针对目前WordPress博客的垃圾评论依旧来势汹涌，因此垃圾站博客今天的主要话题依旧是如何防范垃圾评论！

方法简介：将以下代码添加到WordPress博客主题的functions.php文件中，根据自己的需要修改 $ bad_comment_content 数组的内容，任何包含在$ bad_comment_content 数组内的字符都将会被自动拒绝留言！

代码如下：

//拒绝包含特定关键词的垃圾评论
function in_comment_post_like($string, $array) {
    foreach($array as $ref) { if(strstr($string, $ref)) { return true; } }
    return false;
}
function drop_bad_comments() {
    if (!empty($_POST['comment'])) {
        $post_comment_content = $_POST['comment'];
        $lower_case_comment = strtolower($_POST['comment']);
        $bad_comment_content = array(
            '338c.com',
            'baige88.com',
            '1e68.com',
            'www.dwz.cn',
            'is'
        );
        if (in_comment_post_like($lower_case_comment, $bad_comment_content)) {
            $comment_box_text = wordwrap(trim($post_comment_content), 80, "\n  ", true);
            $txtdrop = fopen('/var/log/httpd/wp_post-logger/nullamatix.com-text-area_dropped.txt', 'a');
            fwrite($txtdrop, "  --------------\n  [COMMENT] = " . $post_comment_content . "\n  --------------\n");
            fwrite($txtdrop, "  [SOURCE_IP] = " . $_SERVER['REMOTE_ADDR'] . " @ " . date("F j, Y, g:i a") . "\n");
            fwrite($txtdrop, "  [USERAGENT] = " . $_SERVER['HTTP_USER_AGENT'] . "\n");
            fwrite($txtdrop, "  [REFERER  ] = " . $_SERVER['HTTP_REFERER'] . "\n");
            fwrite($txtdrop, "  [FILE_NAME] = " . $_SERVER['SCRIPT_NAME'] . " - [REQ_URI] = " . $_SERVER['REQUEST_URI'] . "\n");
            fwrite($txtdrop, '--------------**********------------------'."\n");
            header("HTTP/1.1 406 Not Acceptable");
            header("Status: 406 Not Acceptable");
            header("Connection: Close");
            wp_die( __('bang bang.') );
        }
    }
}
add_action('init', 'drop_bad_comments');

PS：魔高一尺道高一丈，针对垃圾评论必须来狠的，多管齐下才是好办法！具体方法请在垃圾站博客搜索“评论”查询，注意修改代码前记得备份！

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