title: Retrieving iPad/iPhone serial number via php or javascript
body: <p>I am trying to retrieve an iPad/iPhone serial number via PHP or Javascript for the purposes of locking an internal website down to a set of serial numbers. </p>
  
  <p>The only thing I have seen that comes close is creating an application installing it via iTunes then that application sends the serial number to the browser which seems quite long winded. Does anyone have any ideas or even another possible unique identifier that can be used on these devices. </p>