Last updated December 11, 2018

Each form is defined by a controller, a class that implements the \Drupal\Core\Form\FormInterface. Form controllers declare the unique ID of the form, the $form array that describes the content of the form, how to validate the form, and what to do with the data collected.

In this tutorial we'll:

  • Define a new form controller class
  • Implement the required methods to describe a form
  • Add a route that can be used to access our form

By the end of this tutorial you should be able to define a form that adheres to the FormInterface requirements and know where to find more information about how to further customize your form controller.