Description:
------------
get_headers("http://bugs.php.net/welcometochina.php")

the result is like this:
Warning: get_headers (http://bugs.php.net/welcometochina.php): failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found

but i think it should be like this:
HTTP/1.1 404 Not Found
Content-Length: 1635
Content-Type: text/html
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
Date: Fri, 03 Mar 2006 11:30:47 GMT
Connection: close

and other http status code such as 403

i hate to touch you in others method,here is my code for that problem:

   function get_headers($url,$format=0) {
       $url=parse_url($url);
       if (empty($url["path"])) {
       	   $url["path"]="/";
       }
       print_r($url);
       $end = "\r\n\r\n";
       $fp = fsockopen($url['host'], (empty($url['port'])?80:$url['port']), $errno, $errstr, 30);
       if ($fp) {
           $out  = "GET {$url["path"]} HTTP/1.1\r\n";
           $out .= "Host: ".$url['host']."\r\n";
           $out .= "Connection: Close\r\n\r\n";
           $var  = '';
           fwrite($fp, $out);
           while (!feof($fp)) {
               $var.=fgets($fp, 1280);
               if(strpos($var,$end))
                   break;
           }
           print $var; 
           fclose($fp);

           $var=preg_replace("/\r\n\r\n.*\$/",'',$var);
           $var=explode("\r\n",$var);
           if($format) {
               foreach($var as $i) {
                   if(preg_match('/^([a-zA-Z -]+): +(.*)$/',$i,$parts))
                       $v[$parts[1]]=$parts[2];
               }
               return $v;
           }
           else
               return $var;
       }
   }

here i didn't conside the loction of code 301,because i think 
it's not the true URI ,just return the 301 response is OK 

at last, sorry for my english,welcome to china 2008! ;-p