help with udp socket

[Anon]

This script work fine in my win computer, but when i put into a Linux server i have always de samer error(Error 0).

<?php
$fp = fsockopen("udp://127.0.0.1", 13, &$errno, &$errstr);
if (!$fp) {
echo "ERROR: $errno - $errstr<br>\n";
} else {
fwrite($fp,"\n");
echo fread($fp, 26);
fclose($fp);
}
?>

Can Somebody help me ?
Thank

[Anon]

What version of PHP do the two run? Support for UDP was
added quite late, so perhaps what's running on your Linux
server doesn't support it.