[一个不错的网站]一个不错的WordPress评论算术题验证码插件

【www.bbyears.com--WordPress】

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

*/

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;
        }
    }

}

if( !isset($comment_capatcha) ) {
    $comment_capatcha =& new comment_capatcha();
}

将上面的代码保存在comment_capatcha.php中，上传到wordpress的wp-content/plugins/目录下，到后台启动该插件就可以了。

不过，如果你是通过阅读如何自己设计wordpress评论列表及评论框之后自己设计的自己的评论框，那么一定要注意do_action("comment_form", $post->ID);的位置，因为验证算术题会在它的位置打印出来

本文来源：http://www.bbyears.com/wangyezhizuo/41179.html