将下面的代码放到您的functions.php文件中。
function wpdiary_user_guanzhu(){
if(!get_current_user_id()){
exit(json_encode([‘msg’=>’请登录!’]));
}
if( $_POST[‘user’]==get_current_user_id()){
exit(json_encode([‘msg’=>’你不能关注自己!’]));
}
$user = $_POST[‘user’];
$meta = get_user_meta(get_current_user_id(),’guanzhu’,true);
$bguanzhu1 = explode(‘,’,get_user_meta($user,’bguanzhu’,true));
$bguanzhu = array_filter($bguanzhu1);
$guanzhu1 = explode(‘,’,get_user_meta(get_current_user_id(),’guanzhu’,true));
$guanzhu = array_filter($guanzhu1);
if(in_array($user,$guanzhu)){
foreach($guanzhu as $k=>$v){
if($v==$user){
unset($guanzhu[$k]);
}
}
foreach($bguanzhu as $k=>$v){
if($v==get_current_user_id()){
unset($bguanzhu[$k]);
}
}
update_user_meta(get_current_user_id(),’guanzhu’,implode(“,”,$guanzhu));
update_user_meta($user,’bguanzhu’,implode(“,”,$bguanzhu));
exit(json_encode([‘msg’=>’取消成功!’]));
}else{
array_push($guanzhu,$user);
array_push($bguanzhu,get_current_user_id());
update_user_meta(get_current_user_id(),’guanzhu’,implode(“,”,$guanzhu));
update_user_meta($user,’bguanzhu’,implode(“,”,$bguanzhu));
exit(json_encode([‘msg’=>’关注成功!’]));
}
}
add_action(‘wp_ajax_guanzhu’,’wpdiary_user_guanzhu’);
add_action(‘wp_ajax_nopriv_guanzhu’,’wpdiary_user_guanzhu’);
//获取指定用户关注数量
function get_wpdiary_guanzhu_count($authorID){
$meta = get_user_meta($authorID,’guanzhu’,true);
if($meta){
$guanzhu = explode(“,”,get_user_meta($authorID,’guanzhu’,true));
return count($guanzhu);
}else{
return 0;
}
}
//获取指定用户被关注数量
function get_wpdiary_bguanzhu_count($authorID){
$meta = get_user_meta($authorID,’bguanzhu’,true);
if($meta){
$bguanzhu = explode(“,”,get_user_meta($authorID,’bguanzhu’,true));
return count($bguanzhu);
}else{
return 0;
}
}
其次,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:http://res.layui.com/static/download/layer/layer-v3.1.1.zip),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,并将下面的JS代码放到您的footer.php中。
<script>
$(‘a.addfollow’).click(function(){
var user = $(this).attr(‘user’);
$.ajax({
url: “/wp-admin/admin-ajax.php”,
type:’post’,
dataType:’json’,
data:{action:’guanzhu’,user:user},
success: function(data){
layer.alert(data.msg, function(){
location.reload();
});
}
});
});
</script>
第三,将关注按钮放到您需要放的地方,比如用户列表中或作者存档页,关注按钮代码如下:
<?php
$meta = get_user_meta(get_current_user_id(),’guanzhu’,true);
$user = ‘要被关注的用户的ID’
if($meta){
$guanzhu = explode(‘,’,$meta);
}else{
$guanzhu = array();
}
if(in_array($user,$guanzhu)){?>
<a href=”javascript:;” user=”<?php echo $user;?>” class=”addfollow focus-link”>+取消关注</a>
<?php }else{?>
<a href=”javascript:;” user=”<?php echo $user;?>” class=”addfollow focus-link”>+ 关注</a>
<?php }?>
第四,获取指定用户关注和被关注数量:
<?php echo get_wpdiary_guanzhu_count(‘用户ID’);?>//获取指定用户关注数量
<?php echo get_wpdiary_bguanzhu_count(‘用户ID’);?>//获取指定用户被关注数量
第五,如何获取当前登录用户关注的用户的列表:
<?php
$user_id = get_current_user_id();//当前登录用户id,也可以指定为某个ID的用户,这样获取到的就是指定ID的用户的关注列表
$meta = get_user_meta($user_id,’guanzhu’,true);
$guanzhulist = explode(‘,’,$meta );
$users = get_users(array(‘include’=>$guanzhulist));
?>
<?php foreach($users as $user){ ?>
<li class=”pic-btn-li”>
<div class=”li-pic”>
<a href=”https://www.wpzt.net/<?php%20echo%20get_author_posts_url(%20$user->ID);%20?>/?userid=<?php%20echo%20$user->ID;?>” target=”_blank” class=”li-link”>
<?php echo get_avatar($user->ID);?>
</a>
</div>
<div class=”li-dec”>
<p class=”dec-name”>
<a href=”https://www.wpzt.net/<?php%20echo%20get_author_posts_url(%20$user->ID);%20?>/?userid=<?php%20echo%20$user->ID;?>” target=”_blank” class=”dec-name-link”><?php echo $user->nickname;?></a>
</p>
<p class=”dec-sub”>
<span class=”dec-fans”>粉丝 <?php echo get_wpdiary_bguanzhu_count($user->ID);?></span>
</p>
</div>
<a href=”javascript:;” user=”<?php echo $user->ID;?>” class=”addfollow sp-mod-button” title=”关注他”>取消</a>
</li>
<?php } ?>
第六,获取关注过当前登录用户的列表(被关注列表,也可以说是粉丝列表):
<?php
$user_id = get_current_user_id();//当前登录用户id,也可以指定为某个ID的用户,这样获取到的就是关注过指定ID的用户列表(粉丝列表)
$bguanzhu = get_user_meta($user_id,’bguanzhu’,true);
$fanslist = explode(‘,’,$bguanzhu );
$fans = get_users(array(‘include’=>$fanslist));
?>
<?php foreach($fans as $fensi){ ?>
<li class=”pic-btn-li”>
<div class=”li-pic”>
<a href=”https://www.wpzt.net/<?php%20echo%20get_author_posts_url(%20$fensi->ID);%20?>/?userid=<?php%20echo%20$fensi->ID;?>” target=”_blank” class=”li-link”>
<?php echo get_avatar($fensi->ID);?>
</a>
</div>
<div class=”li-dec”>
<p class=”dec-name”>
<a href=”https://www.wpzt.net/<?php%20echo%20get_author_posts_url(%20$fensi->ID);%20?>/?userid=<?php%20echo%20$fensi->ID;?>” target=”_blank” class=”dec-name-link”><?php echo $fensi->nickname;?></a>
</p>
<p class=”dec-sub”>
<span class=”dec-fans”>粉丝 <?php echo get_wpdiary_bguanzhu_count($fensi->ID);?></span>
</p>
</div>
<?php
$meta = get_user_meta(get_current_user_id(),’guanzhu’,true);
$user = $fensi->ID;
if($meta){
$guanzhu = explode(‘,’,get_user_meta(get_current_user_id(),’guanzhu’,true));
}else{
$guanzhu = array();
}
if(in_array($user,$guanzhu)){?>
<a href=”javascript:;” user=”<?php echo $fensi->ID;?>” class=”addfollow sp-mod-button” title=”取消关注”>已互关</a>
<?php }else{?>
<a href=”javascript:;” user=”<?php echo $fensi->ID;?>” class=”addfollow sp-mod-button” title=”关注他”>关注他</a>
<?php }?>
</li>
<?php } ?>