What languages does a WordPress developer really need to know?
Working with WordPress goes far beyond installing themes and plugins. If the idea is to act as a developer (and not just an advanced user), there are minimum technical requirements that you need to master — and that doesn’t mean knowing everything, but knowing enough to understand, modify and create safely and autonomously.
🔹 HTML + CSS Base of the entire structure and style. Knowing how to structure content, apply styles and understand good practices is the first step.
🔹PHP WordPress is built on PHP. Even if you don’t create plugins from scratch, you’ll need to understand how themes and functions work behind the scenes.
🔹 JavaScript (basic to intermediate) Many modern themes use JS for interactivity. And with the block editor (Gutenberg), knowledge of JS has become even more relevant.
🔹 MySQL (basic) Knowing how the WordPress database is structured helps you create custom queries, filters and optimizations.
🔹 WordPress Core, Hooks and Template Hierarchy Knowing what a filter, action is, how functions.php works, the template hierarchy… is what separates a customizer from a developer.
🔹 Git + good versioning practices If you are going to collaborate on projects or maintain a professional portfolio, knowing Git is essential.
🔹 Minimum knowledge of security and performance It doesn’t need to be DevOps, but it needs to avoid mistakes: SQL Injection, sanitization, validation, correct use of scopes and native resources.
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💬 And you, would you add any essential skills? 👇 Comment there or tag someone who is starting out in the area.