A Practical Guide to PHP 8 for Building Real Web Applications

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Learn PHP the modern way, from your first script to a production marketplace.

PHP runs a large share of the web: online shops, content sites, learning platforms, internal tools, and the APIs behind mobile apps. It is easy to start with, cheap to host, and fast to iterate on. It also carries an old reputation for messy code and security holes. Much of that comes from outdated tutorials. Modern PHP has strict typing, enums, readonly classes, attributes, property hooks, Composer, shared PSR standards, excellent static analysis, and mature frameworks.

This book teaches PHP the modern way from the very first chapter, so you never learn old habits only to unlearn them later. You build one real application step by step, and each new idea appears at the moment it solves a problem you actually have.

What's inside

• What PHP is good at, how it runs (CLI, built-in server, PHP-FPM), and setting up PHP 8.4 and Composer on Windows, macOS, Linux, or Docker
• Fundamentals: types and strict typing, strings and UTF-8, arrays, control flow, functions, closures, and generators
• Object-oriented PHP: classes, readonly value objects, interfaces, traits, enums, namespaces, PSR-4 autoloading, and exceptions
• Modern PHP 8 features: match, named arguments, attributes, first-class callables, property hooks, and asymmetric visibility
• The web without magic: requests and responses, a front controller and router, safe templates and output escaping, Twig
• Forms and validation, CSRF protection, secure file uploads, sessions, cookies, password hashing, and authentication
• PDO and prepared statements, schema design and migrations, repositories, transactions, and a checkout that never oversells
• Caching with APCu and Redis, rate limiting, JSON, dates and time zones, and handling money correctly in integer cents
• A REST API with token authentication, pagination, validation errors, idempotency keys, and OpenAPI
• Dependency injection, PSR-7/PSR-15 middleware, background jobs, email, payment webhooks with HMAC signatures, and seller payouts
• How Laravel and Symfony package the same ideas, so you can move to a framework with confidence
• PHPUnit testing, PHPStan, coding standards, Xdebug, Monolog logging, security hardening, OPcache, Docker, Nginx + PHP-FPM, and CI/CD

One running example, start to finish. You build Orbit Store, a fictional online marketplace where independent sellers list products and customers buy from several sellers in one order. A few command-line scripts grow into a clean domain model, a server-rendered store with a cart, login, and checkout, a MySQL-backed application, a REST API, and a system that sends emails, processes payment webhooks, and calculates seller commissions — then it is tested, hardened, and deployed in containers.

Current and honest. PHP 8.4 is the baseline, and the version each modern feature needs is always labeled. The book contains no invented benchmarks or statistics. Every chapter includes complete code, Tips, Notes, Warnings, exercises, and Key Takeaways, and the appendices give you a cheat sheet, copy-ready templates (composer.json, php.ini, Nginx, Dockerfile, PHPUnit, CI), a production checklist, and a glossary.

Format: PDF, 577 pages (A4), linked table of contents and bookmarks. English. First Edition, 2026. Published by thenexbooks. This book is independent and is not affiliated with or endorsed by The PHP Group, the PHP Foundation, PHP-FIG, or any framework vendor.

Table of Contents

Part I — Getting Started

• Ch 1 · Why PHP? The Language, Its Ecosystem, and Your Setup
• Ch 2 · Your First Scripts: The CLI, the Built-in Server, and How PHP Runs
• Ch 3 · Types, Variables, Operators, and Strict Typing
• Ch 4 · Strings, Arrays, and Working with Data
• Ch 5 · Control Flow, Functions, and Closures

Part II — Object-Oriented PHP

• Ch 6 · Classes, Objects, Constructors, and Readonly Properties
• Ch 7 · Interfaces, Abstract Classes, Traits, and Enums
• Ch 8 · Namespaces, Autoloading, and Composer
• Ch 9 · Errors, Exceptions, and Defensive Code
• Ch 10 · Modern PHP 8 Features: match, Attributes, Property Hooks, and More

Part III — Building for the Web

• Ch 11 · HTTP in PHP: Requests, Responses, and Superglobals
• Ch 12 · Routing and the Front Controller
• Ch 13 · Templates and Views: Escaping, Layouts, and Twig
• Ch 14 · Forms, Validation, and File Uploads
• Ch 15 · Sessions, Cookies, and Authentication

Part IV — Data and Persistence

• Ch 16 · Databases with PDO: Connections, Queries, and Prepared Statements
• Ch 17 · Designing the Orbit Store Schema and Running Migrations
• Ch 18 · Repositories, Transactions, and the Checkout Flow
• Ch 19 · Caching with APCu and Redis
• Ch 20 · JSON, Dates and Time Zones, and Money Done Right

Part V — Real-World Applications

• Ch 21 · Building a REST API for Orbit Store
• Ch 22 · Dependency Injection, PSR Standards, and Middleware
• Ch 23 · Background Jobs, Email, and Payment Webhooks
• Ch 24 · Frameworks in Practice: Laravel and Symfony

Part VI — Quality and Production

• Ch 25 · Testing with PHPUnit (and Pest)
• Ch 26 · Static Analysis, Coding Standards, Debugging, and Logging
• Ch 27 · Security Hardening and Performance Tuning
• Ch 28 · Deployment: Docker, Nginx + PHP-FPM, CI/CD, and the Final Case Study

Appendices
A · PHP Cheat Sheet
B · Templates and Reference
C · Production Checklist
D · Glossary

Book details