php实现ping (转)

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　　 <?php

    //  created by joe lumbroso
    //  see some other good php3 scripts
    //  goto http://www.dtheatre.com/scripts

echo "<font color=\"red\"><blink><b>Pinging</b></blink></font><br>";
$to_ping = "dtheatre.com";
$count = 3;
$psize = 65;
echo "   Please be patient, this can take a few moments...\n<br><br>";
flush();

while (1) {
?>
<pre>
<?
exec("ping -c $count -s $psize $to_ping", $list);
for ($i=0;$i < count($list);$i++) {
   print $list[$i]."\n";
}
?>
</pre>
<?
flush();
sleep(3);
}
?>

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