PHP code example of webino / event-emitter

1. Go to this page and download the library: Download webino/event-emitter library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php. 
    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

webino / event-emitter example snippets


use Webino\EventEmitter;

$emitter = new EventEmitter;

// registering closure event handler
$emitter->on('example', function () {
    return 'Hello';
});

// emitting custom event
$event = $emitter->emit('example');

/** @var \Webino\EventResults $results */
$results = $event->getResults();

echo $results;

// => Hello


use Webino\EventEmitter;

$emitter = new EventEmitter;

$handler = function () {
    return 'Hello';
};

$emitter->on('example', $handler);

// remove handler for all events
$emitter->off($handler);

// remove all handlers for an event
$emitter->off(null, 'example');

// remove all handlers for all events
$emitter->off();


use Webino\EventEmitter;

$emitter = new EventEmitter;

$emitter->on('example', function () {
    return 'Special';
});

$event = $emitter->emit('example', function ($result) {
    // when result meets 

use Webino\EventEmitter;

$emitter = new EventEmitter;

$emitter->on('example', function () {
    return 'Begin';
}, $event::BEGIN);

$emitter->on('example', function () {
    return 'Before';
}, $event::BEFORE);

$emitter->on('example', function (Event $event) {
    return 'Main';
}, $event::MAIN);

$emitter->on('example', function () {
    return 'After';
}, $event::AFTER);

$emitter->on('example', function () {
    return 'Finish';
}, $event::FINISH);

// emitting custom event
$event = $emitter->emit('example');

/** @var \Webino\EventResults $results */
$results = $event->getResults();

echo $results;

// => BeginBeforeMainAfterFinish


use Webino\EventEmitter;
use Webino\EventHandlerInterface;
use Webino\EventHandlerTrait;

class ExampleEventHandler implements EventHandlerInterface
{
    use EventHandlerTrait;

    protected function initEvents(): void
    {
        $this->on('example', function () {
            return 'Foo';
        });

        $this->on('example', function () {
            return 'Bar';
        });
    }
}

// emitting custom event
$event = $emitter->emit('example');

/** @var \Webino\EventResults $results */
$results = $event->getResults();

echo $results;

// => FooBar

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