take a look at the man page for [man]copy[/man] and [man]move_uploaded_file[/man], there are ways to grab file information like
$FILES['nameoffield']['tmp_name'] //the temp name of the file til its moved
$FILES['nameoffield']['name'] //the real name of the file
$FILES['nameoffield']['type'] //the type of file, ie. image/jpeg
$FILES['nameoffield']['size'] //the size of the file
usually i do either copy of move_uploaded_file like
copy($FILES['nameoffield]['tmp_name'], "/path/to/copy/to/" . $FILES['nameoffield]['name']);
or something like that