The controller first bootstraps the application using a kernel class (``AppKernel``

in this case). Then, it creates the ``Request`` object using the PHP's global

variables and passes it to the kernel. The last step is to sendback totheuser

the responsecontents returned by the kernel.

variables and passes it to the kernel. The last step is to send theresponse

contents returned by the kernel back to the user.

.. _the-app-dir:

(more on this later).

Autoloading is handled automatically via `Composer`_, which means that you

can use any PHPclasses without doing anything at all! All dependencies

can use any PHPclass without doing anything at all! All dependencies

are stored under the ``vendor/`` directory, but this is just a convention.

You can store them wherever you want, globally on your server or locally

in your projects.