Working with asynchronous errors in PHP

asynchronous-errors-in-php-03.php

<?php

#[Asynchronous("async")]
#[EventHandler]
class NotificationServiceHandler
{
    public function __invoke(OrderWasPlaced $message)
    {
        // send an SMS message!
    }
}

#[Asynchronous("async")]
#[EventHandler]
class PaymentServiceHandler
{
    public function __invoke(OrderWasPlaced $message)
    {
        // take a payment from credit card
    }
}