title: Twilio call forwarding
body: <p>I have a question about Twilio's call forwarding concept.</p>
  
  <p>I want to create an application that lets users forward their existing numbers to Twilio, which processes the necessary information, and forwards the call back to the user.</p>
  
  <p>However, when I try to implement this, an infinite loop happens: The call is forwarded to Twilio, which forwards the call back to the user, which forwards the call to twilio...</p>
  
  <p>How would I implement this on the Twilio side, since it is difficult to implement any code on the user side?</p>
  
  <p>Here is my code on Twilio that forwards the call back to the user.</p>
  
  <pre><code>&lt;?php
      header("content-type: text/xml");
  ?&gt;
  &lt;?xml version=\"1.0\" encoding=\"UTF-8\"?&gt;
  &lt;Response&gt;
    &lt;Say&gt;Hello User&lt;/Say&gt;
    &lt;Dial&gt;+1973XXXXXXX&lt;/Dial&gt;
  &lt;/Response&gt;
  </code></pre>