很多WordPress需要用到文章收藏的功能，又有用户不想使用WordPress插件，这时候就需要用到纯代码实现，那么WordPress如何实现文章收藏功能？首先将下面的代码放到您的functions.php文件中。
function post_shoucang(){
if(!get_current_user_id()){
exit(json_encode([\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’msg\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’=>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’请先登录才能收藏哦!\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’]));
}
$id = $_POST[\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”id\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”];
$meta = get_post_meta($id,\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’shoucang\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,true);
$shoucang1 = explode(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,get_post_meta($id,\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’shoucang\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,true));
$shoucang = array_filter($shoucang1);
$user = get_current_user_id();
if(in_array($user,$shoucang)){
foreach($shoucang as $k=>$v){
if($v==$user){
unset($shoucang[$k]);
}
}
update_post_meta($id, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’shoucang\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, implode(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”,\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”,$shoucang));
exit(json_encode([\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’msg\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’=>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’已取消收藏\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’]));
}else{
array_push($shoucang,$user);
update_post_meta($id, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’shoucang\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, implode(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”,\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”,$shoucang));
exit(json_encode([\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’msg\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’=>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’收藏成功\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’]));
}
}
add_action(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’wp_ajax_post_shoucang\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’post_shoucang\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’);
add_action(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’wp_ajax_nopriv_post_shoucang\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’post_shoucang\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’);
其次，是在文章页中放入下面的html代码（收藏按钮）:
<?php
$shoucang1 = explode(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,get_post_meta(get_the_ID(),\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’shoucang\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,true));
$shoucang = array_filter($shoucang1);
$user = get_current_user_id();
?>
<a class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”shoucang <?php if(in_array($user,$shoucang)){ foreach($shoucang as $k=>$v){if($v==$user){echo \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”on\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”;}}} ;?>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” data-id=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”<?php the_ID();?>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” href=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”javascript:;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”>
<span>收藏</span>
</a>
样式方面就自己定义吧，其中，如果文章已经收藏过了，会在收藏按钮的a标签上多一个on的类，你可以使用这个类定义收藏过的样式。最后，还需要有一段JS文件，你可以放到您的footer.php中。
<script> $(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’a.shoucang\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’).click(function(){
var id = $(this).data(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”id\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”);
$.ajax({
url: \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”/wp-admin/admin-ajax.php\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”,
type:\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’post\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,
dataType:\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’json\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,
data:{action:\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’post_shoucang\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,id:id},
success: function(data){
layer.alert(data.msg, function(){
location.reload();
});
}
});
});</script>
为了更好的体验效果，收藏成功以及取消成功的消息提示使用了layer这个jQuery弹出层插件，所以，您还需要在主题中引入这个框架的文件（下载地址），下载后把整个文件夹放到您的主题目录中，然后在主题头部引入layer.js
通过以上方法已经完成了对文章的收藏及取消收藏功能（只有登录用户才能收藏）。收藏后大家肯定还需要获取出来每个用户自己收藏的文章的列表，以往使用插件获取收藏列表的时候样式都是固定的，自定义起来就要改插件，但是使用上面的方法，获取收藏列表的时候你想展示什么样的列表就看你自己了。获取方法如下：
<?php
$paged = (get_query_var(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’paged\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’)) ? get_query_var(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’paged\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’) : 1;
$args=array(
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’cat\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => 5, // 分类ID，如果不需要限定是哪个分类，可以不写这个条件
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’showposts\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => 16,
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’paged\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ => $paged,
);
query_posts($args);
if(have_posts()) : while (have_posts()) : the_post();
?>
<?php
$shoucangmeta1 = explode(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,get_post_meta($id,\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’shoucang\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’,true));
$shoucangmeta = array_filter($shoucangmeta1);
?>
<?php if(in_array(get_current_user_id(),$shoucangmeta)){ ?>
<li>
<a class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”videolistbox\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” href=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”https://www.wpzt.net/<?php%20the_permalink();?>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” title=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”<?php the_title();?>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”>
<div class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”thumbbox\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”>
<?php $thumburl = wp_get_attachment_image_src( get_post_thumbnail_id(get_the_ID()), array(400,270));?>
<img class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”defaultthumb\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” src=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”https://www.wpzt.net/<?php%20echo%20$thumburl[0];?>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” alt=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”<?php the_title();?>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” title=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”<?php the_title();?>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”>
<i class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”videobutton fa fa-caret-square-o-right\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”></i>
</div>
<h3><?php the_title();?></h3>
<div class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”videolisttag\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”>
<span>
<i class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”fa fa-calendar\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” aria-hidden=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”true\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”></i>
<?php the_time(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’m,d\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’);?>
</span>
<span>
<i class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”fa fa-eye\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” aria-hidden=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”true\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”></i>
<?php post_views(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’, \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’ 次\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’); ?>
</span>
<div class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”clearfix\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”></div>
</div>
</a>
<a class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”posteditbutton shoucang\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” data-id=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”<?php the_ID();?>\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” href=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”javascript:;\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”>取消收藏</a>
</li>
<?php } ?>
<?php endwhile; else : ?>
<div class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”sp-mod-empty\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”>
<img src=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”https://www.wpzt.net/<?php%20bloginfo(\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’template_directory\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’);%20?>/images/empty.jpg\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\” class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”empty-images\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”>
<p class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”empty-txt\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”>您还没有收藏任何弹唱视频哦~</p>
</div>
<?php endif;?>
<div class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”clearfix\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”></div>
<div class=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”page_navi text-center\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”>
<?php par_pagenavi(9); ?>
</div>
<?php wp_reset_query(); ?>
仔细看上面的代码，其实就是普通的循环获取文章，只不过在循环中多了个判断，判断当前用户的id是否在获取到的文章的\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”shoucang\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\”这个字段里，如果在则显示出来。