Is there any way to integrate php into RabbitWeb ?

Is there any way to use php on a Rabbit 33xx server or other way to provide server-side driven data updates to a client (without reloading an entire web page) ?

No, but you can use JavaScript and AJAX on the page and have it send a request for JSON-formatted data. I don’t believe there’s a canned solution for the server to notify the client of new data, other than having the client poll for updates.