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  PHP是一种网站后端脚本语言,通常在web开发中使用apache+PHP+MYSQL这种黄金搭档来建立支持PHP的站点,PHP运行环境或者说任何技术的运行环境都不是简单的加法,即使是安装有apache+PHP+MYSQL的环境也不能正确运行PHP,还要做一些配置工作,网上很多教程只讲如何做这些配置,却不讲为什么这么配置。这导致许多新手在糊里糊涂地情况下编程,对于深入理解构成障碍。而我的文章恰恰相反,我只讲为什么这么配置和安装,至于具体的配置和安装过程,请自行百度。

  首先独立的安装PHP的运行环境apache+PHP+MYSQL。在这个过程中需要注意两点:(1)php解压就安装了,php.ini-development与php.ini-production无意义,只有php.ini有意义,二择一(2)apache的安装有dos安装和msi界面安装两种,两者的区别是有无安装引导界面,安装后通过运行bin下的ApacheMonitor.exe来开启apache

  PHP的运行原理本质上是浏览器与web服务器之间的通信,浏览器提交请求,web服务器收到请求后将任务交给对应的程序处理,如PHP解释器,MYSQL数据库等,待任务处理完后,web服务器收集处理后的结果并返回给浏览器。所以apache只是相当于管家的角色,并没有实际处理能力,故它需要调用PHP解释器,MYSQL数据库等程序帮忙。apache通过一个模块调用php,这个模块(通常由PHP程序提供)可以是php5apache2_2,模块上清楚的标明了php与apache匹配的版本,所以事先应该下载apache与php兼容的版本。修改apache的配置文件即可实现apache调用php的衔接,配置操作可以简单概括为一句话:就是说明【什么情况下】【调用什么模块】【处理什么】。

  以上过程完成了PHP的运行环境,另外还要安装PHP的开发环境,一个php expert editor就够了,它是一个带请求的编辑器,可以理解为记事本+浏览器。写好PHP代码点击运行,就可以看到运行结果,但软件本身并没有PHP运行能力,只不过是向apache发出“请处理PHP”的请求而已。打开IDE的run的option,选择外部apache服务器地址,就可以实现IDE调用apache的衔接。

  所有步骤完成之后别忘了测试网站,新手往往忙活了半天,却发现网站无法访问,这主要是没有把墙拆掉的缘故。首先更改防火墙,允许别人接入自己的服务器;再者如果有路由器,要做端口映射。

  事实上,上面所有的过程完全可以不做,现在互联网在线开发运行环境异军突起,只要注册一个帐号,打开对应的web在线环境即可学习编程,不过我并不赞成学生这样做,自己动手搭建环境,会对web,PHP的运行原理有深入的理解;而一味的只使用别人封装好的东西,只会让我们成为代码工人。

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PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

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