Description:
------------
I would be nice if PHP 6.x can pass no-variables by reference.

For example: strtoupper on GPC arrays using array_walk_recursive.


Reproduce code:
---------------
<?
 array_walk_recursive(array(&$_GET,&$_POST,&$_COOKIE),create_function('&$v','$v=strtoupper($v);'));
?>


Expected result:
----------------
Like now:

<?
 array_walk_recursive($gpc=array(&$_GET,&$_POST,&$_COOKIE),create_function('&$v','$v=strtoupper($v);'));

 unset($gpc);
?>


Actual result:
--------------
Fatal error: Only variables can be passed by reference