Description:
------------
Using array_multisort() in a function with copy of local array, this affects the original array.

It's same to bug #32031

I solve this changing the code:
$arrSort = $arr;

to:
$arrSort = $arr + array();

Reproduce code:
---------------
function bug_array($arr) {
  $arrSort = $arr;
  array_multisort($arrSort);
}

$arr = array(1, 0);
print_r($arr);

bug_array($arr);
print_r($arr);

Expected result:
----------------
Array
(
    [0] => 1
    [1] => 0
)
Array
(
    [0] => 1
    [1] => 0
)


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