Description
array 
get_headers ( string url [, int format] )
   get_headers() returns an array with the headers sent
   by the server in response to a HTTP request. Returns FALSE on failure
   and an error of level E_WARNING will be issued.
  
   If the optional format parameter is set to 1,
   get_headers() parses the response and sets the array's
   keys.
  
Note: 
    Since PHP 5.1.3 this function uses the default stream context, which can
    be set/changed with the stream_context_get_default()
    function.
   
   
Example 1. get_headers() example 
<?php $url = 'http://www.example.com';
  print_r(get_headers($url));
  print_r(get_headers($url, 1)); ?>
 |  
 The above example will output 
something similar to: Array
(
    [0] => HTTP/1.1 200 OK
    [1] => Date: Sat, 29 May 2004 12:28:13 GMT
    [2] => Server: Apache/1.3.27 (Unix)  (Red-Hat/Linux)
    [3] => Last-Modified: Wed, 08 Jan 2003 23:11:55 GMT
    [4] => ETag: "3f80f-1b6-3e1cb03b"
    [5] => Accept-Ranges: bytes
    [6] => Content-Length: 438
    [7] => Connection: close
    [8] => Content-Type: text/html
)
Array
(
    [0] => HTTP/1.1 200 OK
    [Date] => Sat, 29 May 2004 12:28:14 GMT
    [Server] => Apache/1.3.27 (Unix)  (Red-Hat/Linux)
    [Last-Modified] => Wed, 08 Jan 2003 23:11:55 GMT
    [ETag] => "3f80f-1b6-3e1cb03b"
    [Accept-Ranges] => bytes
    [Content-Length] => 438
    [Connection] => close
    [Content-Type] => text/html
) |  
  |