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everything-claude-code/rules/php/coding-style.md
2026-03-10 21:10:26 -07:00

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---
paths:
- "**/*.php"
- "**/composer.json"
---
# PHP Coding Style
> This file extends [common/coding-style.md](../common/coding-style.md) with PHP specific content.
## Standards
- Follow **PSR-12** formatting and naming conventions.
- Prefer `declare(strict_types=1);` in application code.
- Use scalar type hints, return types, and typed properties everywhere new code permits.
## Immutability
- Prefer immutable DTOs and value objects for data crossing service boundaries.
- Use `readonly` properties or immutable constructors for request/response payloads where possible.
- Keep arrays for simple maps; promote business-critical structures into explicit classes.
## Formatting
- Use **PHP-CS-Fixer** or **Laravel Pint** for formatting.
- Use **PHPStan** or **Psalm** for static analysis.
- Keep Composer scripts checked in so the same commands run locally and in CI.
## Error Handling
- Throw exceptions for exceptional states; avoid returning `false`/`null` as hidden error channels in new code.
- Convert framework/request input into validated DTOs before it reaches domain logic.
## Reference
See skill: `backend-patterns` for broader service/repository layering guidance.