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EventSource

EventSource is a simple library for PHP 5.4+ to create event source objects.

Usage

EventSource trait

When you wish to make one of your classes an event source, simply use the EventSource trait in them and call the initializer method.

class SomeClass {
    use EventSource\EventSource;

    public function __construct() {
        //initialize defines the events that can be used
        $this->initialize(['fooEvent', 'barEvent']);
    }

    public function someMethod() {
        $this->raise('fooEvent', $someOptionalParameter);
    }
}

You can use the on($eventName, $callback) method to define event handlers which will be notified if the given event is raised.

$someObject = new SomeClass();
$someObject->on('fooEvent', function($someParameter = null) {
    //do something
});

You can also remove event handlers using the remove($eventName, $callback) method.

Event class

Alternatively, you have the option to manually create Event objects that are used by EventSource to manage the event handlers. The Event class has the following methods:

• on($callback) - register a new callback to handle the event
• remove($callback) - removes a previously registered callback
• raise(optional $parameter) - raises the event

One downside is when using the Event class directly is that raise() is a public method, so any outside code may trigger events.

Installation

Using Composer

"require": {
    "bugadani/event_source": "1.*"
}