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php internal(php体系结构和原理)

一.前言-后端如何处理一条index.php动态请求。

很多公司用lnmp环境作为基础软件环境,用php能做快速开发。下面简单描述下,后端是如何处理一个从浏览器发起的 http://www.abcdxxx.com/index.php的请求的。

browser->nginx 通过http协议,nginx 接收浏览器发的动态请求。

browser->nginx->phpcgi,nginx把接收到的请求,通过cgi协议,发送给php-fpm进程做处理。

php-fpm内部处理过程,先把php程序,编译成opcode 字节码,然后把opcode字节码 放到zend 引擎(虚拟机) 上运行,和java类似。

zend 引擎(虚拟机)直接与操作系统,发起系统调用等处理请求。

如果涉及到需要连mysql,那就发起请求,通过mysql client协议,将请求发给mysql,去操作mysql的数据。


二.参考资料

https://github.com/reeze/tipi/blob/master/web/releases/TIPI_2014-04-29_V0.8.3.chm?raw=true

http://yanbin.org/download/php-internals.pdf

http://derickrethans.nl/talks/internals.pdf

http://nginx.org/en/docs/http/request_processing.html

http://cdn.nginx.com/wp-content/uploads/2015/04/150427_NGINX-subway_RGB.png


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