Is the data stored in a database on your web server? If so, you can setup a REST web service with a PHP interface to grab the data for you. From your app you can make the request to your web service through an AJAX call.
If this is the solution you are looking for then I can post an example of the call to the web service from the app. You can also search these forums for ‘web service’ and you should find an example from an earlier post of mine.