title: PHP : Detecting USB device
body: <p>I'm trying to use PHP to store username and password to a text file on a USB thumb drive. So when user comes back to sign in with USB key a pop should open and should prompt for username and password. So my question is how can i detect the USB thumbdrive using PHP. So it is possible with Client or ServerSide. And my Operating system is Windows 7.</p>
  
  <p><strong>I found similar question on <a href="https://stackoverflow.com/questions/4758772/is-it-possible-to-detect-usb-devices-using-php">stackoverflow</a> about using shell scripting,but could'nt understand,so can some help me understand</strong></p>
  
  <p><strong>Edit</strong>: I asked for explanation from possible duplicate question , and please dont vote for closing this question !!!</p>