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Example code of unique/events

Informations about the package events

Events

This package provides a very basic events system.

Installation

This component requires php >= 7.4. To install it, you can use composer:

Usage

Let's say you want to create a file loader, which will load the file and throw an event with file's content.
In that case you first have to created a simple event object. Let's call it FileLoadEvent.

Now let's write a simple file loader class:

Now you can use your defined event functionality by adding an event handler:

What this does is it defines an event handler for EVENT_AFTER_LOAD event. The handler does some logic and marks the event as handled.
If you were to have more than one handler defined for the same event, events would propagate up until all handlers have been called or until one of the handlers sets handled attribute to true.

Documentation

on( string $event, $callback )

Sets a new handler for the specified event type.

trigger( string $event_name, EventObjectInterface $event )

Triggers the specified event. The first assigned handler will be called first. If it does not set EventObjectInterface::setHandled() the second handler will be called and so on, until all the handlers have been called or setHandled( true ) has been set.

off( string $event, $callback = null )

Removes an event handler from the object. If no handler is provided all handlers will be removed.

All versions of events with dependencies

PHP Build Version
Package Version
Requires php Version >=7.4
ext-dom Version *
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