使用WordPress建站的朋友应该知道,WordPress本身是没有上传自定义头像功能的,如果要更换头像,步骤是非常麻烦的。
而在我们开发一款WordPress主题中,特别是多用户的主题,让注册用户可以自定义上传头像是非要有必要的;那么我们是否能在WordPress后台添加一个用户自定义上传头像的功能?
答案是可以的。下面分享两种用户自定义上传头像方法。
1、使用Simple Local Avatars插件
站长可以在WordPress后台-插件-搜索插件,直接搜索插件Simple Local Avatars进行在线安装,启用之后可以在仪表盘-用户-我的个人资料进行头像设置。
2、纯代码实现
下载Simple Local Avatars插件后,我们会发现整个WordPress插件也就一个文件,我们完全可以将插件整合进WordPress主题,这样就可以少使用一个插件。
插件下载:
链接: https://pan.baidu.com/s/1XSWz3d1D2IKuqICJkGON_w 提取码: i173
https://pan.baidu.com/s/1hsxhile
插件代码:
<?php /** Plugin Name: Simple Local Avatars Plugin URI: http://get10up.com/plugins/simple-local-avatars-wordpress/ Description: Adds an avatar upload field to user profiles if the current user has media permissions. Generates requested sizes on demand just like Gravatar! Simple and lightweight. Version: 1.3.1 Author: Jake Goldman (10up LLC), Oomph Inc Author URI: http://get10up.com Plugin: Copyright 2011 Jake Goldman (email : jake@get10up.com) This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA NOTE: Previous versions may have accidentally and incorrectly attributed the copyright to employers of Mr. Goldman. While credit is given to all contributors to the current version, including Mr. Goldman's employers, the copyright belongs - and has always belonged - to Mr. Goldman, personally. */ /** * add field to user profiles */ class Simple_Local_Avatars { private $user_id_being_edited; public function __construct() { add_filter( 'get_avatar', array( $this, 'get_avatar' ), 10, 5 ); add_action( 'admin_init', array( $this, 'admin_init' ) ); add_action( 'show_user_profile', array( $this, 'edit_user_profile' ) ); add_action( 'edit_user_profile', array( $this, 'edit_user_profile' ) ); add_action( 'personal_options_update', array( $this, 'edit_user_profile_update' ) ); add_action( 'edit_user_profile_update', array( $this, 'edit_user_profile_update' ) ); add_filter( 'avatar_defaults', array( $this, 'avatar_defaults' ) ); } public function get_avatar( $avatar = '', $id_or_email, $size = 96, $default = '', $alt = false ) { if ( is_numeric($id_or_email) ) $user_id = (int) $id_or_email; elseif ( is_string( $id_or_email ) && ( $user = get_user_by( 'email', $id_or_email ) ) ) $user_id = $user->ID; elseif ( is_object( $id_or_email ) && ! empty( $id_or_email->user_id ) ) $user_id = (int) $id_or_email->user_id; if ( empty( $user_id ) ) return $avatar; $local_avatars = get_user_meta( $user_id, 'simple_local_avatar', true ); if ( empty( $local_avatars ) || empty( $local_avatars['full'] ) ) return $avatar; $size = (int) $size; if ( empty( $alt ) ) $alt = get_the_author_meta( 'display_name', $user_id ); // generate a new size if ( empty( $local_avatars[$size] ) ) { $upload_path = wp_upload_dir(); $avatar_full_path = str_replace( $upload_path['baseurl'], $upload_path['basedir'], $local_avatars['full'] ); $image_sized = image_resize( $avatar_full_path, $size, $size, true ); // deal with original being >= to original image (or lack of sizing ability) $local_avatars[$size] = is_wp_error($image_sized) ? $local_avatars[$size] = $local_avatars['full'] : str_replace( $upload_path['basedir'], $upload_path['baseurl'], $image_sized ); // save updated avatar sizes update_user_meta( $user_id, 'simple_local_avatar', $local_avatars ); } elseif ( substr( $local_avatars[$size], 0, 4 ) != 'http' ) { $local_avatars[$size] = home_url( $local_avatars[$size] ); } $author_class = is_author( $user_id ) ? ' current-author' : '' ; $avatar = "<img alt='" . esc_attr( $alt ) . "' src='" . $local_avatars[$size] . "' class='avatar avatar-{$size}{$author_class} photo' height='{$size}' width='{$size}' />"; return apply_filters( 'simple_local_avatar', $avatar ); } public function admin_init() { //load_plugin_textdomain( 'simple-local-avatars', false, dirname( plugin_basename( __FILE__ ) ) . '/localization/' ); register_setting( 'discussion', 'simple_local_avatars_caps', array( $this, 'sanitize_options' ) ); add_settings_field( 'simple-local-avatars-caps', __('上传头像权限','simple-local-avatars'), array( $this, 'avatar_settings_field' ), 'discussion', 'avatars' ); } public function sanitize_options( $input ) { $new_input['simple_local_avatars_caps'] = empty( $input['simple_local_avatars_caps'] ) ? 0 : 1; return $new_input; } public function avatar_settings_field( $args ) { $options = get_option('simple_local_avatars_caps'); echo ' <label for="simple_local_avatars_caps"> <input type="checkbox" name="simple_local_avatars_caps" id="simple_local_avatars_caps" value="1" ' . @checked( $options['simple_local_avatars_caps'], 1, false ) . ' /> ' . __('仅具有头像上传权限的用户具有设置本地头像权限(作者及更高等级角色)。','simple-local-avatars') . ' </label> '; } public function edit_user_profile( $profileuser ) { ?> <h3><?php _e( '头像','simple-local-avatars' ); ?></h3> <table class="form-table"> <tr> <th><label for="simple-local-avatar"><?php _e('上传头像','simple-local-avatars'); ?></label></th> <td style="width: 50px;" valign="top"> <?php echo get_avatar( $profileuser->ID ); ?> </td> <td> <?php $options = get_option('simple_local_avatars_caps'); if ( empty($options['simple_local_avatars_caps']) || current_user_can('upload_files') ) { do_action( 'simple_local_avatar_notices' ); wp_nonce_field( 'simple_local_avatar_nonce', '_simple_local_avatar_nonce', false ); ?> <input type="file" name="simple-local-avatar" id="simple-local-avatar" /><br /> <?php if ( empty( $profileuser->simple_local_avatar ) ) echo '<span class="description">' . __('尚未设置本地头像,请点击“浏览”按钮上传本地头像。','simple-local-avatars') . '</span>'; else echo ' <input type="checkbox" name="simple-local-avatar-erase" value="1" /> ' . __('移除本地头像','simple-local-avatars') . '<br /> <span class="description">' . __('如需要修改本地头像,请重新上传新头像。如需要移除本地头像,请选中上方的“移除本地头像”复选框并更新个人资料即可。<br/>移除本地头像后,将恢复使用 Gravatar 头像。','simple-local-avatars') . '</span> '; } else { if ( empty( $profileuser->simple_local_avatar ) ) echo '<span class="description">' . __('尚未设置本地头像,请在 Gravatar.com 网站设置头像。','simple-local-avatars') . '</span>'; else echo '<span class="description">' . __('你没有头像上传权限,如需要修改本地头像,请联系站点管理员。','simple-local-avatars') . '</span>'; } ?> </td> </tr> </table> <script type="text/javascript">var form = document.getElementById('your-profile');form.encoding = 'multipart/form-data';form.setAttribute('enctype', 'multipart/form-data');</script> <?php } public function edit_user_profile_update( $user_id ) { if ( ! isset( $_POST['_simple_local_avatar_nonce'] ) || ! wp_verify_nonce( $_POST['_simple_local_avatar_nonce'], 'simple_local_avatar_nonce' ) ) //security return; if ( ! empty( $_FILES['simple-local-avatar']['name'] ) ) { $mimes = array( 'jpg|jpeg|jpe' => 'image/jpeg', 'gif' => 'image/gif', 'png' => 'image/png', 'bmp' => 'image/bmp', 'tif|tiff' => 'image/tiff' ); // front end (theme my profile etc) support if ( ! function_exists( 'wp_handle_upload' ) ) require_once( ABSPATH . 