title: Can I login to ASP.NET (with Forms Authentication) and then transfer that 'login' to a PHP application?
body: <p>Our website runs on ASP.NET v4 and users log in user Forms authentication.</p>
  
  <p>We are considering purchasing a web application that will add to our services. The only problem is that this new website is written in PHP.</p>
  
  <p>We would like users to login to our ASP.NET site and then navigate to the PHP site. The PHP site should notice that users are logged-in though. So we probably need to transfer the ASP.NET SessionID cookie and somehow use that to verify whether or not the user has been authorized.</p>
  
  <p>Does this sound feasible? Or am I barking up the wrong tree?</p>