Journey to the Center of Symfony: HttpKernel Request-Response

Let's not just use Symfony, let's conquer it! In this series, you and I will journey to the center of Symfony by ripping open the source code, adding debug statements and seeing what really happens between the request and the response. It's as geeky-awesome as it sounds.Besides dinosaurs, expect to do the following on our adventure:Create an event listener that does amazing thingsStep through the HttpKernel::handle() method that's used in Symfony and Drupal 8See where event like kernel.request, kernel.response and others are dispatchedLearn about request attributes and the magic they give usFind out what is a sub-request and how to handle itCreate your own sub-request manually