最近很多用户问我,能否在WordPress主题中添加一个用户关注功能,答案是肯定的,那么WordPress如何实现用户关注功能?首先,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 } ?>

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