PHP，PSR开发规范

https://github.com/hfcorriez/fig-standards/tree/zh_CN/%E6%8E%A5%E5%8F%97

PSR-1-basic-coding-standard.md	optimize PSR-1
PSR-2-coding-style-guide.md	Update PSR-2-coding-style-guide.md
PSR-3-logger-interface.md	optimize PSR-3
PSR-4-autoloader.md	Fix and improve PSR-4