title: How can I determine via php whether the connection is secure?
body: <p>How can <strong>php</strong> be used <strong>to determine</strong> whether the <strong>connection</strong> used <strong>by the user is secure</strong> (e.g. via a VPN), as shown in the picture? </p>
  
  <p><a href="https://i.stack.imgur.com/iX5zd.png" rel="nofollow noreferrer">Click here to see the example img</a></p>
  
  <p>TIA</p>