php实现ping

// created by joe lumbroso
// see some other good php3 scripts
// goto

echo "Pinging
";
$to_ping = "dtheatre.com";
$count = 3;
$psize = 65;
echo " Please be patient, this can take a few moments...\n

";
flush();

while (1) {
?>

 
exec("ping -c $count -s $psize $to_ping", $list); 
for ($i=0;$i < count($list);$i++) { 
print $list[$i]."\n"; 
} 
?> 

flush();
sleep(3);
}
?>