Description:
------------
If you have user defined function and this function uses global array (using global $ARRAY;), you cannot use functions next()/prev(), because they do not change internal array pointer.

Reproduce code:
---------------
$msort=array();

function do_print_test() {
        global $msort;
        reset($msort);echo sprintf("0:%s=%s\n",key($msort),current($msort));
        next($msort);echo sprintf("1:%s=%s\n",key($msort),current($msort));
        next($msort);echo sprintf("2:%s=%s\n",key($msort),current($msort));
        next($msort);echo sprintf("3:%s=%s\n",key($msort),current($msort));
        next($msort);echo sprintf("4:%s=%s\n",key($msort),current($msort));
}

array_push($msort,"a");
array_push($msort,"b");
array_push($msort,"c");
array_push($msort,"d");
array_push($msort,"e");
array_push($msort,"f");

do_print_test();


Expected result:
----------------
in PHP 4.3.9 and 4.4.0

0:0=a
1:1=b
2:2=c
3:3=d
4:4=e


Actual result:
--------------
in PHP 4.4.1

0:0=a
1:0=a
2:0=a
3:0=a
4:0=a