gistfile1.php

<?php
require 'vendor/autoload.php';
use OpenCloud\OpenStack;
use OpenCloud\Common\Service\CatalogService;
use OpenCloud\Common\Service\Endpoint;
use OpenCloud\Common\Exceptions;
use Guzzle\Http\ClientInterface;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;

// Rackspace
//test('RAX', 'https://identity.api.rackspacecloud.com/v2.0', 'username', 'password');

// HPCloud
test('HP', 'https://region-a.geo-1.identity.hpcloudsvc.com:35357/v2.0/', 'username', 'password');

class HpService extends CatalogService
{
    
    public function __construct(ClientInterface $client, $type = null, $region = null, $urlType = null)
    {
        $this->setClient($client);
        
        $this->region = $region;
        $this->type = $type;
        $this->urlType = $urlType;
        $this->setEndpoint($this->findHpEndpoint());

        $this->client->setBaseUrl($this->getBaseUrl());

        if ($this instanceof EventSubscriberInterface) {
            $this->client->getEventDispatcher()->addSubscriber($this);
        }
    }

    protected function findHpEndpoint()
    {
        if (!$this->getClient()->getCatalog()) {
            $this->getClient()->authenticate();
        }

        $catalog = $this->getClient()->getCatalog();

        foreach ($catalog->getItems() as $service) {
            if ($service->hasType($this->type)) {
                return Endpoint::factory($service->getEndpointFromRegion($this->region));
            }
        }

        throw new Exceptions\EndpointError(sprintf(
            'No endpoints for service type [%s], name [%s], region [%s] and urlType [%s]',
            $this->type,
            $this->name,
            $this->region,
            $this->urlType
            ));
    }
}

function test($cloud, $identity_url, $username, $password)
{
    try {

        echo "OpenStack TEST<br>";

        $client = new OpenStack($identity_url, array('username' => $username, 'password' => $password));

        if ($cloud == 'RAX') {

            $compute = $client->computeService("cloudServersOpenStack", "DFW");

        } else if ($cloud == 'HP') {

            $compute = new HpService($client, 'Compute', 'US West', 'publicURL');
        }

        var_dump($compute);

    } catch (Exception $e) {

        print "Error!: " . $e->getMessage() . "<br/>";

    }
}