League\Pipeline example.php

<?php 
use League\Pipeline\Pipeline;

interface Registrator{}
interface Notificator{}

class Order implements Registrator,Notificator
{
    protected $order;

    public function getOrder()
    {
        return $this->order;
    }

    public function __toString()
    {
        return 'this is object Order';
    }
}

class RegistratorLog
{
    public function register(Registrator $something)
    {
        echo 'registration log ' . $something . '<br>';
        return $something;
    }

}
class NotificationSms
{
    public function notification(Notificator $something)
    {
        echo 'notification ' . $something . '<br>';
        return $something;
    }
}

class NotificationEmail
{
    public function notification(Notificator $something)
    {
        echo 'notification ' . $something . '<br>';
        return $something;
    }
}

$process = (new Pipeline)
    ->pipe([new RegistratorLog, 'register'])
    ->pipe([new NotificationSms, 'notification'])
    ->pipe([new NotificationEmail, 'notification']);

$result = $process->process( new Order() );


// we will get the result :
// registration log this is object Order
// notification this is object Order
// notification this is object Order
dd($result);