# Dead Code Detector PHPStan extension that finds unused class members (methods, constants, enum cases, properties) in a PHP codebase, including dead cycles and transitively dead members. Can automatically remove detected dead code. ## How detection works 1. **Regular member usages** are collected from AST by `MethodCallCollector` and others (method calls, static calls, constructors, property accesses, constant fetches, etc.). These are standard visible usages in source code. 2. **Vendor-overridden members** are handled by `VendorUsageProvider`. When your class implements an interface or overrides a method from `vendor/`, it is marked as used because the vendor code is expected to call it. Library-specific providers must NOT re-emit these — the vendor provider already covers them. 3. **Truly magic calls** are invisible in source code and must be emitted by library-specific providers (e.g. Symfony DIC calling constructors, Nette `handleXxx`/`renderXxx` signal methods, Doctrine lifecycle listeners). These providers must 100% match what the framework actually does at runtime — ALWAYS verify against the vendor source code. ## Supported members - Methods, constants, enum cases, properties are detected. - Magic methods (`__get`, `__set`, `__call`, etc.) are never reported as dead. Only `__construct` and `__clone` are analyzed. ## Verifying code - `composer check` - run all checks (composer, editorconfig, codesniffer, phpstan, coverage, collisions, dependencies) - `composer fix:cs` - autofix coding style - `composer check:types` - run PHPStan analysis only - `composer check:tests` - run PHPUnit tests only ## Other rules - All code (functions, syntax, dependencies) MUST be compatible with PHP 8.1+. - Library usage providers must not create or mimic 3rd party class stubs. Instead, install the dependency as a dev dependency in composer.json. - Use `readonly` properties everywhere possible

Dead Code Detector

PHPStan extension that finds unused class members (methods, constants, enum cases, properties) in a PHP codebase, including dead cycles and transitively dead members. Can automatically remove detected dead code.

How detection works

Regular member usages are collected from AST by MethodCallCollector and others (method calls, static calls, constructors, property accesses, constant fetches, etc.). These are standard visible usages in source code.
Vendor-overridden members are handled by VendorUsageProvider. When your class implements an interface or overrides a method from vendor/, it is marked as used because the vendor code is expected to call it. Library-specific providers must NOT re-emit these — the vendor provider already covers them.
Truly magic calls are invisible in source code and must be emitted by library-specific providers (e.g. Symfony DIC calling constructors, Nette handleXxx/renderXxx signal methods, Doctrine lifecycle listeners). These providers must 100% match what the framework actually does at runtime — ALWAYS verify against the vendor source code.

Supported members

Methods, constants, enum cases, properties are detected.
Magic methods (__get, __set, __call, etc.) are never reported as dead. Only __construct and __clone are analyzed.

Verifying code

composer check - run all checks (composer, editorconfig, codesniffer, phpstan, coverage, collisions, dependencies)
composer fix:cs - autofix coding style
composer check:types - run PHPStan analysis only
composer check:tests - run PHPUnit tests only

Other rules

All code (functions, syntax, dependencies) MUST be compatible with PHP 8.1+.
Library usage providers must not create or mimic 3rd party class stubs. Instead, install the dependency as a dev dependency in composer.json.
Use readonly properties everywhere possible