Drupalize.Me: Part 1: HttpKernel in Drupal (Spotlight on Symfony in Drupal)

For over a decade, Drupal has been using Symfony Components. In 2015, with the release of Drupal 8, these components became a part of Drupal's core software. It's possible to build complex Drupal sites without worrying about what these components do. But learning about the system we're using will make us better developers of Drupal sites and other PHP applications.

In this first part of a 3-part series, we'll explore how Symfony helps Drupal with its HttpKernel component. We'll look at the component itself and how Drupal uses it to coordinate the request/response cycle.