en-spam.php

<?php
/*
Plugin Name: En Spam
Description: Block Spam with Cookies and JavaScript Filtering.
Plugin URI: http://hatul.info/en-spam
Version: 1.1
Author: Hatul
Author URI: http://hatul.info
License: GPL http://www.gnu.org/copyleft/gpl.html
*/

class EnSpam {
    public function __construct() {
        // Load text domain
        load_plugin_textdomain('en-spam', false, dirname(plugin_basename(__FILE__)));

        // Add hooks
        add_filter('preprocess_comment', [$this, 'check_comment']);
        add_action('wp_enqueue_scripts', [$this, 'enqueue_scripts']);
        add_action('wp_dashboard_setup', [$this, 'add_dashboard_widgets']);
        add_action('wpcf7_before_send_mail', [$this, 'check_cf7'], 10, 3);
        add_action('elementor_pro/forms/validation', [$this, 'check_elementor_form'], 10, 2);
    }

    public function check_comment($comment) {
        if ($this->valid_no_bot() || wp_verify_nonce($_POST['code'], 'en-spam')) {
            $comment['comment_content'] = stripcslashes($comment['comment_content']);
            return $comment;
        } else {
            $this->block_page();
        }
    }

    private function block_page() {
        $this->count_block();
        $message = sprintf(
            __('For to post comment, you need to enable cookies and JavaScript or to click on "%s" button in this page', 'en-spam'),
            __('Post Comment')
        );
        $message .= '<form method="post">';
        foreach ($_POST as $name => $value) {
            if ($name === 'comment') {
                $message .= sprintf('<label for="comment">%s</label><br /><textarea id="comment" name="comment">%s</textarea><br />', __('Your comment:', 'en-spam'), $value);
            } else {
                $message .= sprintf('<input type="hidden" name="%s" value="%s" />', $name, stripcslashes($value));
            }
        }
        $message .= sprintf('<input type="hidden" name="code" value="%s" />', wp_create_nonce('en-spam'));
        $message .= sprintf('<input type="submit" name="submit" value="%s" />', __('Post Comment'));
        $message .= '</form>';

        wp_die($message);
    }

    private function count_block() {
        $counter = get_option('ens_counter', 0) + 1;
        update_option('ens_counter', $counter);
    }

    public function enqueue_scripts() {
        wp_enqueue_script('en-spam', plugins_url('en-spam.js', __FILE__));
    }

    public function add_dashboard_widgets() {
        wp_add_dashboard_widget(
            'en_spam_dashboard_widget',
            __('Blocked Spambots by En Spam', 'en-spam'),
            [$this, 'dashboard_widget_function']
        );
    }

    public function dashboard_widget_function() {
        echo get_option('ens_counter', 0);
    }

    public function valid_no_bot() {
        return isset($_COOKIE['comment_author_email_' . COOKIEHASH])
            || is_user_logged_in()
            || isset($_COOKIE['en_spam_validate']);
    }

    public function check_cf7($form, &$abort, $submission) {
        if (!$this->valid_no_bot()) {
            $abort = true;
            $submission->set_status('validation_failed');
            $submission->set_response($form->filter_message(__('Enable JavaScript and cookies', 'en-spam')));

            $this->count_block();
        }
    }

    public function check_elementor_form($record, $ajax_handler) {
        if (!$this->valid_no_bot()) {
            $ajax_handler->add_error('email', __('Enable JavaScript and cookies', 'en-spam')); // Replace 'email' with the actual field ID
            $ajax_handler->add_error_message(__('Enable JavaScript and cookies', 'en-spam'));

            $this->count_block();
        }
    }
}

// Initialize the plugin
new EnSpam();