一个不错的WordPress评论算术题验证码插件

作者：袖梨 2022-06-25

下面是插件代码，自行取走。

/*
Plugin Name: 简单算术题评论验证码插件
Description: 提交评论之前必须写出简单的算术题答案
Version: 1.0
Author: 否子戈

代码如下

复制代码

if(!class_exists('comment_capatcha')) {
    class comment_capatcha {
        function __construct() {
            add_action('comment_form', array(& $this, 'print_capatcha'));
            add_filter('preprocess_comment', array(& $this, 'preprocess_comment'));
        }
        function print_capatcha() {
            if(!is_user_logged_in()) {
                global $post;
                session_start();
                $rand_1 = mt_rand(1,20);
                $rand_2 = mt_rand(1,20);
                $_SESSION['capatcha_'.$post->ID] = $rand_1 + $rand_2;

$str = '

';
                $str .= "{$rand_1} + {$rand_2} = ".'';
                $str .= '智商合格才能评论 *';
                $str .= '

                echo $str;-
            }
        }
        function preprocess_comment($commentdata) {
            if(!is_user_logged_in()) {
                session_start();
                $post_id = isset($_POST['comment_post_ID']) ? $_POST['comment_post_ID'] : 0;
                if(!$post_id){
                    wp_die('警告：数据来源非法！！');
                }
                $capatcha = $_SESSION['capatcha_'.$post_id];
                if($capatcha != $_POST['capatcha']){
                    wp_die( __('警告：你智商有问题，不允许评论，请返回重新计算。') );
                }
                unset($_SESSION['capatcha_'.$post_id]);
            }
            return $commentdata;
        }
    }