(PECL pecl_http >= 0.10.0)
http_parse_headers — Parse HTTP headers
$header
   )Parses HTTP headers into an associative array.
headerstring containing HTTP headers
   Returns an array on success or FALSE on failure.
  
Example #1 Using http_parse_headers()
<?php
$headers = "content-type: text/html; charset=UTF-8\r\n".
  "Server: Funky/1.0\r\n".
  "Set-Cookie: foo=bar\r\n".
  "Set-Cookie: baz=quux\r\n".
  "Folded: works\r\n\ttoo\r\n";
print_r(http_parse_headers($headers));
?>
The above example will output:
Array
(
  [Content-Type] => text/html; charset=UTF-8
  [Server] => Funky/1.0
  [Set-Cookie] => Array
  (
    [0] => foo=bar
    [1] => baz=quux
  )
  [Folded] => works
    too
)