I use function DIR in version 4.0 is ok. And now 
i converting to new version 4.0.2 not happy it have error
Exam code

...$d = dir("$shop_linkpage");
...while ($file = $d->read()) { // error
...       echo $file
...}
...$d->close(); // error

Method of class $d (read,close) not work. why

Help me please ...
Thank you