PHP ~ File Upload

HTML Code

<form method="post" action="action/new_filedownload.php" enctype="multipart/form-data" >

<input type="file" name="file">

<input type="submit" value="upload" />

</form>

PHP Code

$tmp = $_FILES["file"]["tmp_name"];

$name = $_FILES["file"]["name"];

copy($tmp,'filedownload/'.$name]);

get File extension

$xx = explode(".",$name);

$last = count($xx) - 1;

$fileExtension = $xx[$last];