// Create a Pushwoosh client
$pushwoosh = Pushwoosh::create()
    ->setApplication('XXXX-XXX')
    ->setAuth('xxxxxxxx');
// Create a request for the '/createMessage' Web Service
$request = CreateMessageRequest::create()
    ->addNotification(Notification::create()->setContent('Hello Jean !'));
// Call the REST Web Service
$response = $pushwoosh->createMessage($request);
// Check if its ok
if($response->isOk()) {
    print 'Great, my message has been sent !';
} else {
    print 'Oups, the sent failed :-('; 
    print 'Status code : ' . $response->getStatusCode();
    print 'Status message : ' . $response->getStatusMessage();
}