EventDispatcher Component
The EventDispatcher component provides tools that allow your application components to communicate with each other by dispatching events and listening to them.
Resources
* [Documentation](https://symfony.com/doc/current/components/event_dispatcher.html) * [Contributing](https://symfony.com/doc/current/contributing/index.html) * [Report issues](https://github.com/symfony/symfony/issues) and [send Pull Requests](https://github.com/symfony/symfony/pulls) in the [main Symfony repository](https://github.com/symfony/symfony)