Using the observer with Pomm 2.

observer.php

<?php // observer.php

require __DIR__.'/vendor/autoload.php';

use PommProject\Foundation\Pomm;

// Edit the dsn with your database settings and credentials
$pomm = new Pomm(['my_db' => ['dsn' => 'pgsql://greg/greg']]);

do {
    do {
        sleep(1);
        $notification = $pomm['my_db']
            ->getObserver('pika')
            ->getNotification()
            ;
    } while ($notification === null);

    printf("%s\n", $notification['payload']);
} while ($notification['payload'] !== 'stop');