Description:
------------
If I initialize array immediately when declaring it as a class member (see "Reproduce code") and there are some constants among array keys, then the order of array elements is broken. All the elements which have a constant as a key - they are moved to the end of an array. Thus the declared order of elements is broken.

If I move initialization of array to some method (e.g. in class constructor) - everything works as expected, array is not reordered.

Well, the bug is close to Bug #28072, but there was a talk about static arrays. In my case the array was not static.

Reproduce code:
---------------
define ('baa', '_a_');
define ('baz', '_b_');
class T {
        var $test = array(
                baa     => 'xx',
                'bbb'   => 'x1',
                'aaa'   => 'x0',
                'ccc'   => 'x2',
                baz     => 'yy'
        );
        function process() {
                foreach ($this->test as $x => $y) {
                        echo "$x => $y\n";
                }
        }
}
$t = new T(); 
$t->process();


Expected result:
----------------
_a_ => xx
bbb => x1
aaa => x0
ccc => x2
_b_ => yy

Actual result:
--------------
bbb => x1
aaa => x0
ccc => x2
_a_ => xx
_b_ => yy