Description:
------------
The documented behaviour is exactly what I need for a project I am working on, but now the behaviour has changed (even though the docs haven't yet). :(

As far as I can see, there is no way to tell what headers PHP is sending and their values, now.

apache_response_headers() is /not/ a replacement, as it omits Content-Type (the most important header in my situation) and processes the headers PHP passes to it. I really don't want to resort to wrapper functions to maintain my own list. The documentation describes EXACTLY the functionality I want.

I am upset! :(

http://uk.php.net/manual/en/function.headers-list.php

Reproduce code:
---------------
<?php

/* setcookie() will add a response header on its own */
setcookie('foo', 'bar');

/* Define a custom response header
   This will be ignored by most clients */
header("X-Sample-Test: foo");

/* Specify plain text content in our response */
header('Content-type: text/plain');

/* What headers are going to be sent? */
var_dump(headers_list());

?>

Expected result:
----------------
array(4) {
  [0]=>
  string(29) "X-Powered-By: PHP/5.0.0"
  [1]=>
  string(19) "Set-Cookie: foo=bar"
  [2]=>
  string(18) "X-Sample-Test: foo"
  [3]=>
  string(24) "Content-type: text/plain"
}

Actual result:
--------------
array(4) {
  [0]=>
  string(12) "X-Powered-By"
  [1]=>
  string(10) "Set-Cookie"
  [2]=>
  string(13) "X-Sample-Test"
  [3]=>
  string(12) "Content-Type"
}