Description:
------------
Array items are not as defined when using the same key twice.

I have not yet tested this outside of a class.







Reproduce code:
---------------
<?php

Foo::Bar();

abstract class Foo {

        const A = 1;
        const B = 2;
        const C = 3;
        const D = 1;
     
        protected static $sample = array(
                self::A => 'Apple',
                self::B => 'Boy',
                self::C => 'Cat',
                self::D => 'Dog'
                );
       
    public static function Bar() {
        print_R( self::$sample );
    }
}       
?>

Expected result:
----------------
In PHP 5.2.x:

Array
(
    [2] => Boy
    [3] => Cat
    [1] => Dog
)

This is what I would expect to be valid, as the 2nd entry would override the first, making "Dog" the correct value for index 1.

Actual result:
--------------
In PHP 5.3.x:

Array
(
    [1] => Apple
    [2] => Boy
    [3] => Cat
)

This was not expected, as the 1st entry maintained it's value.