next(), end(), prev(), reset() etc. don't return references

meaning this example code won't work as it's thought to do:

<?PHP
$array1 = array('element1','element2');
$array2 = array(&$array1);

next(current($array2)); // here the internal pointer is changed in the copy of array1 that is returned and is in not referenced to to the real $array1 as it should
current(current($array2)); // should return "element2"
?>