Wiktor Jarosz

Hi, I’m Wiktor…

…and this is my blog. For now, the only interesting thing you will find here is my WordPress Deep Dive. This will probably change in the future, but I have no idea when.  Enjoy.

WordPress Deep Dive

The WordPress Deep Dive is a 90k-word guide on the technical architecture of WordPress. I wrote it because I was frustrated with the lack of high-quality content on WordPress development that isn’t aimed at complete beginners.

The guide covers all of the most important subsystems of WordPress, often diving head-first into the way the core code works. Some of the most important/interesting topics are:

  • The Request Lifecycle
  • Custom Post Types & Fields
  • Blocks & The Block Editor
  • Themes
  • Plugins
  • Translations
  • User Accounts & Permissions
  • Security (including validation, sanitization, escaping, nonces, XML-RPC, and more)
  • REST API
  • WP-Cron
  • and much more…

There’s also a PDF version. You can access it on my GitHub.