apache_response_headers
    (PHP 4 >= 4.3.0, PHP 5)
apache_response_headers -- Fetch all HTTP response headers
Description
array 
apache_response_headers ( void  )
   Fetch all HTTP response headers.
  
Return Values
   An array of all Apache response headers on success, or FALSE on failure.
  
Examples
   
Example 1. apache_response_headers() example 
<?php print_r(apache_response_headers()); ?>
 |  
 The above example will output 
something similar to: Array
(
    [Accept-Ranges] => bytes
    [X-Powered-By] => PHP/4.3.8
) |  
  | 
  Notes
Note: As of PHP 4.3.3 you can use this function with the
NSAPI server module in Netscape/iPlanet/SunONE
webservers, too.