Legacy PHP Code Analysis with AI as a Code Partner

Legacy PHP is not the problem. Blind refactoring is. Old code is not automatically bad code. Sometimes old code is code that survived: - real customers - real payments - real traffic - real edge cases - real production incidents The dangerous part is not that the code is old. The dangerous part is that nobody fully remembers all the business rules inside it. That is where AI can help — not as a magic rewrite button, but as a code analysis partner. A safer workflow: 1. Ask AI to explain the method 2. Extract hidden business rules 3. Identify side effects 4. Add tests first 5. Refactor in small diffs 6. Compare behavior before and after 7. Review SQL, security, and performance 8. Let a human approve AI-generated refactoring without understanding is just faster risk. The best use of AI in legacy code is not writing code. It is helping engineers understand the system before they change it. #PHP #LegacyCode #SoftwareEngineering #Refactoring #AI #ClaudeCode #BackendDevelopment #Laravel #CodeReview #Testing #EngineeringLeadership #SystemDesign

  • Legacy PHP is not the problem. Blind refactoring is.

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