WordPress默认支持Gravatar 头像，然而因为网络的原因，这个头像加载就会比较困难，所以国内用户使用的就会比较少。但是如果不提供头像上传功能，对于开启了用户中心的网站又不太友好，所以目前一般通过一些插件可以来实现这个功能，今天wpmee小编就与大家一起探讨一下纯代码WordPress如何添加用户头像上传功能？

新建 fn_local_avatar.php 文件

所有内容都写在一个文件了，具体内容如下：

<?php

function _edit_user_avatar_profile($user){

$avatar = get_user_meta($user->ID, ‘avatar’, true);

$user_cap = current_user_can( ‘upload_files’ ) ? ‘YES’ : ‘NO’;

$avatar_default = $avatar ? $avatar : get_template_directory_uri().’/img/avatar-default.png’;

?>

<h2>用户头像</h2>

<table class=”form-table” cellspacing=”0″>

<tbody>

<tr id=”user_avatar” class=”user-avatar” valign=”center”>

<th scope=”row”><label for=”avatar”>自定义头像</label></th>

<td class=”user-avatar-img”>

<img id=”user-avatar-new” src=”<?php echo $avatar_default; ?>” alt=”本地头像”/>

</td>

<td class=”user-avatar-wrap”>

<input type=”hidden” name=”avatar” id=”avatar” class=”regular-text” value=”<?php echo $avatar; ?>”>

<?php if ( current_user_can( ‘upload_files’ ) ) { ?>

<!– 有 upload_files 权限媒体库选择图片文件 –>

<span class=”desc”>在媒体库中选择一个图片作为头像：</span>

<div class=”user-avatar-btn wp-media-buttons”>

<div data-user_cap=”<?php echo $user_cap; ?>” data-item_type=”url” class=”media-library-upload button add_media”>添加图片</div>

</div>

<?php } ?>

<!– 无 upload_files 权限计算机上传图片文件 –>

<span class=”desc”>从计算机中上传一张图片作为头像：</span><br />

<div class=”user-avatar-btn wp-media-buttons”>

<input type=”file” name=”local-avatar-upload” id=”local-avatar-upload” class=”local-avatar-upload” />

<?php wp_nonce_field( ‘local-avatar-upload’, ‘local-avatar-upload_nonce’ ); ?>

</div>

</td>

</tr>

</tbody>

</table>

<?php

}

add_action(‘show_user_profile’, ‘_edit_user_avatar_profile’, 1);

add_action(‘edit_user_profile’, ‘_edit_user_avatar_profile’, 1);

// 媒体库选择文件更新 avatar 值(用户有 upload_files 权限)

function _edit_user_avatar_profile_update($user_id){

if(current_user_can(‘edit_users’) || get_current_user_id() == $user_id){

$avatar = $_POST[‘avatar’] ? : ”;

if($avatar){

update_user_meta($user_id, ‘avatar’, $avatar);

}else{

delete_user_meta($user_id, ‘avatar’);

}

}

}

add_action(‘personal_options_update’,’_edit_user_avatar_profile_update’);

add_action(‘edit_user_profile_update’,’_edit_user_avatar_profile_update’);

// 用户上传文件更新 avatar (用户无 upload_files 权限)

function _upload_user_avatar_profile_update($user_id){

$user_id = get_current_user_id();

// check nonces

if( empty( $_POST[‘local-avatar-upload_nonce’] ) || ! wp_verify_nonce( $_POST[‘local-avatar-upload_nonce’], ‘local-avatar-upload’ ) ){

return;

}

// 判断 media_handle_upload() 是否存在

if ( ! function_exists( ‘media_handle_upload’ ) ){

require_once( ABSPATH . ‘wp-admin/includes/media.php’ );

}

// 自定义头像上传路径（ Upload 文件夹下的路径 ）

function avatar_upload_dir( $dir ) {

$sub_dir = get_currentuserinfo()->ID;

return array(

‘path’ => $dir[‘basedir’] . ‘/avatars/’ . $sub_dir,

‘url’ => $dir[‘baseurl’] . ‘/avatars/’ . $sub_dir,

‘subdir’ => ‘/avatars/’ . $sub_dir,

) + $dir;

}

add_filter( ‘upload_dir’, ‘avatar_upload_dir’);

$avatar_id = media_handle_upload( ‘local-avatar-upload’, 0, array(), array(

‘mimes’ => array(

‘jpg|jpeg|jpe’ => ‘image/jpeg’,

‘gif’ => ‘image/gif’,

‘png’ => ‘image/png’,

),

‘test_form’ => false

));

remove_filter( ‘upload_dir’, ‘avatar_upload_dir’ );

if(!is_numeric($avatar_id)){ return; } // 未上传文件的话直接返回

if ( is_wp_error( $avatar_id ) ) { //

// 图片上传错误处理信息

function user_avatar_upload_errors( WP_Error $errors ) {

$error_message = function_exists(‘get_error_message’) ? $avatar_id->get_error_message() : “未知错误，请仔细检查文件！”;

