What Is the Codex?
The WordPress Codex is an online wiki for WordPress documentation located on WordPress.org. WordPress.org describes the Codex as an “encyclopedia of WordPress knowledge.” You can visit the WordPress Codex by going to http://codex.wordpress.org or by clicking the Docs tab in the header of WordPress.org.
The Codex is a wiki-based website, which means anyone can create, edit, and contribute to the articles within the Codex. The Codex is jam-packed with useful knowledge covering all aspects of WordPress. From, “Getting Started with WordPress,” to more advanced developer topics, the Codex is an essential resource for anyone looking to learn more about WordPress.
The Codex is available in many different languages. To find a Codex version translated in your language, visit the Multilingual Codex page at http://codex.wordpress.org/Multilingual_ Codex. You can also contribute to the Codex and help expand on any language or create your own language if it is not listed.