Rector is a tool that allows developers to instantly upgrade and refactor legacy code by processing source code directories and migrating them to new frameworks, standards or any other changes with one simple command. The document discusses how Rector was used to migrate a Nette project consisting of over 54,000 lines of PHP code to Symfony in just one month by running a single command. It also explains how Rector can be used to fix PHPStan errors, remove dead code, and boost code quality in CI/CD pipelines with additional commands.

1. Instant Upgrades
with Rector
Tomas Votruba

4. “Code becomes legacy
as soon as it’s been written”

5. Knowledge becomes legacy
as soon as it’s been learned

6. TimetoRefactorLegacy

8. Nette → Symfony Case Study
54 357 lines of PHP code | 151 routes

12. vendor/bin/rector process src
--level nette-to-symfony
All Know How = 1 set
bit.ly/nette-to-symfony

14. TimetoRefactorLegacy

16. Any legacy project
can be migrate to
a new framework
in 1 month.

18. One more thing...

19. FixingPHPStanErrors

20. Boost Your CI Today
vendor/bin/rector process src --level code-quality
vendor/bin/rector process src --level dead-code

21. Like it? Support Rector

22. Thank you!
Questions?
joind.in/talk/70fb4