detectar Servidor

[rcl2121]

Con la funcion fsockopen(), pero no se que pasa con el puerto, no esta de mas probarlo.
<?
//idban secandri July 2000 please distribute is as GPL
//
//greeting as usual to desy, nadya, my friend at satunet group!

$phpnet = fsockopen("www.php.net", 80, &$errno, &$errstr, 30);
if(!$phpnet) {
//change with your custom messages
echo "<b>php.net <font color=\"red\">down!!</font></b>\n"; }
else {
echo("<a href=\"http://www.php.net\">php.net</a>");
}

?>


Salu2