WordPress Plugin Development Cookbook

Introduction

The book "WordPress Plugin Development Cookbook" (author — Yannick Lefebvre, 2017, 486 pages) is a practical guide to creating plugins for the world's most popular content management system — WordPress. Written in a "cookbook" format, it contains dozens of ready-made recipes that will help developers of any level master the key aspects of extending WordPress functionality using PHP.

Despite the fact that the book was published in 2017, its content remains relevant for WordPress versions 4.x–5.x, and many principles and hooks have carried over unchanged into newer versions. This makes the publication an excellent foundation for studying plugin architecture.

What the book is about

The book is structured as a collection of recipes — from simple (adding a shortcode, creating a widget) to complex (working with the REST API, setting up cron tasks, integrating with external services). Each recipe contains:

• a problem statement;
• ready-made code with explanations;
• modification and extension options.

Special attention is paid to security, performance, and compatibility with other plugins and themes. The author systematically covers all key WordPress components: actions, filters, shortcodes, widgets, custom post types, taxonomies, metaboxes, settings API, database API, and much more.

Who this book is for

The book is aimed at PHP developers who already have basic WordPress skills (installation, configuration, understanding the request loop) and want to learn how to create their own plugins. Beginners in PHP will find it challenging — knowledge of OOP, working with databases, and basic web development principles is assumed.

What the reader will learn

• How to organize the plugin file structure and use best coding practices.
• How to work with hooks (actions and filters) to modify the behavior of the core, themes, and other plugins.
• How to create custom shortcodes, widgets, and settings panels.
• How to add custom post types, taxonomies, and meta fields.
• How to use the WordPress REST API to create modern interfaces.
• How to perform background tasks using WP-Cron.
• How to integrate a plugin with external APIs (e.g., Twitter, Google Maps).
• How to ensure plugin security: escaping, nonce verification, preparing SQL queries.
• How to localize a plugin for multilingual sites.
• How to test and debug a plugin using built-in WordPress tools.

Strengths

The main advantage of the book is its practical focus. Each recipe can be immediately applied in a real project. The code is well-documented, and the author explains not only "how" but also "why" it should be done that way. The chapters on security and performance deserve special mention — these are often overlooked by novice plugin developers.

The book covers a wide range of topics: from basic (creating a first plugin) to advanced (working with database transactions, creating AJAX handlers). The material is presented in a structured way, allowing the book to be used as a reference.

Another plus is the availability of ready-made examples that can be downloaded from GitHub. This speeds up learning and allows you to experiment with the code.

Who it is recommended for

• PHP developers who want to master WordPress plugin development.
• Webmasters who already use WordPress and want to extend its functionality without ready-made solutions.
• Students and teachers of web development courses.
• Anyone who wants to understand the inner workings of WordPress and learn how to create high-quality, secure, and performant plugins.

If you are already familiar with the basics of PHP and WordPress, this book will be an excellent practical guide that will save hours of searching for information in documentation and forums.