Description:
------------
When making nested calls to array_walk, it does not behave as it should. Supposedly this has been fixed, but it doesn't appear so.  Please refer to the now-closed bug report #33286.  To see it working on my server running 5.0.4, go to:

http://web.ics.purdue.edu/~varsity/array_walk.php


Reproduce code:
---------------
<?php
function test_subfunc(&$item1, $key, &$prefix)
{
   echo "&nbsp;&nbsp;test_subfunc<br/>";
}

function test_func($item2, $key)
{
   echo "test_func<br/>";

   $arr = array(1, 2, 3, 4);
   array_walk($arr, 'test_subfunc', 'extra_arg');
}

$x = array(5,6,7);
array_walk($x, 'test_func');
?>

Expected result:
----------------
test_func
  test_subfunc
  test_subfunc
  test_subfunc
  test_subfunc
test_func
  test_subfunc
  test_subfunc
  test_subfunc
  test_subfunc
test_func
  test_subfunc
  test_subfunc
  test_subfunc
  test_subfunc

Actual result:
--------------
test_func
  test_subfunc
  test_subfunc
  test_subfunc
  test_subfunc

Warning: Missing argument 3 for test_subfunc() in array_walk.php on line 2
  test_subfunc

Warning: Missing argument 3 for test_subfunc() in array_walk.php on line 2
  test_subfunc