Using WordPress ‘comment_moderation_headers’ PHP filter

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The comment_moderation_headers WordPress PHP filter allows you to modify the headers for the comment moderation email.

Usage

add_filter('comment_moderation_headers', 'my_custom_comment_moderation_headers', 10, 2);

function my_custom_comment_moderation_headers($message_headers, $comment_id) {
  // your custom code here
  return $message_headers;
}

Parameters

  • $message_headers: string – Headers for the comment moderation email.
  • $comment_id: int – Comment ID.

More information

See WordPress Developer Resources: comment_moderation_headers

Examples

Add custom CC and BCC

Add a custom CC and BCC email address to the comment moderation email headers.

function add_cc_bcc_to_comment_moderation_email($headers, $comment_id) {
  $headers .= "CC: [email protected]\r\n";
  $headers .= "BCC: [email protected]\r\n";
  return $headers;
}

add_filter('comment_moderation_headers', 'add_cc_bcc_to_comment_moderation_email', 10, 2);

Change Reply-To address

Change the Reply-To address in the comment moderation email headers.

function change_reply_to_address($headers, $comment_id) {
  $headers .= "Reply-To: [email protected]\r\n";
  return $headers;
}

add_filter('comment_moderation_headers', 'change_reply_to_address', 10, 2);

Add X-Priority header

Add an X-Priority header to set email priority for the comment moderation email.

function add_x_priority_header($headers, $comment_id) {
  $headers .= "X-Priority: 1\r\n";
  return $headers;
}

add_filter('comment_moderation_headers', 'add_x_priority_header', 10, 2);

Change content type

Change the content type of the comment moderation email to HTML.

function change_content_type_to_html($headers, $comment_id) {
  $headers .= "Content-Type: text/html; charset=UTF-8\r\n";
  return $headers;
}

add_filter('comment_moderation_headers', 'change_content_type_to_html', 10, 2);

Add custom header

Add a custom header to the comment moderation email.

function add_custom_header($headers, $comment_id) {
  $headers .= "X-Custom-Header: custom-value\r\n";
  return $headers;
}

add_filter('comment_moderation_headers', 'add_custom_header', 10, 2);