note 621 added to gtk.gtkclist.method.remove.php

If you remove the item with the id "0", the next in the list (the one with the id "1") will become "0".

You cannot make a foreach()-run on the clist selected and remove them this way.

The way to solve this problem is using array_reverse() (so you will run through the list backwards, taking the largest numbers first):

<?
   foreach(array_reverse($myclist -> selection) AS $value){
      $myclist -> remove($value);
   }
?>

 http://gtk.php.net:80/manual/en/gtk.gtkclist.method.remove.php