Integrating Cloudflare Turnstile to Bricks Comments

bricks_turnstile.php

<?php <--// remove
    
// Cloudflare Keys
function cloudflare_key() {
    $sitekey = "XXXXXXXXXX";
    $secretkey = "XXXXXXXXXX";
    return [$sitekey, $secretkey];
}

// Use Turnstile for comments, load only on single posts
add_action("wp_head", function () {
    if (is_single()) {
        wp_enqueue_script('cloudflare-turnstile', 'https://challenges.cloudflare.com/turnstile/v0/api.js');
    }
});

/*
 * Adding Cloudflare Turnstile to WordPress Comment
 * @link https://redpishi.com/wordpress-tutorials/cloudflare-turnstile-captcha-wordpress/
*/
function is_valid_captcha($captcha) {

    if (!$captcha) {
        return false;
    }
    $secretKey = cloudflare_key() [1];
    $ip = $_SERVER['REMOTE_ADDR'];

    $url_path = 'https://challenges.cloudflare.com/turnstile/v0/siteverify';
    $data = array(
        'secret' => $secretKey,
        'response' => $captcha,
        'remoteip' => $ip
    );

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

    $stream = stream_context_create($options);

    $result = file_get_contents($url_path, false, $stream);

    $response = $result;

    $responseKeys = json_decode($response, true);
    if (intval($responseKeys["success"]) !== 1) {
        return false;
    }
    else {
        return true;
    }
}

add_action('init', function () {
    if (!is_user_logged_in()) {
        add_action('pre_comment_on_post', function () {
            $response = $_POST['cf-turnstile-response'] ?? '';
            if (empty($response)) wp_die(__("<b>ERROR:</b> please select <b>I'm not a robot!</b><p><a href='javascript:history.back()'>« Back</a></p>"));
            else if (!is_valid_captcha($response)) wp_die(__("<b>please select I'm not a robot!</b>"));
        });

        add_filter('comment_form_defaults', function ($submit_field) {
            $submit_field['submit_field'] = '<div class="cf-turnstile" data-sitekey="' . cloudflare_key() [0] . '"></div><br>' . $submit_field['submit_field'];
            return $submit_field;
        });
    }
});