you can use in the Code Snippets plugin or add directly to the functions.php file of your WordPress themeComplete Code for Adding Cloudflare Turnstile CAPTCHA to Login and Lost Password Pages: // Function to retrieve Cloudflare Turnstile keysfunction cloudflare_key() {    $sitekey = "YOURKEY";  // Replace with your own site key    $secretkey = "YOURSKEY";  // Replace with your own secret key    return [$sitekey, $secretkey];} // Enqueue Cloudflare Turnstile script and add custom styles to the login pageadd_action('login_enqueue_scripts', function() {    wp_enqueue_script('cloudflare-turnstile', 'https://challenges.cloudflare.com/turnstile/v0/api.js');    echo "<style>p.submit, p.forgetmenot {margin-top: 10px!important;}.login form{width: 303px;} div#login_error {width: 322px;}</style>";}); // Add Cloudflare Turnstile widget to the login formadd_action('login_form', function() {    echo '<div class="cf-turnstile" data-sitekey="' . cloudflare_key()[0] . '"></div>';}); // Verify CAPTCHA on loginadd_action('wp_authenticate_user', function($user, $password) {    // Get the CAPTCHA response from the form    $captcha = $_POST['cf-turnstile-response'];     // If no CAPTCHA response is provided, return an error    if (!$captcha) {        return new WP_Error('captcha_invalid', __('<center>Captcha Invalid! Please check the captcha!</center>'));    }     // Get the secret key and user IP address    $secretKey = cloudflare_key()[1];    $ip = $_SERVER['REMOTE_ADDR'];     // Prepare data for the Cloudflare Turnstile API verification    $url_path = 'https://challenges.cloudflare.com/turnstile/v0/siteverify';    $data = array(        'secret' => $secretKey,        'response' => $captcha,        'remoteip' => $ip    );     // Set up the HTTP POST request    $options = array(        'http' => array(            'method' => 'POST',            'content' => http_build_query($data)        )    );        // Execute the API request    $stream = stream_context_create($options);    $result = file_get_contents($url_path, false, $stream);     // If the request fails, return an error    if ($result === false) {        return new WP_Error('captcha_invalid', __('<center>Captcha Invalid! Please check the captcha!</center>'));    }     // Decode the JSON response from the API    $responseKeys = json_decode($result, true);     // If the CAPTCHA validation fails, return an error    if (intval($responseKeys["success"]) !== 1) {        return new WP_Error('captcha_invalid', __('<center>Captcha Invalid! Please check the captcha!</center>'));    }     // CAPTCHA is valid, continue the login process    return $user; }, 10, 2); // Enqueue Turnstile script for lost password pageadd_action("wp_head", function() {    wp_enqueue_script('cloudflare-turnstile', 'https://challenges.cloudflare.com/turnstile/v0/api.js');}); // Add custom styles to the lost password pagefunction lost_password_style() {    wp_register_script('lostpassword-recaptcha', 'https://challenges.cloudflare.com/turnstile/v0/api.js', false, NULL);    wp_enqueue_script('lostpassword-recaptcha');    echo "<style>p.submit {margin-top: 10px!important;}</style>";}add_action('login_enqueue_scripts', 'lost_password_style'); // Add Cloudflare Turnstile widget to the lost password formadd_action('lostpassword_form', function() {    echo '<div class="cf-turnstile" data-sitekey="' . cloudflare_key()[0] . '"></div>';}); // Verify CAPTCHA during password reset (lost password)add_action('lostpassword_post', function($errors) {    // Get the CAPTCHA response from the form    $captcha = $_POST['cf-turnstile-response'];     // If no CAPTCHA response is provided, add an error and stop the process    if (empty($captcha)) {        $errors->add('captcha_invalid', __('Captcha is missing. Please check the captcha!'));        return $errors;  // Stop further processing    }     // Get the secret key and user IP address    $secretKey = cloudflare_key()[1];    $ip = $_SERVER['REMOTE_ADDR'];     // Prepare data for the Cloudflare Turnstile API verification    $url_path = 'https://challenges.cloudflare.com/turnstile/v0/siteverify';    $data = array(        'secret' => $secretKey,        'response' => $captcha,        'remoteip' => $ip    );     // Set up the HTTP POST request    $options = array(        'http' => array(            'method' => 'POST',            'content' => http_build_query($data)        )    );     // Execute the API request    $stream = stream_context_create($options);    $result = file_get_contents($url_path, false, $stream);     // If the request fails, return an error    if ($result === false) {        $errors->add('captcha_invalid', __('Failed to connect to Cloudflare Turnstile service.'));        return $errors;    }     // Decode the JSON response from the API    $responseKeys = json_decode($result, true);     // If the CAPTCHA validation fails, return an error    if (intval($responseKeys["success"]) !== 1) {        $errors->add('captcha_invalid', __('Captcha Invalid! Please check the captcha!'));        return $errors;    }     // CAPTCHA is valid, continue with the password reset process    return;}, 10, 1);