第一章 1/3节 LAMP概述及PHP的用场
第一章 1/3节 LAMP概述及PHP的用途
1. 缩写：LAMP=(Linux+Apache+MySql+PHP)(即OS+WebAapp+DB+后台脚本)
2. 问：LAMP是如何工作的？
答：域名->
DNS->
IP:80->
(Linux、Unix(hp-UX,Solaris OpenBSD)、Microsoft Windows Mac Ox RISC OS)->
服务器(apache IIS PWS)->
index.php->
数据库：MySQL、Oracle、Informix、Sybase、MS SQL Server、PostgreSql->
前台语言->
客户端->
浏览器解释
3. 问：PHP能做什么？
答：Unix和Linux环境，特殊的Windows场合直接用命令解释器PHP程序，以及桌面程序(很少用)
4. 选择PHP的原因？
答：PHP开发时间几乎是Java的一半
PHP是解释型，Java是编译型，所以PHP运行速度不如Java
但PHP可以通过静态化，优化来提高运行效率
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