Description:
------------
The SPL iterator_to_array() function does not appear to include every 
inner iterator contained within an AppendIterator. It seems that it only 
processes the very last iterator that was appended.

I'd expect that array conversion would parallel the traversal of 
foreach, but it does not. To maintain consistency within SPL itself, I'd 
suggest that this be corrected.

If the behavior can be confirmed, I'm willing to supply the patch & 
regression tests. I'd like more karma.

I've also verified this w/ version 5.2.6 on the same platform and 
version 5.2.3-1ubuntu6 on x86 32-bit Linux.

Reproduce code:
---------------
<?php
$r = new AppendIterator();
$r->append(new ArrayIterator(array(1,2)));
$r->append(new ArrayIterator(array(3,4)));
$r->append(new ArrayIterator(array(5,6)));

// only sees 5 and 6:
print_r(iterator_to_array($r));

// this works as expected: foreach ($r as $i) echo $i;
?>



Expected result:
----------------
Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
    [5] => 6
)






Actual result:
--------------
Array
(
    [0] => 5
    [1] => 6
)