title: why $_SERVER["HTTP_REFERER"] doesn't work in Android Webview?
body: <p>I have an android app which shows a <code>webview</code>. the php funcion <code>$_SERVER["HTTP_REFERER"]</code> doesn't work in the android app, but if i visit the same webpage with the stock browser (like chrome) it works</p>
  
  <p>is there a way to solve this problem?</p>