October 2020
Intermediate to advanced
796 pages
15h 15m
Chinese
Content preview from PHP、MySQL 与JavaScript 学习手册
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94
｜
第
4
章
更合理的做法是把网站分成不同的部分，分别开发。例如，多数网站支持注册，在
此过程中，我们要验证电子邮件地址、判断用户名是否已被使用等。
此外，可能还需要登录功能，登录后再让用户查看网站的主体内容。接着，或许还
有一个消息模块，供用户发表评论，包含链接和有用信息的模块，以及上传图像的
模块等。
用户在网站中的操作可以通过
cookie
或会话变量（后面的章节详述）记录，如此以
来我们便可以合理划分，把网站分成不同的
PHP
代码模块，各模块自成一体。这样
做的好处未来能体现出来，我们可以在维护旧功能的基础上，增加新功能。如果身
在团队之中，不同的人可以负责不同的模块，这样每个程序员便可以专攻一项技术。
4.7
动态链接实例
现今，网上最受欢迎的
PHP
应用之一是博客平台
WordPress
（见图
4-5
）。写博客或
看博客的人可能没有发现，
WordPress
的每个主要模块是分别放在单独的
PHP
文件
中的，通用的函数也放在单独的文件中，在需要用到的
PHP
页面中再引入。
图
4
-
5
：博客平台 WordPress 的控制台
整个平台由看不见的会话整合在一起，你很难察觉从一个模块转到另一个模块了。
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.