The WordPress Codex is the the online manual for WordPress and a living repository for WordPress information and documentation. Whether you’re just starting out or you are a WordPress veteran — the Codex is an invaluable resource.
Want to know what’s going on inside WordPress? Search the Code Reference for more information about WordPress’ functions, classes, methods, and hooks.
Smashing Magazine is one of the longest running and most-respected web development blogs in the world. Their WordPress category is a legendary resource for articles on developing clean, smart and fast websites with WordPress
OK, so the WordPress Codex ain’t perfect — and that’s where QueryPosts comes in — it features a better search function and inline source code. Used in combination with the Codex there’s nothing you can’t find out about the WordPress API.
WP Beginner is a fantastic site for tips, tricks and hacks to allow WordPress beginners to improve their skills and build great websites.
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