如何让WordPress实现评论回复邮件提醒的功能？

根据自己的需要选择，将下面的代码添加到当前主题的functions.php文件中即可：

方法一：所有回复都发送邮件通知

默认所有填写了邮箱的评论都将发邮件提醒评论人，没有任何勾选设置。

/* comment_mail_notify v1.0 by willin kan. (所有回复都发邮件) */function comment_mail_notify($comment_id) {  $comment = get_comment($comment_id);  $parent_id = $comment->comment_parent ? $comment->comment_parent : '';  $spam_confirmed = $comment->comment_approved;  if (($parent_id != '') && ($spam_confirmed != 'spam')) {    $wp_email = 'no-reply@' . preg_replace('#^www.#', '', strtolower($_SERVER['SERVER_NAME'])); //e-mail 发出点, no-reply 可改为可用的 e-mail.    $to = trim(get_comment($parent_id)->comment_author_email);    $subject = '您在 [' . get_option("blogname") . '] 的留言有了回复';    $message = '    <div style="background-color:#eef2fa; border:1px solid #d8e3e8; color:#111; padding:0 15px; -moz-border-radius:5px; -webkit-border-radius:5px; -khtml-border-radius:5px;">      <p>' . trim(get_comment($parent_id)->comment_author) . ', 您好!</p>      <p>您曾在《' . get_the_title($comment->comment_post_ID) . '》的留言:<br />'       . trim(get_comment($parent_id)->comment_content) . '</p>      <p>' . trim($comment->comment_author) . ' 给您的回复:<br />'       . trim($comment->comment_content) . '<br /></p>      <p>您可以点击 查看回复完整內容</p>      <p>欢迎再度光临 ' . get_option('blogname') . '</p>      <p>(此邮件由系统自动发送，请勿回复.)</p>    </div>';      $from = "From: "" . get_option('blogname') . "" <$wp_email>";      $headers = "$fromnContent-Type: text/html; charset=" . get_option('blog_charset') . "n";      wp_mail( $to, $subject, $message, $headers );  }}add_action('comment_post', 'comment_mail_notify');

方法二：让访客自己选择是否邮件通知

在评论框下方显示一个勾选框，让评论人自己决定是否接收邮件通知。

function comment_mail_notify($comment_id) {  $admin_notify = '1'; // admin 要不要收回复通知 ( '1'=要 ; '0'=不要 )  $admin_email = get_bloginfo ('admin_email'); // $admin_email 可改为你指定的 e-mail.  $comment = get_comment($comment_id);  $comment_author_email = trim($comment->comment_author_email);  $parent_id = $comment->comment_parent ? $comment->comment_parent : '';  global $wpdb;  if ($wpdb->query("Describe {$wpdb->comments} comment_mail_notify") == '')    $wpdb->query("ALTER TABLE {$wpdb->comments} ADD COLUMN comment_mail_notify TINYINT NOT NULL DEFAULT 0;");  if (($comment_author_email != $admin_email && isset($_POST['comment_mail_notify'])) || ($comment_author_email == $admin_email && $admin_notify == '1'))    $wpdb->query("UPDATE {$wpdb->comments} SET comment_mail_notify='1' WHERE comment_ID='$comment_id'");  $notify = $parent_id ? get_comment($parent_id)->comment_mail_notify : '0';  $spam_confirmed = $comment->comment_approved;  if ($parent_id != '' && $spam_confirmed != 'spam' && $notify == '1') {    $wp_email = 'no-reply@' . preg_replace('#^www.#', '', strtolower($_SERVER['SERVER_NAME'])); // e-mail 发出点, no-reply 可改为可用的 e-mail.    $to = trim(get_comment($parent_id)->comment_author_email);    $subject = '您在 [' . get_option("blogname") . '] 的留言有了回复';    $message = '    <div style="background-color:#eef2fa; border:1px solid #d8e3e8; color:#111; padding:0 15px; -moz-border-radius:5px; -webkit-border-radius:5px; -khtml-border-radius:5px;">      <p>' . trim(get_comment($parent_id)->comment_author) . ', 您好!</p>      <p>您曾在《' . get_the_title($comment->comment_post_ID) . '》的留言:<br />'       . trim(get_comment($parent_id)->comment_content) . '</p>      <p>' . trim($comment->comment_author) . ' 给您的回复:<br />'       . trim($comment->comment_content) . '<br /></p>      <p>您可以点击查看回复的完整內容</p>      <p>还要再度光临 ' . get_option('blogname') . '</p>      <p>(此邮件由系统自动发送，请勿回复.)</p>    </div>';         $from = "From: "" . get_option('blogname') . "" <$wp_email>";         $headers = "$fromnContent-Type: text/html; charset=" . get_option('blog_charset') . "n";         wp_mail( $to, $subject, $message, $headers );  }}add_action('comment_post', 'comment_mail_notify');/* 自动加勾选栏 */function add_checkbox() {  echo '<input type="checkbox" name="comment_mail_notify" id="comment_mail_notify" value="comment_mail_notify" checked="checked" style="margin-left:20px;" /><label for="comment_mail_notify">有人回复时邮件通知我</label>';}add_action('comment_form', 'add_checkbox');

方法三：让博客管理员决定什么情况下发邮件

调整下面的代码，选择发送回复邮件

/* comment_mail_notify v1.0 by willin kan. (无勾选栏) */function comment_mail_notify($comment_id) {  $admin_email = get_bloginfo ('admin_email'); // $admin_email 可改为你指定的 e-mail.  $comment = get_comment($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 == $admin_email)) {    /* 上面的判断式,决定发出邮件的必要条件:    ($parent_id != '') && ($spam_confirmed != 'spam'): 回复的, 而且不是 spam 才可发, 必需!!    ($to != $admin_email) : 不发给 admin.    ($comment_author_email == $admin_email) : 只有 admin 的回复才可发.    可视个人需修改上面的条件.    */    $wp_email = 'no-reply@' . preg_replace('#^www.#', '', strtolower($_SERVER['SERVER_NAME'])); // e-mail 发出点, no-reply 可改为可用的 e-mail.    $subject = '您在 [' . get_option("blogname") . '] 的留言有了回复';    $message = '    <div style="background-color:#eef2fa; border:1px solid #d8e3e8; color:#111; padding:0 15px; -moz-border-radius:5px; -webkit-border-radius:5px; -khtml-border-radius:5px;">      <p>' . trim(get_comment($parent_id)->comment_author) . ', 您好!</p>      <p>您曾在《' . get_the_title($comment->comment_post_ID) . '》的留言:<br />'       . trim(get_comment($parent_id)->comment_content) . '</p>      <p>' . trim($comment->comment_author) . ' 给您的回复:<br />'       . trim($comment->comment_content) . '<br /></p>      <p>您可以点击 查看回复的完整內容</p>      <p>还要再度光临 ' . get_option('blogname') . '</p>      <p>(此邮件由系统自动发送，请勿回复.)</p>    </div>';         $from = "From: "" . get_option('blogname') . "" <$wp_email>";         $headers = "$fromnContent-Type: text/html; charset=" . get_option('blog_charset') . "n";         wp_mail( $to, $subject, $message, $headers );  }}add_action('comment_post', 'comment_mail_notify');