Provides rich background information to beginners entering this subject area. The diagrams are clear-cut, as are the snippets of codes. There are hardly any errors throughout the book. covers a broad and coherent range of distributed-computing techni

一款很经典的留言本，提供留言本的常用功能，可以显示头像、邮件、QQ、主页等常见项，后台管理除了包含管理、高级删除等常规功能，还提供了验证码功能，以防止他人用软件方式反复提交数据-A classic guestbook, guest book provides common functions, you can display picture, e-mail, QQ, Home and other common items, management background in addition to