it! You have done the reCAPTCHA v3 integration with your PHP website.


About Varadharaj V

The founder of Kvcodes, Varadharaj V is an ERP Analyst and a Web developer specializing in WordPress(WP), WP Theme development, WP Plugin development, Frontaccounting(FA), Sales, Purchases, Inventory, Ledgers, Payroll & HRM, CRM, FA Core Customization, PHP and Data Analyst. Database Management Advance Level

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