评论回复自动通知

今天自己测试了下博客的评论系统，发现并不能提醒评论者我已经回复了，所以，去搜索了下，添加了这个功能。方法横简单，找到自己主题的functions.php文件，在最后添加如下代码，保存就完事了。

// 评论回应邮件通知
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)) {
    $wp_email = 'no-reply@' . preg_replace('#^www\.#', '', strtolower($_SERVER['SERVER_NAME']));
    $subject = '您在 [' . get_option("blogname") . '] 的留言有了新回复';
    $message = '
        <div style="-moz-border-radius: 5px;-webkit-border-radius: 5px;-khtml-border-radius: 5px;border-radius: 5px;background-color:white;border-top:2px solid #12ADDB;box-shadow:0 1px 3px #AAAAAA;line-height:180%;padding:0 15px 12px;width:500px;margin:50px auto;color:#555555;font-family:Century Gothic,Trebuchet MS,Hiragino Sans GB,微软雅黑,Microsoft Yahei,Tahoma,Helvetica,Arial,SimSun,sans-serif;font-size:12px;">
        <h2 style="border-bottom:1px solid #DDD;font-size:14px;font-weight:normal;padding:13px 0 10px 8px;"><span style="color: #12ADDB;font-weight: bold;">&gt;</span>您在 <a style="text-decoration:none;color: #12ADDB;" href="' . get_option('home') . '" rel="external nofollow" target = "_blank"  rel="external nofollow" target = "_blank"  rel="external nofollow" target = "_blank"  target="_blank" rel="noopener noreferrer">' . get_option('blogname') . '</a> 博客上的留言有回复啦！</h2><div style="padding:0 12px 0 12px;margin-top:18px"><p>亲爱的 ' . trim(get_comment($parent_id)->comment_author) . '， 您好！您曾在文章《' . get_the_title($comment->comment_post_ID) . '》上发表评论：</p>
        <p style="background-color: #f5f5f5;border: 0px solid #DDD;padding: 10px 15px;margin:18px 0">'. trim(get_comment($parent_id)->comment_content) . '</p><p>'. trim($comment->comment_author) .'给您的回复如下：</p><p style="background-color: #f5f5f5;border: 0px solid #DDD;padding: 10px 15px;margin:18px 0">' . trim($comment->comment_content) .'</p><p>您可以点击<a href="' . htmlspecialchars(get_comment_link($parent_id, array('type' => 'comment'))) . '" rel="external nofollow" target = "_blank" >查看回复的完整内容</a>，欢迎再次光临<a href="' . get_option('home') . '" rel="external nofollow" target = "_blank"  rel="external nofollow" target = "_blank"  rel="external nofollow" target = "_blank" >' . get_option('blogname') . '</a> 。</p>
        <p style="color: #000;background: #f5f5f5;font-size:11px;border: solid 1px #eee;padding: 2px 10px;">请注意：此邮件由 <a href="' . get_option('home') . '" rel="external nofollow" target = "_blank"  rel="external nofollow" target = "_blank"  rel="external nofollow" target = "_blank" >' . get_option('blogname') . '</a> 自动发送，请勿直接回复。<br />如果此邮件不是您请求的，请忽略并删除！</p></div></div>';
    $from = "From: \"" . get_option('blogname') . "\" <$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');
// -- END ----------------------------------------

教程来自于：小Z博客