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Hi internals,
Voting on https://wiki.php.net/rfc/is_list has started. The vote closes on 2020-01-20.
After discussion, the function name and signature was changed to array_is_list(array $array): bool
to avoid confusion with the possibility of earlier name choices conflicting with hypothetical future list-like types,
and to make it obvious that using it on an ArrayObject/SplDoublyLinkedList is probably a mistake
(throw an ordinary parameter TypeError for non-arrays).
Thanks,
-Tyson