WordPress展示最近更新过的文章，并用邮件通知评论过的用户

/** 
* WordPress展示最近更新过的文章 并通知评论过的用户 
* https://www.dujin.org/fenxiang/wp/9809.html 
*/ 
//展示最近更新过的文章 
function recently_updated_posts($num=10,$days=7) { 
 if( !$recently_updated_posts = get_option('recently_updated_posts') ) { 
 query_posts('post_status=publish&orderby=modified&posts_per_page=-1'); 
 $i=0; 
 while ( have_posts() && $i<$num ) : the_post(); 
 if (current_time('timestamp') - get_the_time('U') > 60*60*24*$days) { 
 $i++; 
 $the_title_value=get_the_title(); 
 $recently_updated_posts.='<li><a href="'.get_permalink().'" title="'.$the_title_value.'">' 
 .$the_title_value.'</a><span class="updatetime"><br />&raquo; 修改时间: ' 
 .get_the_modified_time('Y.m.d G:i').'</span></li>'; 
 } 
 endwhile; 
 wp_reset_query(); 
 if ( !empty($recently_updated_posts) ) update_option('recently_updated_posts', $recently_updated_posts); 
 } 
 $recently_updated_posts=($recently_updated_posts == '') ? '<li>None data.</li>' : $recently_updated_posts; 
 echo $recently_updated_posts; 
} 
 
function clear_cache_zww() { 
 update_option('recently_updated_posts', ''); // 清空 recently_updated_posts 
} 
add_action('save_post', 'clear_cache_zww'); // 新发表文章/修改文章时触发更新

<h3>Recently Updated Posts</h3> 
<ul> 
<?php if ( function_exists('recently_updated_posts') ) recently_updated_posts(8,15); ?> 
</ul>

/** 
 * WordPress展示最近更新过的文章 并通知评论过的用户 
 * https://www.dujin.org/fenxiang/wp/9809.html 
 */ 
//修改更新文章时邮件通知评论用户 
add_action( 'submitpost_box', 'lxtx_fo_submit_box'); 
function lxtx_fo_submit_box( ){ 
echo '<div id="fo_side-sortables" class="meta-box-sortables ui-sortable">'; 
echo '<div id="fo_submit_box" class="postbox ">'; 
echo '<div class="handlediv" title="点击以切换"><br></div>'; 
echo '<h3 class="hndle"><span>邮件通知</span></h3>'; 
echo '<div class="inside"><div class="submitbox">'; 
echo ' <div style="padding: 10px 10px 0;text-align: left;"><label class="selectit" title="慎用此功能，重要文章才勾选嘛，以免引起读者反感哈"><input type="checkbox" name="FO_emaill_report_user" value="true" title="勾选此项，将邮件通知本文所有评论者"/>邮通知本文所有评论者</label></div>'; 
echo '</div></div>'; 
echo '</div>'; 
echo '</div>'; 
} 
//开始 
add_action( 'publish_post', 'lxtx_fo_emaill_report_users' ); 
function lxtx_fo_emaill_report_users($post_ID) 
{ 
//如果未勾选保存，不进行任何操作 
if($_POST['FO_emaill_report_user'] != 'true'){ 
return; 
} 
 
//修订版本不通知，以免滥用 
if( wp_is_post_revision($post_ID) ){ 
return; 
} 
 
//获取wp数据操作类 
global $wpdb,$post; 
// 读数据库，获取文章的所有用户的email并且不重复 
$emailauthor != '你自己的邮箱'; 
$wp_user_emails = $wpdb->get_results("SELECT DISTINCT comment_author, comment_author_email FROM $wpdb->comments WHERE TRIM(comment_author_email) IS NOT NULL AND TRIM(comment_author_email) != '' AND TRIM(comment_author_email) != '$emailauthor' AND comment_post_ID = $post->ID"); 
 
// 获取博客名称 
$blogname = wp_specialchars_decode(get_option('blogname'), ENT_QUOTES); 
// 获取博客URL 
$blogurl = get_bloginfo("siteurl"); 
 
//文章链接 
$post_link = get_permalink($post_ID); 
//文章标题$post -> post_title 
$post_title = strip_tags($_POST['post_title']); 
//文章内容$post->post_content 
$post_content = strip_tags($_POST['post_content']); 
//文章摘要 
$output = preg_replace('/^(?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){0,0}((?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){0,200}).*/s','\1',$post_content).'......'; 
 
//邮件头，以免乱码 
$message_headers = "Content-Type: text/html; charset=\"utf-8\"\n"; 
// 邮件标题 
$subject = '您曾经来访过的《'.$post_title.'》文章更新通知。'; 
 
foreach ( $wp_user_emails as $wp_user_email ) 
{ 
// 邮件内容 
$message = ' 
<div style="MARGIN-RIGHT: auto; MARGIN-LEFT: auto;"> 
<strong style="line-height: 1.5; font-family:Microsoft YaHei;"> 
亲爱的'.$wp_user_email->comment_author.'： 
</strong> 
<p style="FONT-SIZE: 14px; PADDING-TOP: 6px"> 
您曾经来访过的《'.$post_title.'》有更新，博主觉得有必要通知您，希望不会骚扰到您。 
</p> 
<p style="FONT-SIZE: 14px; PADDING-TOP: 6px"> 
文章标题：<a title="'.$post_title.'" href="'.$post_link.'" target="_top">'.$post_title.'</a> 
<br/> 
文章摘要：'.$output.' 
</p> 
<p style="FONT-SIZE: 14px; PADDING-TOP: 6px"> 
您可以点击链接 
<a href="'.$blogurl.'" style="line-height: 1.5;">'.$blogname.'</a> 
> 
<a title="'.$post_title.'" href="'.$post_link.'" target="_top">'.$post_title.'</a> 
详细查看 
</p> 
<p style="font-size: 14px; padding-top: 6px; text-align: left;"> 
<span style="line-height: 1.5; color: rgb(153, 153, 153);"> 
来自： 
</span> 
<a href="'.$blogurl.'" style="line-height: 1.5;">'.$blogname.'</a> 
</p> 
<div style="font-size: 12px; border-top-color: rgb(204, 204, 204); border-top-width: 1px; border-top-style: solid; height: 35px; width: 500px; color: rgb(102, 102, 102); line-height: 35px; background-color: rgb(245, 245, 245);"> 
该邮件为系统发送邮件，请勿直接回复！如有打扰，请向博主留言反映。灰常感谢您的阅读！ 
</div> 
</div>'; 
wp_mail($wp_user_email->comment_author_email, $subject, $message, $message_headers); 
} 
}