title: How should I make my PHP API work for an iPhone app
body: <p>The title may not be the best way to describe my question.  </p>
  
  <p>I am working on another social network type site similar to a facebook site in PHP.  I would like to eventually pay someone to build me an iPhone/iOS app that will be similar to the facebook iPhone app but work with my PHP site instead.  </p>
  
  <p>So a major concern for me will be to have the iOS app to be as fast as possible for the users.  </p>
  
  <p>From others experience, what would be the best way for my PHP sites API to get the data for the iOS app?  I would think that a simple REST type API that returns results with JSON and XML formats would be the way most sites work with an iPhone/iOS app?  </p>
  
  <p>Is my theory correct or is there a different way to do it?  Please help</p>