强大的小墙Anti-Spam

WordPress的垃圾评论是越来越多，by Willin Kan大师的小墙更是相当的强大！

使用：将代码放入主题的functions.php中即是。

<?php
/* <<小牆>> Anti-spam v1.82 by Willin Kan. 2010/12/16 最新修改 */
//建立
class anti_spam {
  function anti_spam() {
    if ( !current_user_can('level_0') ) {
      add_action('template_redirect', array($this, 'w_tb'), 1);
      add_action('init', array($this, 'gate'), 1);
      add_action('preprocess_comment', array($this, 'sink'), 1);
    }
  }
  //設欄位
  function w_tb() {
    if ( is_singular() ) {
      ob_start(create_function('$input','return preg_replace("#textarea(.*?)name=([\"\'])comment([\"\'])(.+)/textarea>#",
      "textarea$1name=$2w$3$4/textarea><textarea name=\"comment\" cols=\"100%\" rows=\"4\" style=\"display:none\"></textarea>",$input);') );
    }
  }
  //檢查
  function gate() {
    if ( !emptyempty($_POST['w']) && emptyempty($_POST['comment']) ) {
      $_POST['comment'] = $_POST['w'];
    } else {
      $request = $_SERVER['REQUEST_URI'];
      $referer = isset($_SERVER['HTTP_REFERER'])         ? $_SERVER['HTTP_REFERER']         : '隱瞞';
      $IP      = isset($_SERVER["HTTP_X_FORWARDED_FOR"]) ? $_SERVER["HTTP_X_FORWARDED_FOR"] . ' (透過代理)' : $_SERVER["REMOTE_ADDR"];
      $way     = isset($_POST['w'])                      ? '手動操作'                       : '未經評論表格';
      $spamcom = isset($_POST['comment'])                ? $_POST['comment']                : null;
      $_POST['spam_confirmed'] = "請求: ". $request. "\n來路: ". $referer. "\nIP: ". $IP. "\n方式: ". $way. "\n內容: ". $spamcom. "\n -- 記錄成功 --";
    }
  }
  //處理
  function sink( $comment ) {
    if ( !emptyempty($_POST['spam_confirmed']) ) {
      if ( in_array( $comment['comment_type'], array('pingback', 'trackback') ) ) return $comment; //不管 Trackbacks/Pingbacks
      //方法一: 直接擋掉, 將 die(); 前面兩斜線刪除即可.
      //die();
      //方法二: 標記為 spam, 留在資料庫檢查是否誤判.
      add_filter('pre_comment_approved', create_function('', 'return "spam";'));
      $comment['comment_content'] = "[ 小牆判斷這是Spam! ]\n". $_POST['spam_confirmed'];
    }
    return $comment;
  }
}
$anti_spam = new anti_spam();
// -- END ----------------------------------------


?>

小牆v1.9

<?php
 /* -----------------------------------------------
 <;<小牆>> Anti-Spam v1.9 by Willin Kan.
 */
 //建立
 class anti_spam {
   function anti_spam() {
     if ( !is_user_logged_in() ) {
       add_action('template_redirect', array($this, 'w_tb'), 1);
       add_action('pre_comment_on_post', array($this, 'gate'), 1);
       add_action('preprocess_comment', array($this, 'sink'), 1);
     }
   }
   //設欄位
   function w_tb() {
     if ( is_singular() ) {
       ob_start(create_function('$input', 'return preg_replace("#textarea(.*?)name=([\"\'])comment([\"\'])(.+)/textarea>#",
       "textarea$1name=$2w$3$4/textarea><textarea name=\"comment\" cols=\"60\" rows=\"4\" style=\"display:none\"></textarea>", $input);') );
      }
   }
   //檢查
   function gate() {
     ( !emptyempty($_POST['w']) &;& emptyempty($_POST['comment']) ) ? $_POST['comment'] = $_POST['w'] : $_POST['spam_confirmed'] = 1;
   }
   //處理
   function sink( $comment ) {
     if ( !emptyempty($_POST['spam_confirmed']) ) {
       //方法一:直接擋掉, 將 die(); 前面兩斜線刪除即可.
       //die();
       //方法二:標記為spam, 留在資料庫檢查是否誤判.
       add_filter('pre_comment_approved', create_function('', 'return "spam";'));
       $comment['comment_content'] = "[ 小牆判斷這是Spam! ]\n" . $comment['comment_content'];
     }
     return $comment;
   }
}
$anti_spam = new anti_spam();
// -- END ----------------------------------------

参考：http://www.aircyan.com/system/no-plugin-anti-spam.html