Official WordPress developer resources including a code reference, handbooks (for APIs, plugin and theme development, block editor), and more.

Want to know what’s going on inside WordPress? Find out more information about its functions, classes, methods, and hooks.

Dec 10, 2025 · Learn to build a smooth word-switching effect in WordPress by combining four key APIs: HTML API for markup transformation, Interactivity API for animations, Format API for editor controls, …

Jul 30, 2014 · The Plugin Developer Handbook is a resource for all things WordPress plugins. Whether you’re new to WordPress plugin development, or you’re an experienced plugin developer, you should …

Nov 8, 2016 · Using the WordPress REST API you can create a plugin to provide an entirely new admin experience for WordPress, build a brand new interactive front-end experience, or bring your …

May 2, 2019 · This handbook is focused on block development and is divided into five major sections. Getting Started: For those just starting out with block development, this is where you can get set up …

Feb 21, 2025 · This section helps you get up and running with Secure Custom Fields (SCF). Whether you're new to WordPress development or an experienced…

Jul 2, 2025 · Here you’ll find everything you need to know to sound great on the Developer Blog. You’ll also find the whole publishing process—every step from proposing a topic and getting it approved, to …

Jul 30, 2014 · The Theme Developer Handbook is a repository for all things WordPress themes. Whether you’re new to WordPress themes, or you’re an experienced theme developer, you should …

Nov 21, 2023 · A code editor and development environment are the foundational pieces of creating a WordPress theme. However, there are other tools and resources that you will likely find useful for …