php-development

PHP Development

Production patterns for modern PHP (8.x+), covering Composer, PSR standards, type safety, testing with PHPUnit, and architectural best practices.

When to Use This Skill

• Building or structuring a PHP application
• Working with Composer for dependency management
• Following PSR standards (autoloading, coding style)
• Using PHP 8.x features (attributes, enums, fibers, typed properties)
• Writing tests with PHPUnit
• Applying clean architecture in PHP projects

Core Concepts

1. Project Layout (PSR-4)

myapp/
├── src/
│   ├── Controller/
│   │   └── UserController.php
│   ├── Service/
│   │   └── UserService.php
│   ├── Repository/
│   │   └── UserRepository.php
│   ├── Entity/
│   │   └── User.php
│   ├── Exception/
│   │   ├── AppException.php
│   │   └── NotFoundException.php
│   └── ValueObject/
│       └── Email.php
├── tests/
│   ├── Unit/
│   │   └── Service/
│   │       └── UserServiceTest.php
│   └── Integration/
│       └── Repository/
│           └── UserRepositoryTest.php
├── config/
├── public/
│   └── index.php
├── composer.json
├── phpunit.xml
└── README.md

2. Key Standards

Standard	Purpose
PSR-4	Autoloading: namespace ↔ directory map
PSR-12	Extended coding style (superseded by PER-CS)
PSR-7	HTTP message interfaces
PSR-11	Container interface (DI)
PSR-3	Logger interface

Quick Start

# Initialize project
composer init

# Install dependencies
composer require guzzlehttp/guzzle
composer require --dev phpunit/phpunit phpstan/phpstan

# Autoload (PSR-4 in composer.json)
composer dump-autoload

# Run tests
./vendor/bin/phpunit

# Static analysis
./vendor/bin/phpstan analyse src --level=max

# Code style fix
./vendor/bin/php-cs-fixer fix src

{
    "autoload": {
        "psr-4": {
            "App\\": "src/"
        }
    },
    "autoload-dev": {
        "psr-4": {
            "App\\Tests\\": "tests/"
        }
    }
}