<?php

    $get_title = $_POST['title'];

    $do_search  = array('ä', 'Ä', 'ö', 'Ö', 'ü', 'Ü', 'ß', ' ');
    $do_replace = array('ae', 'Ae', 'oe', 'Oe', 'ue', 'Ue', 'ss', '_');

    $clean_title = str_replace($do_search, $do_replace, $get_title);
    $uploadfile  =  $uploaddir . strtolower(mysql_real_escape_string($clean_title)) . $ext;

?>