Errore di battitura, prova di nuovo

codice:
$dirArray = array();
if ($handle = opendir('cartella')) {
        while (false !== ($file = readdir($handle))) {
            if (($file != "." && $file != "..")) {
                if(!is_dir($file)) {
                   array_push($dirArray,basename($file));
                }
            }
            closedir($handle);
        }
}
$dirArray = sort($dirArray);

echo "<select name=\"nomecartella\">";
foreach($dirArray as $key=>$value) {
   echo "<option>$value</option>";
}
echo "</select>";