(PHP 5 >= 5.3.0, PHP 7, PHP 8)
An Iterator that sequentially iterates over all attached iterators
$flags = MultipleIterator::MIT_NEED_ALL | MultipleIterator::MIT_KEYS_NUMERIC)MultipleIterator::MIT_NEED_ANYDo not require all sub iterators to be valid in iteration.
MultipleIterator::MIT_NEED_ALLRequire all sub iterators to be valid in iteration.
MultipleIterator::MIT_KEYS_NUMERICKeys are created from the sub iterators position.
MultipleIterator::MIT_KEYS_ASSOCKeys are created from sub iterators associated information.