The Symfony Form component offers many features out of the box. It covers 80% of use cases, but how do you deal with the 20% left? If you have read the documentation, you probably know how to use it. But do you know how it works?

To implement your business on top of Symfony Form, you must know how it works under the hood, and how you can extend it. I will illustrate those underlying concepts through a series of standard use cases:

- Make a list of items sortable;
- Hide or disable fields based on user permissions;
- (more, to be discovered during the conference).

This presentation will give you insights into how things work inside the Form component, and how you can hook in it.