Symfony - how to start a listener so that it is launched when a specific method is called in the controller?

Question

symfony

Hello everyone, I would like to understand the magic of the symphony.

How does the listener work in symphony?
For example, you need to do something if there was a request for a specific method in the controller.
How to trigger it?

Answer 1

What magic?
Symfony events
Creating listeners
An example of calling an event
A simple example of implementing an Event Dispatcher
You can subscribe to this event or this and call your logic if the desired method is called