Description:
------------
I have to reopen this bug http://bugs.php.net/bug.php?id=42655 because it was incorrectly closed and tony2001 doesn't seem to receive email.

Here Copy/paste email i send him.

This is not the same bug.

In #34982, an array is modified outside the function func() that call array_walk_recursive. This bug doesn't exist anymore in 5.2.4

The bug i report is when calling array_walk_recursive on an array (callback function doesn't even have reference & for array input and does nothing).
Original array shouldn't be modified, but if you var_dump it, you can see reference on subarray

[0]=> &array(1)

instead of

[0]=>  array(1)

The array shouldn't have been modified but array_walk_recursive leaves references.
This can cause trouble, eg you cant duplicate the original array anymore. Look at following example

$data = array ('key1' => 'val1', array('key2' => 'val2'));

function foo($item, $key) {}; // dumb callback function
var_dump($data);
array_walk_recursive($data, 'foo');
$data2 = $data;      // Duplicate array
$data2[0] = 'altered'; // Alter copy
var_dump($data);
var_dump($data2);

array(2) {
  ["key1"]=> string(4) "val1"
  [0]=> &string(5) "bingo"
}
array(2) {
  ["key1"]=> string(4) "val1"
  [0]=> &string(5) "bingo"
}

both $data and $data2 are altered;


Reproduce code:
---------------
$data = array ('key1' => 'val1', array('key2' => 'val2'));

function dumb($i, $k){}

var_dump($data);
array_walk_recursive($data,'foo');

// Double check the [0]=>&array(1) in actual  result
var_dump($data);

Expected result:
----------------
Expected result:
----------------
array(2) {
  ["key1"]=> string(4) "val1"
  [0]=> array(1) {
    ["key2"]=> string(4) "val2"
  }
}
array(2) {
  ["key1"]=> string(4) "val1"
  [0]=> array(1) {
    ["key2"]=> string(4) "val2"
  }
}

Actual result:
--------------
Actual result:
--------------
array(2) {
  ["key1"]=> string(4) "val1"
  [0]=> array(1) {
    ["key2"]=> string(4) "val2"
  }
}
array(2) {
  ["key1"]=> string(4) "val1"
  [0]=> &array(1) {
    ["key2"]=> string(4) "val2"
  }
}