In order to run a Drupal site, the web server you are using must meet minimum technical requirements.

Drupal's vendor-agnostic database abstraction layer provides an API that can query different underlying databases.

Tools and workflows for deploying code and configuration changes from one environment to another with Drupal-specific considerations.

Coding standards provide a set of rules for how your code should be formatted, and best practice guidelines for naming conventions and the location of files.

The process for keeping Drupal core and contributed modules and themes up to date with the latest security and minor version releases.

Learn about Drupal’s configuration system and how to manage configuration with both the administrative user interface and command-line tools.

PHP: Hypertext Preprocessor (PHP) is a popular interpreted programming language that is especially suited for web development. Drupal core and all contributed modules are written in PHP.

As an open source project, Drupal depends on community contributions in many forms including documentation, code, translation, speaking, organizing events, mentoring others, and even donating money.

A site’s main navigation elements, whether they be in the header, footer, or sidebar, are composed of links built using Drupal's menu system. Drupal allows site administrators to build menus while also allowing module developers to add and alter menus in code.

Development environments provide a sandbox where you can work on your application without affecting the live site.

JavaScript files are included by a module or a theme by creating an asset library. Using this asset library system you can selectively choose which files to load, overwrite existing files, or customize them to suit your needs.

Drush is a command line interface that enables you to interact with your Drupal site without clicking around the graphical user interface (GUI).

Drupal provides a standard, secured method for module developers to add forms to a Drupal website. Learn how to use the Form API to build, validate, and submit a custom form.

Devel is a popular developer module containing a variety of developer and debugging utilities including Webprofiler, Devel generate and Kint.

The PhpStorm integrated development environment (IDE) contains dozens of useful features that make working with a Drupal codebase easier.

Hooks allow modules to alter and extend the behavior of Drupal core, or another module. As a Drupal developer, understanding how to implement and invoke hooks is essential.

A block is a reusable widget that is placed inside regions (layout containers) of your theme. Blocks can be used by site administrators on the Block layout admin page or provided by a module using the Plugin API.