This patch provides a forwards-compatibility release that adapts zend-eventmanager to work as a PSR-14 EventDispatcher. It does so by doing the following:

• Creating package-specific ListenerProviderInterface and EventDispatcherInterface versions that work with PHP 5.6.
• Moving all listener aggregation into classes within a ListenerProvider subnamespace; this includes both the listener attachment previously in the EventManager instance as well as the SharedEventManager instance.
• Renaming "listener aggregates" to "listener subscribers" in the new ListenerProvider subnamespace.
• Adapting EventManager to consume listener providers. By default, it will create a default priority-based listener provider, and have its various listener attachment methods proxy to that provider; it then aggregates that provider with the SharedEventManager (which is itself a provider now) in order to retrieve listeners. This is done in such a way that behavior is completely backwards compatible with current usage.
  • A new named constructor, createUsingListenerProvider(), allows providing a specific listener provider for use with the EventManager. If the provider is attachment capable, the various listener attachment methods will proxy to it; otherwise, they will raise an exception.

The patch also deprecates a number of features, including:

• Most interfaces, including the EventInterface.
• The entire "shared event manager" concept (this can be accomplished via event object hierarchies instead)

TODO

• Write changelog entries
• Create documentation of new features
• Document how to start migrating to the new features in order to prepare for version 4

Originally posted by @weierophinney at zendframework/zend-eventmanager#73