I know iPhone apps. operate like sandboxes. Meaning that they don't have access to other apps' files. And I have also managed to open a website in Safari from a Native App() using:
 openURL:[NSURL URLWithString: Website_Address] 
There are four Native apps that I have seen being opened from safari.
- App Store app
 - Maps app
 - Email app
 - Phone app
 
Is there a method of opening my own app from an iphone website in Safari(maybe some html/xml/php etc code)?