//echo getHTMLSelect('dropdown', array(0 => "", 1 => "'test'\"", 2 => "test2"), @$_REQUEST['sel']);

/**
 * Returns an HTML dropdown menu.
 *
 * @param string $name HTML select name
 * @param array $values options key value
 * @param int $selected_id currently selected ID
 * @param string $attr several attributes that will be added in <select ....>
 * @return string
 */
function getHTMLSelect($name = 'dropdown', $values = array(), $selected_id = 0, $attr = '') {
    $buff = "<select name=\"$name\" $attr>\n";
    foreach($values as $k => $v) {
        $s = ($selected_id == $k) ? " selected='selected'" : '';
        $k = intval($k);
        $v = htmlentities($v, ENT_QUOTES, 'UTF-8');
        $buff .= "<option value=\"$k\" $s>$v</option>\n";
    }

    $buff .= "</select>\n";
    return $buff;
}