This article explains “server-side vs. client side” in WordPress development. This distinction, and how the server side and client side interact, is at the core of not only WordPress development, but of any real understanding of how the web works.

This article is an in-depth WordPress shortcode tutorial. We cover what shortcodes are, when to use them, and how to register your own, with full-code custom shortcode examples.

This article explains how to use WordPress’s HTTP API, a set of PHP functions from within WordPress’s function library, to make remote HTTP requests to external resources, such as JSON REST APIs.

This article introduces one of the most important topics in WordPress development: WordPress hooks, including action hooks and filter hooks. Hooks are at the core not only of how WordPress plugins work, but nearly all code in the WordPress ecosystem: most WordPress themes use hooks heavily, as does “WordPress core” itself. WordPress hooks are absolutely a must-know topic in WordPress development.

WordPress development is a hugely useful skill, but it’s also tricky to learn—especially if you learn things out-of-order and try to tackle advanced topics while remaining confused on the fundamentals.

This article explains what I’ve needed to know to work as a freelance WordPress developer.

One of the most maligned features of WordPress is the use of “PHP global variables.” Whether you love them or hate them, global variables probably aren’t leaving WordPress soon. So today we’ll cover all there is to know about them. How to think about them. How you, in PHP, make variables global, access WordPress’s global variables, and a little about the theory and debate about global state in software applications.

Learning WordPress development starts with a lot of key questions, including this one: “What language is WordPress written in?” Another common one is “Should I learn PHP or JavaScript first?” WordPress programming languages is a big topic, but we’ll cover all you need to get started.

This article introduces one of the most important topics in WordPress development: functions.php. The functions file is one of the complex, interesting, and powerful in the arsenal of a WordPress theme. What follows

Welcome! WordPress themes are one of the first and most important topics that one must understand to be good at WordPress development. Themes underlie the entire visual half of WordPress site, but often grow to do even more. We’re hoping your find these free content very helpful, as we think it covers some of the most important concepts in doing WordPress theme development for yourself.