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 |