WordPress添加本地头像功能代替Gravatar头像功能
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以下代码由PHP站长网 52php.cn收集自互联网现在PHP站长网小编把它分享给大家，仅供参考 目前 wordpress 网站几乎都是使用 Gravatar 全球通头像来关联用户头像的，但是由于 Gravatar 的服务器是在国外，国内经常由于某些 XXX 原因而连接不上，为了解决这个问题小 V 之前提到过使用国内的 cdn 服务来镜像 Gravatar 头像，而开放注册性网站则可以使用 simple-local-avatars 插件将网站用户的头像完全本地化，这样就不用担心 Gravatar 头像超时造成网站经常打开缓慢的问题了。 今天创客就来教大家使用代码将 Gravatar 头像半本地化,那么什么是半本地化呢？也就是通过用户的邮箱判断用户是否拥有 Gravatar 头像，如果拥有则使用 Gravatar 头像，当用户拥有本地头像且拥有 Gravatar 头像时，则优先使用本地头像。 <?php 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','admin_init' ) ); add_action( 'show_user_profile','edit_user_profile' ) ); add_action( 'edit_user_profile','edit_user_profile' ) ); add_action( 'personal_options_update','edit_user_profile_update' ) ); add_action( 'edit_user_profile_update','edit_user_profile_update' ) ); add_filter( 'avatar_defaults','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,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( $user_id,$local_avatars ); } elseif ( substr( $local_avatars[$size],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','sanitize_options' ) ); add_settings_field( 'simple-local-avatars-caps',__('Local Avatar Permissions','simple-local-avatars'),'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 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">' . __('你没有头像上传全乡，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',"<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,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','get_avatar' ) ); return $avatar_defaults; } /** * delete avatars based on user_id */ public function avatar_delete( $user_id ) { $old_avatars = get_user_meta( $user_id,true ); $upload_path = wp_upload_dir(); if ( is_array($old_avatars) ) { foreach ($old_avatars as $old_avatar ) { $old_avatar_path = str_replace( $upload_path['baseurl'],$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; function get_simple_local_avatar( $id_or_email,$size = '96',$alt = false ) { global $simple_local_avatars; $avatar = $simple_local_avatars->get_avatar( '',$default,$alt ); if ( empty ( $avatar ) ) $avatar = get_avatar( $id_or_email,$alt ); return $avatar; } 将以上代码加入到 functions.php 或者 functinos.php 引入的 php 文件中即可实现 Gravatar 头像半本地化，最后来张效果图：
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