a.php

<?php
namespace Acme\Store\Event;

use Symfony\Component\EventDispatcher\Event;
use Acme\Store\Order;

/**
 * The order.placed event is dispatched each time an order is created
 * in the system.
 */
class OrderPlacedEvent extends Event
{
    const NAME = 'order.placed';
    
    const MOHAMED = '5ra';


     public function getMohamed()
    {
        return $this->self::MOHAMED;
    }
}