比较实用的WordPress评论邮件自动通知功能。主要的目的在于提高回访性。如果有朋友去你的网站咨询问题，但是过后他可能忘记这回事，有可能就不了了之了，这时候有邮件回复通知就不会让他错过了。

实现评论邮件自动通知的功能只要把以下代码添加到functions.php即可，此方法仅限于Linux主机使用。

[code lang="php"]
//评论邮件自动通知
function comment_mail_notify($comment_id) {
$admin_email = get_bloginfo ('admin_email');
$comment = get_comment($comment_id);
$comment_author_email = trim($comment->comment_author_email);
$parent_id = $comment->comment_parent ? $comment->comment_parent : '';
$to = $parent_id ? trim(get_comment($parent_id)->comment_author_email) : '';
$spam_confirmed = $comment->comment_approved;
if (($parent_id != '') && ($spam_confirmed != 'spam') && ($to != $admin_email) && ($comment_author_email == $admin_email)) {
$wp_email = 'no-reply@' . preg_replace('#^www\.#', '', strtolower($_SERVER['SERVER_NAME']));
$subject = '您在 [' . get_option("blogname") . '] 的评论有新的回复';
$message = '

';
$message = convert_smilies($message);
$from = "From: \"" . get_option('blogname') . "\" <$wp_email>";
$headers = "$from\nContent-Type: text/html; charset=" . get_option('blog_charset') . "\n";
wp_mail( $to, $subject, $message, $headers );
}
}
add_action('comment_post', 'comment_mail_notify');
[/code]