The following code snippet generates a nasty warning when $mylist is empty.

  while (list($key, $val) = each($mylist)) { 
    // do warning
  }

The workaround in PHP is trivial, but ugly.

  while (count($mylist) and list($key, $val) = each($mylist)) { 
    // do warning
  }

Would be nicer if the each() iterator just returned nothing, causing the while loop to terminate, when the list is empty.