/* 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\">%