PHP & Laravel Roadmap: Architecture, Eloquent ORM, and Composer Operations

Modern PHP is a fast, type-safe scripting language equipped with an rich ecosystem of tools and frameworks. At the top of this ecosystem sits Laravel, a powerful web framework that values developer ergonomics, clean separation of concerns, and robust package management.

1. Object-Oriented PHP & strict types

Modern PHP (v8+) supports strict types and clean object-oriented syntax. Placing declare(strict_types=1); at the top of your files forces static compile-time type-safety checks:

<?php
declare(strict_types=1);

namespace App\Services;

interface TaskInterface {
    public function execute(string $taskName): bool;
}

class SystemTask implements TaskInterface {
    public function __construct(
        protected string $environment
    ) {}

    public function execute(string $taskName): bool {
        // Run tasks in target environment
        return true;
    }
}

2. Laravel MVC Architecture & Dependency Injection

Laravel is structured as a Model-View-Controller (MVC) framework. It features an IoC (Inversion of Control) container that manages dependency injection:

<?php
// app/Http/Controllers/UserController.php

namespace App\Http\Controllers;

use App\Repositories\UserRepository;
use Illuminate\Http\JsonResponse;

class UserController extends Controller {
    // UserRepository is automatically resolved and injected
    public function __construct(
        protected UserRepository $userRepository
    ) {}

    public function index(): JsonResponse {
        $users = $this->userRepository->allActive();
        return response()->json($users);
    }
}

3. Eloquent ORM & Query Optimization

Eloquent provides an ActiveRecord implementation for working with databases. While highly readable, developers must be careful to avoid performance traps like the N+1 query issue.

Problem:

$books = Book::all(); // 1 query
foreach ($books as $book) {
    echo $book->author->name; // N queries (one per book)
}

Solution (Eager Loading):

$books = Book::with('author')->get(); // Only 2 queries
foreach ($books as $book) {
    echo $book->author->name;
}

4. Package Management with Composer

Composer manages third-party libraries inside PHP. The package lifecycle relies on two files:

• composer.json: Lists the packages your application declares dependencies on.
• composer.lock: Records the exact versions of the packages installed, ensuring consistency across environments.

To install a package, run:

composer require laravel/sanctum

To install all locked dependencies:

composer install

Modern PHP applications use PHP-FIG coding standards (PSR-12/PSR-4) for automatic namespace class mapping.