Curated resource guide
WordPress Plugin Development Resources
Build WordPress plugins that remain secure, maintainable, and compatible as sites evolve. This collection brings together practical references for plugin architecture, hooks, data storage, admin interfaces, APIs, testing, packaging, updates, and the engineering decisions behind dependable extensions.
Scope
What this guide covers
- Plugin architecture and lifecycle
- hooks, actions and filters
- activation, deactivation and uninstall
- Settings API and Options API
- admin screens and menus
- metadata and custom data storage
- custom database tables
- REST endpoints
- AJAX
- cron and scheduled tasks
- background processing
- roles and capabilities
- nonces, validation, sanitization and escaping
- internationalization
- dependency management with Composer
- autoloading and namespaces
- JavaScript and build tooling
- plugin assets
- block integration
- plugin interoperability
- WordPress coding standards
- automated testing
- debugging
- performance
- security
- packaging
- readme.txt and Plugin Directory requirements
- licensing
- updates
- migrations
- backward compatibility
- deprecation
- telemetry and privacy
- distribution and commercial plugin architecture
Selected references
Curated resources
Links open the original publisher so you can use the complete, current material in context.
- 01Recommended starting point
WordPress Plugin Developer Handbook
The official starting point for building WordPress plugins. It connects the core concepts, APIs, security practices, and distribution guidance in one maintained handbook.
developer.wordpress.org - 02
Plugin Basics
A practical introduction to plugin files, headers, lifecycle hooks, WordPress APIs, and how plugins are loaded. It is a useful first build before moving into larger architecture.
developer.wordpress.org - 03
Hooks: Actions and Filters
The official explanation of actions, filters, callbacks, and custom hooks. Read this to understand how a plugin should extend WordPress without modifying Core.
developer.wordpress.org - 04
Security for WordPress Developers
WordPress security guidance built around validating input, sanitizing data, escaping output, and checking capabilities. It gives plugin code a sound defensive baseline.
developer.wordpress.org - 05
Plugin Settings
A focused guide to settings screens, the Options API, and the Settings API. It helps keep configuration storage and administration code aligned with WordPress conventions.
developer.wordpress.org - 06
Plugin Metadata
Official guidance for working with post metadata and custom meta boxes. The examples clarify when metadata fits a plugin and how to manage it through WordPress APIs.
developer.wordpress.org - 07
WordPress REST API Handbook
The main reference for WordPress REST concepts, routes, authentication, schemas, requests, and responses. It is essential when a plugin exposes data or integrates with an external application.
developer.wordpress.org - 08
Detailed Plugin Guidelines
The rules used for plugins hosted in the WordPress.org directory. Even for privately distributed work, they provide a valuable review of licensing, security, behavior, and user trust.
developer.wordpress.org