title: url accessible only from mobile
body: <p>i have web and mobile application. On my web application i have url address www.myweb.com/mobile/update which generate xml for mobile application (java application, xml is used for updating data in this app). Is some way how to made these url accessible only from mobile (java application) and restrict it for others web users? I am using php and apache server. 
  Thanks for you advices and sorry form my english. ;)</p>