php

# PHP Skill PHP code quality and testing: strict types, PSR-12 compliance, modern language features, framework idioms, static analysis tooling, and PHPUnit testing patterns. ## Reference Loading Table | Signal | Reference | Size | |--------|-----------|------| | union types, intersection types, DNF, enums, readonly, named arguments, match expression, null-safe operator, PHP 8.0, PHP 8.1, PHP 8.2 | `references/modern-php-features.md` | ~160 lines | | Laravel, Eloquent, Collections, Service Container, Symfony, DI attributes, Event Dispatcher, framework | `references/framework-idioms.md` | ~70 lines | | PHP-CS-Fixer, PHPStan, Psalm, Rector, static analysis, CI, linting, code style, taint analysis | `references/quality-tools.md` | ~60 lines | | PHPUnit tests, data providers, mocks, stubs, database testing, HTTP testing, coverage | `references/testing-patterns.md` | ~120 lines | | quality review process, phases, PSR-12 enforcement | `references/php-quality.md` | ~60 lines | | test writing process, test doubles, Prophecy, database fixtures | `references/php-testing.md` | ~50 lines | **Loading rule.** Read the references whose signals match the task before responding. --- ## Core Rules (Always Apply) ### Strict Types Declaration Every PHP file must begin with `declare(strict_types=1)`. This enforces scalar type coercion rules, catching type errors at call time instead of silently converting values. Omitting it is a code quality defect. ### PSR-12 Coding Standard PSR-12 ext...