Beginner LevelLaravel
How do Events and Listeners decouple application side-effects in Laravel?
❓ Interview Prompt: Explain Events, Listeners, EventServiceProvider / automatic event discovery, and dispatching events via event() or Event::dispatch().
Events allow you to subscribe and listen for various application triggers, decoupling core domain logic from auxiliary side-effects.
Architecture:
•
Event Class ('OrderPlaced'): Plain PHP data object holding event payloads.
•
Listener Class ('SendOrderConfirmationEmail'): Contains 'handle(OrderPlaced $event)' execution logic.
•
Dispatching: Execute 'OrderPlaced::dispatch($order)'. Core checkout code finishes without knowing about email sending!
Code Implementation Example
php
<?php
// Dispatching Event in Controller
use AppEventsUserRegistered;
public function register(Request $request)
{
$user = User::create($request->validated());
UserRegistered::dispatch($user);
return response()->json($user);
}💡Dispatching domain event to decouple registration side-effects.
🎯 Interview Key Takeaway
Use Events and Listeners to separate core domain code from auxiliary side-effects like emails and log auditing.
#Events#Listeners#Decoupling#Beginner
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