Uploading files / processing with a PHP script

["Ron Piggott (PHP)" <ron.php@xxxxxxxxxxxxxxxxxx>]

When I upload a file into an application I am writing with the HTML form
command

<INPUT NAME="userfile" TYPE="file">

and then give the PHP command

move_uploaded_file( $userfile , $destination_file_name);

the owner of the file is 'www'.  Is there any way I am able to
automatically change the owner of the file to my FTP login identity (for
example 'rpiggott')

Ron