<php>
    $headers = get_headers('http://google.de');
echo "<pre>";
var_dump($headers);
echo "</pre>";
echo $response = substr($headers[0], 9, 3);
</php>

  [0]=>
  string(30) "HTTP/1.0 301 Moved Permanently"
  [1]=>
  string(31) "Location: http://www.google.de/"
  [2]=>
  string(38) "Content-Type: text/html; charset=UTF-8"
  [3]=>
  string(35) "Date: Tue, 03 May 2016 13:20:12 GMT"
  [4]=>
  string(38) "Expires: Thu, 02 Jun 2016 13:20:12 GMT"
  [5]=>
  string(38) "Cache-Control: public, max-age=2592000"
  [6]=>
  string(11) "Server: gws"
  [7]=>
  string(19) "Content-Length: 218"
  [8]=>
  string(31) "X-XSS-Protection: 1; mode=block"
  [9]=>
  string(27) "X-Frame-Options: SAMEORIGIN"
  [10]=>
  string(15) "HTTP/1.0 200 OK"
  [11]=>
  string(35) "Date: Tue, 03 May 2016 13:20:12 GMT"
  [12]=>
  string(11) "Expires: -1"
  [13]=>
  string(33) "Cache-Control: private, max-age=0"
  [14]=>
  string(43) "Content-Type: text/html; charset=ISO-8859-1"
  [15]=>
  string(114) "P3P: CP="This is not a P3P policy! See https://www.google.com/support/accounts/answer/151657?hl=en for more info.""
  [16]=>
  string(11) "Server: gws"
  [17]=>
  string(31) "X-XSS-Protection: 1; mode=block"
  [18]=>
  string(27) "X-Frame-Options: SAMEORIGIN"
  [19]=>
  string(223) "Set-Cookie: NID=79=Xqo8h2r62eW5aHXIVSMlyOakWhPypYhOZI7IkcJqnRwTDwOSjOdXG14G3C0NKv_lhFpvp3dlAhFoWRUM5CUi2-JkfFjW1YncL0Gc7_d3K42sbKWh7eDrEdx7gCtuCGZf; expires=Wed, 02-Nov-2016 13:20:12 GMT; path=/; domain=.google.de; HttpOnly"
  [20]=>
  string(95) "Set-Cookie: CONSENT=CG.253010; expires=Fri, 03-Jun-2016 13:20:12 GMT; path=/; domain=.google.de"
  [21]=>
  string(19) "Accept-Ranges: none"
  [22]=>
  string(21) "Vary: Accept-Encoding"
}