'wp-admin/includes/file.php' ); $this->avatar_delete( $user_id ); // delete old images if successful // need to be more secure since low privelege users can upload if ( strstr( $_FILES['simple-local-avatar']['name'], '.php' ) ) wp_die('For security reasons, the extension ".php" cannot be in your file name.'); $this->user_id_being_edited = $user_id; // make user_id known to unique_filename_callback function $avatar = wp_handle_upload( $_FILES['simple-local-avatar'], array( 'mimes' => $mimes, 'test_form' => false, 'unique_filename_callback' => array( $this, 'unique_filename_callback' ) ) ); if ( empty($avatar['file']) ) { // handle failures switch ( $avatar['error'] ) { case 'File type does not meet security guidelines. Try another.' : add_action( 'user_profile_update_errors', create_function('$a','$a->add("avatar_error",__("请上传有效的图片文件。","simple-local-avatars"));') ); break; default : add_action( 'user_profile_update_errors', create_function('$a','$a->add("avatar_error","<strong>".__("上传头像过程中出现以下错误:","simple-local-avatars")."</strong> ' . esc_attr( $avatar['error'] ) . '");') ); } return; } update_user_meta( $user_id, 'simple_local_avatar', array( 'full' => $avatar['url'] ) ); // save user information (overwriting old) } elseif ( ! empty( $_POST['simple-local-avatar-erase'] ) ) { $this->avatar_delete( $user_id ); } } /** * remove the custom get_avatar hook for the default avatar list output on options-discussion.php */ public function avatar_defaults( $avatar_defaults ) { remove_action( 'get_avatar', array( $this, 'get_avatar' ) ); return $avatar_defaults; } /** * delete avatars based on user_id */ public function avatar_delete( $user_id ) { $old_avatars = get_user_meta( $user_id, 'simple_local_avatar', true ); $upload_path = wp_upload_dir(); if ( is_array($old_avatars) ) { foreach ($old_avatars as $old_avatar ) { $old_avatar_path = str_replace( $upload_path['baseurl'], $upload_path['basedir'], $old_avatar ); @unlink( $old_avatar_path ); } } delete_user_meta( $user_id, 'simple_local_avatar' ); } public function unique_filename_callback( $dir, $name, $ext ) { $user = get_user_by( 'id', (int) $this->user_id_being_edited ); $name = $base_name = sanitize_file_name( $user->user_login . '_avatar' ); $number = 1; while ( file_exists( $dir . "/$name$ext" ) ) { $name = $base_name . '_' . $number; $number++; } return $name . $ext; } } $simple_local_avatars = new Simple_Local_Avatars; /** * more efficient to call simple local avatar directly in theme and avoid gravatar setup * * @param int|string|object $id_or_email A user ID, email address, or comment object * @param int $size Size of the avatar image * @param string $default URL to a default image to use if no avatar is available * @param string $alt Alternate text to use in image tag. Defaults to blank * @return string <img> tag for the user's avatar */ function get_simple_local_avatar( $id_or_email, $size = '96', $default = '', $alt = false ) { global $simple_local_avatars; $avatar = $simple_local_avatars->get_avatar( '', $id_or_email, $size, $default, $alt ); if ( empty ( $avatar ) ) $avatar = get_avatar( $id_or_email, $size, $default, $alt ); return $avatar; }
使用方法
1、将下载的压缩包解压至主题目录,也就是/wp-content/themes/你的主题/
2、然后在functions.php引入:
//用户自定义头像功能
include TEMPLATEPATH . '/extends/avatar/simple-local-avatars.php';
完成以上步骤后,进入网站后台-用户-我的个人资料查看,是不是已经有了自定义上传头像功能呢?
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