$avatar_upload_error = ‘<strong>’ . __( ‘Avatar 头像上传错误:’.gettype($avatar_id) , ‘local-avatar-upload’ ) . ‘</strong> ‘ . esc_html( $error_message );

$errors->add( ‘avatar_error’, $avatar_upload_error );

}

add_action( ‘user_profile_update_errors’, ‘user_avatar_upload_errors’ );

return;

}else{

$avatar_url = wp_get_attachment_image_src( $avatar_id, ‘full’)[0];

update_user_meta($user_id, ‘avatar’, $avatar_url);

}

}

add_action( ‘personal_options_update’, ‘_upload_user_avatar_profile_update’ );

add_action( ‘edit_user_profile_update’, ‘_upload_user_avatar_profile_update’ );

// 确保配置文件表单具有正确的编码类型, 一般默认的 enctype=”application/x-www-form-urlencoded”;不能用于上传文件

function user_edit_form_tag() {

echo ‘enctype=”multipart/form-data”‘;

}

add_action( ‘user_edit_form_tag’, ‘user_edit_form_tag’ );

// 用户有上传权限调用 wp.media 库

function admin_enqueue_scripts(){

if ( current_user_can( ‘upload_files’ ) ){

wp_enqueue_media();

}

}

add_action(‘admin_enqueue_scripts’, ‘admin_enqueue_scripts’);

add_action(‘admin_footer’, function(){

?>

<style type=”text/css”>

.form-table .user-avatar-img{

display: inline-block;

width: 120px;

height: 120px;

margin: 0;

padding: 0;

border: 1px solid #999;

border-radius: 9px;

overflow: hidden;

}

.form-table .user-avatar-img img{

width: 100%;

height: 100%;

}

.form-table .user-avatar-wrap {

display: inline-block;

width: auto;

height: 110px;

margin: 0;

padding: 5px 20px;

border: 0;

}

.form-table .user-avatar-wrap .user-avatar-btn{

width: 80px;

margin: 5px 0;

padding: 0;

border: 0;

font-size: 14px;

}

</style>

<script>

(function($){

// 有 upload_files 权限媒体库选择图片文件

$(‘body’).on(‘click’, ‘.media-library-upload’, function(e) {

// 阻止事件默认行为

e.preventDefault();

var user_cap = $(this).data(‘user_cap’);

if (user_cap==”NO”){alert(“抱歉，你没有上传图片的权限！”)}

var item_type = $(this).data(‘item_type’);

var input_tag = $(‘#avatar’);

var img_tag = $(‘#user-avatar-new’);

//唤起 WordPress 默认媒体上传

custom_uploader = wp.media.frames.local_avatar_frame = wp.media({

title: ‘选择图片’,

library: { type: ‘image’ },

button: { text: ‘选择图片’ },

multiple: false

});

wp.media.frames.local_avatar_frame.on(‘select’, function() {

var attachment = wp.media.frames.local_avatar_frame.state().get(‘selection’).first().toJSON();

var img_value = (item_type == ‘url’) ? attachment.url : attachment.id;

// 将图像路径赋值给 input 的 value

input_tag.val(img_value);

img_tag.attr(‘src’, img_value);

});

wp.media.frames.local_avatar_frame.open();

});

// 无 upload_files 权限本地上传图片文件

$(‘body’).on(‘change’, ‘.local-avatar-upload’, function(e) {

var file = this.files[0];

// 限制文件类型

var fileType = /^image//;

if ( !fileType.test(file.type) ) {

alert(“请选择一张图片！”);

$(this).val(”)

return;

}

//限制文件大小

var imgSize = file.size;

if(imgSize> 200*1024){

alert(‘上传的图片不得大于200KB！’);

$(this).val(”)

return false;

}

// 预览图片

filePath = URL.createObjectURL(file);

$(‘#user-avatar-new’).attr(‘src’, filePath);

});

})(jQuery)

</script>

<?php

});

代码中基本上都做了注释了，方便大家理解，有需要的小伙伴可以在此基础上做些修改。

引入 fn_local_avatar.php

将代码丢到主题目录下，然后在主题 functions.php 中直接引入即可，引入代码如下，注意修改路径！

// 后台自定义上传头像

require get_template_directory() . ‘/functions/fn_local_avatar.php’;

以上就是wpmee小编与大家一起探讨WordPress添加用户头像上传功能方法，希望能够帮助到大家。