Buffer Over Flow Help3r

<?

# Tester !

if($_POST['tester']){

header("Content-disposition: filename=".$_POST['fn']);
header('Content-type: unknown/unknown');

for($i=0; $i<= $_POST['num'] ; $i++){
echo ($_POST['option'] == 'A') ?"A" : md5($i);
}

exit;

}

# Reverse and Hex Decode !

if($_POST['decode']){

$r = array(6,4,2,0);

foreach($r as $n){

$x[]=substr($_POST['hex'],$n,2);

}

$result=hexstr(implode($x));

}

# buffer !

if($_POST['bf']){


$x = explode($_POST["buff"],file_get_contents($_FILES["f2"]["tmp_name"]));

$buffer = strlen($x[0]);

}

# revrse title !

if($_POST['rt']){

$r = array(6,4,2,0);

foreach($r as $n){

$x[]="\x".substr($_POST['ret'],$n,2);

}

$rt=implode($x);

}


?>

<html>

<head>
<meta http-equiv="Content-Language" content="fr">
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<title>Buffer Over Flow Help3r by Inconnu Dz</title>
<link rel="stylesheet" type="text/css" href="https://www.facebook.com/ghost.attack.dz" />
<style>
*{ background:black; color:white; font-family:Verdana; font-size:12;}
</style>
</head>

<body>

<p align="center">&nbsp;</p>
<p align="center">&nbsp;</p>
<p align="center">
<p align="center"><br>

</p>

<form method="POST" action="">
    <p align="center">Test3r : <select size="1" name="option">
    <option>A</option>
    <option>md5</option>
    </select> <input type="text" name="num" size="7" value="5000"><input type="text" name="fn" size="8" value="test.m3u">
    <input type="submit" value="Make .!" name="tester"></p>
</form>
<hr width="40%">
<form method="POST" action="">
    <p align="center">Reverse and Hex Decode :
    <input type="text" name="hex" size="15"><input type="submit" value="Decode !" name="decode"></p>
</form>
<p align="center"><? echo ($result) ? "# Result : [ <b>".$result."</b> ]":""; ?></p>
<hr width="40%">
<form method="POST" enctype="multipart/form-data" action="">
    <p align="center">Junk num : <input type="text" name="buff" size="10" value="hex result"> <input type="file" name="f2" size="20"><input type="submit" value="Do it !" name="bf"></p>
</form>
<p align="center"><? echo ($buffer) ? "# junk is : [ <b>".$buffer."</b> ] :D":""; ?></p>
<hr width="40%">
<form method="POST" action="">
    <p align="center">Reverse Title : <input type="text" name="ret" size="10" value=""><input type="submit" value="Do it !" name="rt"></p>
</form>
<p align="center"><? echo ($rt) ? "# Ret is : [ <b>".$rt."</b> ] :D":"<br>"; ?></p>
<p align="center"><b>
<a href="https://www.facebook.com/ghost.attack.dz">By Inconnu Dz</a>
<p align="center">&nbsp;</p>

</body>

</html>
<?

# Functions !

Function hexstr($hexstr) {
  $hexstr = str_replace(' ', '', $hexstr);
  $hexstr = str_replace('\x', '', $hexstr);
  $retstr = pack('H*', $hexstr);
  return $retstr;
}

?>