PHP Error Handling

Priority: P0 (CRITICAL)

Structure

src/
└── Exceptions/
    ├── {Domain}Exception.php
    └── Handler.php

Implementation Guidelines

• Exception-Driven: Prefer throwing exceptions over returning false.
• Throwable Interface: Catch Throwable for both Errors and Exceptions.
• Custom Exceptions: Extend RuntimeException for domain-specific errors.
• Multi-catch: Use catch (TypeA | TypeB $e) for identical handling.
• Finally Cleanup: Use finally to ensure resource release.
• Global Handling: Set set_exception_handler in entry points.
• PSR-3 Logging: Log critical faults using standard loggers.

Anti-Patterns

• Error Suppression: No @: Avoid suppressing errors with @.
• Silent Catch: No Empty Catches: Log or handle all caught exceptions.
• Logic Flow: No Flow Control: Don't use exceptions for expected logic.
• Panic Display: No display_errors: Log to file, never to production screen.

References

• Exception & Logging Patterns