File Source for upload.php

<?php
/**
* @package linea21.core
* @subpackage library
* @author Simon Georget <simon@linea21.com>
* @version $id SVN
* @access public
* @license http://opensource.org/licenses/gpl-3.0.html
*/
//header('Content-type: application/json');
//header('Content-type: text/plain');
session_start();
@set_time_limit(0);
include_once('../config/define.php');
include_once('../lib/lib_common.php');
include_once('../lib/functions_auth.php');
$foldername = $_REQUEST['foldername'];
$id = $_REQUEST['id'];
$file = $_FILES['file'];
if(!CookieWorkshopid($id)) die('no way!');
if (!empty($_FILES)) {
$tempFile = $_FILES['file']['tmp_name'];
$file = $_FILES['file'];
$filename_parts = pathinfo($_FILES['file']['name']);
$filename = cleanString($filename_parts['filename']).'.'.$filename_parts['extension'];
$targetPath = dirname(__FILE__). DIRECTORY_SEPARATOR . 'userfiles'. DIRECTORY_SEPARATOR . 'workgroups' . DIRECTORY_SEPARATOR . $foldername . DIRECTORY_SEPARATOR;
$targetFile = str_replace('//','/',$targetPath) . $filename;
if (in_array(strtolower($filename_parts['extension']),explode(',', MEDIA_ALLOWED_EXT))) {
if(!file_exists(str_replace('//','/',$targetPath)))
mkdir(str_replace('//','/',$targetPath), 0755, true);
move_uploaded_file($tempFile,$targetFile);
echo '{"name":"'.$filename.'","type":"'.$file['type'].'","size":"'.$file['size'].'"}';
} else {
echo '{"error" : "File transfer error"}';
}
}
?>

Source for file upload.php