How does this help with unit testing?

By identifying side effects, it helps you move toward pure functions and dependency injection, which are significantly easier to mock and test than code with hidden dependencies.

Can it suggest specific code changes?

Yes, for every detected side effect, the skill provides a comparison between the current code and a suggested refactor to demonstrate cleaner implementation patterns.

Is this skill specific to any PHP framework?

No, it is framework-agnostic and works with any PHP codebase, including Laravel, Symfony, or legacy 'vanilla' PHP applications.

What types of side effects does this skill detect?

It identifies state mutations, global/superglobal access, static state changes, I/O in logic, direct output operations, and non-deterministic calls like time or random functions.

Does it include automated scanning patterns?

Yes, it includes predefined grep patterns to quickly scan directories for common side-effect culprits like echo, superglobals, and file system operations.

PHP Side Effect Analyzer

Name: PHP Side Effect Analyzer
Author: dykyi-roman

bydykyi-roman

•

安全与测试

Identifies and refactors hidden side effects in PHP code to improve testability and architectural integrity.

The PHP Side Effect Analyzer is a specialized skill designed for Claude Code to audit PHP applications for patterns that hinder testability and maintainability. By detecting state mutations, global variable access, static property writes, and I/O operations mixed with business logic, this skill provides actionable refactoring strategies like Command/Query Separation and dependency injection. It is an essential tool for developers implementing Clean Architecture, DDD, or Hexagonal patterns, helping to ensure that core business logic remains deterministic, decoupled from infrastructure, and easy to unit test.

主要功能

01Classifies issues by severity to prioritize critical architectural improvements.

02Identifies architectural anti-patterns like superglobal and global variable access.

03Provides specific refactoring suggestions to transform side effects into pure functions.

04Highlights I/O operations incorrectly mixed with domain business logic.

0545 GitHub stars

06Detects hidden state mutations and unauthorized input modifications.

使用场景

01Enforcing Clean Architecture and SOLID principles during automated code reviews.

02Refactoring legacy PHP codebases to increase unit test coverage and reliability.

03Isolating core business logic from infrastructure concerns like databases, APIs, and file systems.

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add dykyi-roman/awesome-claude-code check-side-effects

For use in Claude.ai and ChatGPT

Download Skill