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Example code of nathanburkett/event-dispatcher

Informations about the package event-dispatcher

Event Dispatcher

CircleCI codecov

A PSR-14 implementation which uses a Resolver to inject dependencies from a container when resolving EventListeners.

A ListenerProvider and observes priority from highest to lowest.

This means a ListenerProvider can already have multiple Subscriptions but could add another at run time whose priority facilitates the EventListener being handled first:

Installation

Via Composer

Usage

Events are paired with EventListeners through Subscriptions. Subscriptions take an Event class, a Listener class, and an optional priority assignment of where the Listener should be called in relation to other Listeners for the same Event in a ListenerProvider.

ListenerProviders hold Subscriptions and are also responsible for prioritizing and resolving Listeners so their callable is consumable.

An attach new ones before or during execution. The EventDispatcher facilitates an Event moving through the EventListener invocation pipeline and will halt further EventListener calls if the Event's propagation should be stopped.

An making their way to an EventDispatcher.

Basic Implementation

Then a ListenerProvider can track Subscriptions:

An EventDispatcher must be made aware of the new ListenerProvider

And finally an EventEmitter needs to consume the EventDispatcher and is ready to send Events

All versions of event-dispatcher with dependencies

PHP Build Version
Package Version
Requires php Version >=7.2
psr/event-dispatcher Version ^1.0
psr/container Version ^1.0
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