说明：  PHP3.0版本是一种服务器端HTML-嵌入式脚本描述语言。 　 PHP3能做什么？ 也许PHP3最强大和最重要的特征是他的数据库集成层，使用它完成一个含有数据库功能的网页是不可置信的简单。目前支持下面所列的数据库。
(PHP3.0 version is a server-side HTML-embedded scripting language description. PHP3 what can you do? PHP3 perhaps the most powerful and most important features of his database integration layer, use it to complete a database containing function of the website is incredibly simple. Currently supports the database are listed below.)