title: How to get all the HTTP response headers of the current page in php
body: <p><code>headers_list()</code> and <code>apache_reponse_headers()</code> return a greatly reduced list of the actual response headers, even after <code>headers_sent()</code> and <code>get_headers()</code> would make another HTTP request.</p>
  
  <p>So, how can you get the complete list of response headers that are to be sent with the current page, or are these additional response headers, as set by the server, only set long after PHP has finished?</p>