--TEST-- SPL: ArrayIterator with NULL key --FILE-- <?php $ar = new ArrayIterator(array(NULL=>NULL)); @var_dump($ar); var_dump($ar->getArrayCopy()); ?> ===DONE=== <?php exit(0); ?> --EXPECTF-- object(ArrayIterator)#%d (1) { ["storage":"ArrayIterator":private]=> array(1) { [""]=> NULL } } array(1) { [""]=> NULL } ===DONE===