要将字段添加到配置文件/用户编辑页面，需要使用edit_user_profile 挂钩和show_user_profile 钩住so：

add_action( \'show_user_profile\', \'my_extra_user_fields\' );
add_action( \'edit_user_profile\', \'my_extra_user_fields\' );
function my_extra_user_fields( $user ) 
{ ?>
    <h3>User avatar</h3>

    <table class="form-table">
        <tr>
            <th><label for="user_avatar">User avatar</label></th>
            <td>
                <input id="user_avatar" name="user_avatar" type="text" value="
                    <?php $user_avatar = get_the_author_meta( \'user_avatar\', $user->ID ); 
                        echo $user_avatar ? $user_avatar : \'\';?>" />
                <span class="description"><?php _e("Please enter Avatar URL."); ?></span>
            </td>
        </tr>
    </table>
<?php }

add_action( \'personal_options_update\', \'save_my_extra_user_fields\' );
add_action( \'edit_user_profile_update\', \'save_my_extra_user_fields\' );

function save_my_extra_user_fields( $user_id ) 
{
    if ( !current_user_can( \'edit_user\', $user_id ) ) { return false; }else{

        if(isset($_POST[\'user_avatar\']) && $_POST[\'user_avatar\'] != ""){
            update_usermeta( $user_id, \'user_avatar\', $_POST[\'user_avatar\'] );
        }
    }
}