我正在申请this tutorial 到我的博客。我正在使用Woothemes\'Bueno Theme .

我正在将此代码添加到主题的函数中。php文件：

function ymc_add_meta_settings($comment_id) {
  add_comment_meta(
    $comment_id, 
    \'mailchimp_subscribe\', 
    $_POST[\'mailchimp_subscribe\'], 
    true
  );
}
add_action(\'comment_post\', \'ymc_add_meta_settings\', 1);

function ymc_subscription_add( $cid, $comment ) {
  $cid = (int) $cid;

  if ( !is_object($comment) )
    $comment = get_comment($cid);

  if ( $comment->comment_karma == 0 ) {
   $subscribe = get_comment_meta($cid, \'mailchimp_subscribe\', true);
if ( $subscribe == \'on\' ) {
update_comment_meta($cid, \'mailchimp_subscribe\', \'off\');

/////////////////////////////////////
///////MailChimp////////////////////
///////////////////////////////////
  $apikey   = \'MYAPIKEY-us2\';
$listid   =  \'MYLISTID\';
$endpoint   = \'http://us2.api.mailchimp.com/1.3/?output=php\';

$request   = array(
  \'apikey\' => $apikey,
  \'id\' => $listid,
  \'email_address\' => strtolower( $comment->comment_author_email ),
  \'double_optin\' => true,
  \'merge_vars\' => array(
    \' <merge tag for name> \' => $comment->comment_author,
    \'OPTIN_IP\' => $comment->comment_author_IP,
  )
);
$result = wp_remote_post(
  $endpoint.\'&method=listSubscribe\', 
  array( \'body\' => json_encode($request) ) 
);
/////////////////////////////////////
///////MailChimp  Ended////////////////////
///////////////////////////////////



}
  }
}
add_action(\'comment_approved_\',\'ymc_subscription_add\',10,1);
add_action(\'comment_post\', \'ymc_subscription_add\', 60,1);

此外，此代码还添加到注释中。php主题文件（如下</form>) :

<input style="width: auto;" type="checkbox" name="mailchimp_subscribe"   id="mailchimp_subscribe"/>
<label for="mailchimp_subscribe">
Subscribe
</label>
</p>

但当我试图发送评论时，我遇到了以下错误：

Warning: Missing argument 2 for ymc_subscription_add() in /home/content/blabla/themes/bueno/functions.php on line 36

Warning: Cannot modify header information - headers already sent by (output started at /home/content/blabla/themes/bueno/functions.php:36) in /home/blabla/html/wp-comments-post.php on line 95

Warning: Cannot modify header information - headers already sent by (output started at /home/blabla/html/wp-content/themes/bueno/functions.php:36) in /home/content/blabla/wp-comments-post.php on line 96

Warning: Cannot modify header information - headers already sent by (output started at /home/blabla/html/wp-content/themes/bueno/functions.php:36) in /home/content/blabla/wp-comments-post.php on line 97

Warning: Cannot modify header information - headers already sent by (output started at /home/contentblabla/html/wp-content/themes/bueno/functions.php:36) in /home/content/blabla/wp-includes/pluggable.php on line 897

add_action(\'comment_approved_\',\'ymc_subscription_add\', 10, 2);
add_action(\'comment_post\', \'ymc_subscription_add\', 60, 2);