看看update_user_meta如果用户正在注册或登录，您可以保存用户数据，这只是您传递给它的用户ID的问题。

在登录后保存用户数据的功能中说：

function save_user_data_7231(){
    global $current_user;
    if is_user_logged_in{ //check if user is logged in.
        if (isset($_POST[\'Notes\'])){
            // get current user info
            get_currentuserinfo();
            $old_notes = get_user_meta($current_user->ID, \'user_notes\', true);
            if (isset($old_notes)&& is_array($old_notes)){
                //if we saved already more the one notes
                $old_notes[] = $_POST[\'Notes\'];
                update_user_meta( $current_user->ID, \'user_notes\', $old_notes);
            }
            if (isset($old_notes)&& !is_array($old_notes)){
                //if we saved only one note before
                $new_notes = array($old_notes,$_POST[\'Notes\']);
                update_user_meta( $current_user->ID, \'user_notes\', $new_notes)
            }
            if (!isset($old_notes)){
                //first note we are saving fr this user
                update_user_meta( $current_user->ID, \'user_notes\', $_POST[\'Notes\'])
            }
        }
    } 
}

function get_user_notes_654(){
    global $current_user;
    if is_user_logged_in{ //check if user is logged in.
        // get current user info
        get_currentuserinfo();
        $old_notes = get_user_meta($current_user->ID, \'user_notes\', true);
        if (!isset($old_notes)){
            $re = \'No Notes YET!\';
        }
        if (isset($old_notes)){//we have notes. Removed the extra ! here.
            if (is_array($old_notes)){//more then one
                foreach($old_notes as $note){
                    $re .= \'<strong>note:</strong>\' . $note . \'<br />\'; 
                }
            }else{//just one
                $re = \'<strong>note:</strong>\' . $old_notes . \'<br />\';
            }
        }
        re .=\'//add note form  would come here\';
        return $re;
    }
}