8. Debugging, Performance, and Production
This module focuses on keeping WordPress PHP reliable after it leaves your editor.
Lessons
- Debugging PHP in WordPress — inspect errors, logs, hooks, and queries
- Performance and Production Checklist — avoid slow and fragile PHP patterns
- Safe Maintenance and Incident Response — recover from broken updates and production problems
Production Rule
Development should reveal errors. Production should log errors, hide sensitive details, and fail safely.