Explain Events and Listeners ?
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Answer / surbhi
Events and Listeners serve a great way to decouple a web application, since one event can have multiple listeners which are independent of each other.
The events folder created by the artisan command includes the following two files
1. : event.php
2. :SomeEvent.php.
Event.php
<?php
namespace AppEvents;
abstract class Event{
//
}
As mentioned above, event.php includes the basic definition of class Event and calls for namespace AppEvents. Please note that the user defined or custom events are created in this file.
SomeEvent.php
For example, if we need to initialize order variable in the constructor for registering an event, we can do it in the following way -
public function __construct(Order $order)
{
$this->order = $order;
}
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Answer / Rajendra Kumar Nepane
Events are instances of the PHP Event Sourcing principle, where an object is created when something significant happens. Listeners are functions that get called when a specific event occurs. In Laravel, events are dispatched using the event facade, and listeners are registered with event service provider. This allows for decoupling components within the application.
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