因为网站重建后无法与Gravatar 同步 头像,找了很多教程都没有实现。现如今终于解决所以分享出来:

搬砖于主题猫

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,今天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', 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 ) && ! emptyempty( $id_or_email->user_id ) )  
            $user_id = (int) $id_or_email->user_id;  
          
        if ( emptyempty( $user_id ) )  
            return $avatar;  
          
        $local_avatars = get_user_meta( $user_id, 'simple_local_avatar', true );  
          
        if ( emptyempty( $local_avatars ) || emptyempty( $local_avatars['full'] ) )  
            return $avatar;  
          
        $size = (int) $size;  
          
        if ( emptyempty( $alt ) )  
            $alt = get_the_author_meta( 'display_name', $user_id );  
          
        // generate a new size  
        if ( emptyempty( $local_avatars[$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', __('Local Avatar Permissions','simple-local-avatars'), array( $this, 'avatar_settings_field' ), 'discussion', 'avatars' );  
    }  
          
    public function sanitize_options( $input ) {  
        $new_input['simple_local_avatars_caps'] = emptyempty( $input['simple_local_avatars_caps'] ) ? 0 : 1;  
        return $new_input;&nb
sp; 
    }  
          
    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 ( emptyempty($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 ( emptyempty( $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 ( emptyempty( $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 ( ! emptyempty( $_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  
          
       &
nbsp;    // 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 ( emptyempty($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 ( ! emptyempty( $_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;  
    }&nb
sp; 
          
    /** 
     * 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 = $base_name = sanitize_file_name( substr(md5($user->user_login),0,12) . '_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', $default = '', $alt = false ) {  
    global $simple_local_avatars;  
    $avatar = $simple_local_avatars->get_avatar( '', $id_or_email, $size, $default, $alt );  
          
    if ( emptyempty ( $avatar ) )  
        $avatar = get_avatar( $id_or_email, $size, $default, $alt );  
          
    return $avatar;  
}  

将以上代码加入到functions.php或者functions.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