***发展历程
Static page period: The browser sends a request to the server, and the server searches the HTML file according to the request and sends it to the browser. File suffix. HTML
dynamic page period: Compared to static, a language interpreter is required to interpret the PHP language and go to the database to manipulate the data. The file suffix. PHP
***目前主流服务器架构
服务器架构不是一成不变的，有很多组合方式。
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