Google recaptcha using php
https://www.google.com/recaptcha/admin/create site_key: 6LcvdScrAAAAAPcLNrU6Yn4iSHv9bUatTi600pab secret_key: 6LcvdScrAAAAABW238OshnA0j46EgUd9sVwvqqs4 <script src="https://www.google.com/recaptcha/api.js" async defer></script> <form action="submit.php" method="post"> <!-- Your form fields here --> <div class="g-recaptcha" data-sitekey="YOUR_SITE_KEY"></div> <input type="submit" value="Submit"> </form> submit.php <?php if ($_SERVER['REQUEST_METHOD'] ===…