修改PHP脚本使WordPress拦截垃圾评论的方法示例

/* refused spam */ 
function refused_spam_comments( $comment_data ) { 
$pattern = '/[一-龥]/u'; 
if(!preg_match($pattern,$comment_data['comment_content'])) { 
err('评论必须含中文！'); 
} 
return( $comment_data ); 
} 
add_filter('preprocess_comment','refused_spam_comments');

/* refused spam */ 
function refused_spam_comments( $comment_data ) { 
$pattern = '/[一-龥]/u'; 
if(!preg_match($pattern,$comment_data['comment_content'])) { 
wp_die('评论必须含中文！'); 
} 
return( $comment_data ); 
} 
add_filter('preprocess_comment','refused_spam_comments');

Order Deny,Allow 
Deny from xxx.xxx.xxx.xx 
Deny from xxx.xxx.xxx.xx

class anti_spam {
 //建立
 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=$2wall$3$4/textarea><textarea name=\"comment\" cols=\"50\" rows=\"4\" style=\"display:none\"></textarea>",$input);') );
 }
 }
 
 //檢查
 function gate() {
 ( !empty($_POST['wall']) && empty($_POST['comment']) ) ? $_POST['comment'] = $_POST['wall'] : $_POST['spam_confirmed'] = 1;
 }
 
 //處理
 function sink( $comment ) {
 if ( !empty($_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";'));
  /*
  $is_ping = in_array( $comment['comment_type'], array('pingback', 'trackback') );
  $comment['comment_content'] = ( $is_ping ) ?
  "◎ 這是 Pingback/Trackback, 小牆懷疑這可能是 Spam!\n" . $comment['comment_content'] :
  "[ 小牆判斷這是Spam! ]\n" . $comment['comment_content'];
  */
  // MG12 的處理方法
  $is_ping = in_array( $comment['comment_type'], array('pingback', 'trackback') );
  if(!$is_ping) {
  die();
  }
 }
 return $comment;
 }
}
new anti_spam();