Backend PHP Standards

Backend PHP Standards

When to use this skill

• Starting new PHP projects
• Code reviews
• Establishing team standards
• Refactoring legacy code

Workflow

• Follow PSR-12 coding style
• Use PSR-4 autoloading
• Enable strict types
• Type hint all parameters and returns
• Use meaningful variable names

Instructions

PSR-12 Coding Style

<?php

declare(strict_types=1);

namespace App\Controllers;

use App\Services\UserService;

class UserController extends BaseController
{
    public function __construct(
        private readonly UserService $userService
    ) {}

    public function index(): string
    {
        $users = $this->userService->getAllUsers();
        return view('users/index', ['users' => $users]);
    }
}

Strict Types

<?php

declare(strict_types=1);

function calculateTotal(int $quantity, float $price): float
{
    return $quantity * $price;
}

Naming Conventions

• Classes: PascalCase (UserController, OrderService)
• Methods: camelCase (getUser(), createOrder())
• Constants: UPPER_SNAKE_CASE (MAX_RETRIES, API_VERSION)
• Properties: camelCase ($userName, $isActive)

Resources

• PSR-1: Basic coding standard
• PSR-12: Extended coding style
• PSR-4: Autoloading standard