How to use events in CakePHP?

@jasen 

To use events in CakePHP, follow the steps below:

1. Create an event

Events represent the things that happen in your application that you want other parts of your application to know about. You can create an event using the following syntax:

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use CakeEventEvent;

$event = new Event('Model.User.register', $this, ['user' => $user]);

In this example, we create an event with the name "Model.User.register", and we pass in the user object as a parameter.

1. Trigger an event

To trigger an event, you can use the following syntax:

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$this->getEventManager()->dispatch($event);

This will dispatch the event to all the event listeners that have been registered for that event.

1. Listen for an event

To listen for an event, you need to create an event listener. An event listener is simply a function that gets called when the event is triggered. You can create an event listener using the following syntax:

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use CakeEventEvent;

public function afterRegister(Event $event)
{
    $user = $event->getData('user');
    // Code to handle the event
}

In this example, we create an event listener called "afterRegister". This function will be called whenever the "Model.User.register" event is triggered. We can access the user object that was passed as a parameter using the getData() method.

1. Register event listener

To register an event listener, you can use the following syntax:

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EventManager::instance()->on('Model.User.register', ['priority' => 10], [$this, 'afterRegister']);

In this example, we register the "afterRegister" function as the event listener for the "Model.User.register" event. We also specify a priority of 10 for the listener. This determines the order in which the listeners will be called when the event is triggered.

By following these steps, you can use events in CakePHP to decouple your application logic and make it more modular and flexible.