> > This is simply not true, 0 is not always the first key in a list,
> > especially after filtering it. Hence there is a need for this function
> > in the first place.
>
> Just to clarify this point: If 0 is not the first key, then it's not a list.
> After filtering a list, you get an array that may or may not be a list:
> https://3v4l.org/VegUr
I don't see how `array_is_list` is relevant to `array_first` and
`array_last`. PHP arrays are ordered:
$foo = [
"first" => 1,
"third" => 3,
];
It would be perfectly fine to use `array_first` or `array_last` with
`$foo`. I think probably you would use `array_key_first` and
`array_key_last` so you also get the key and not just the value, but I
don't see any need to reduce `array_first` and `array_last` to only be
logical or correct with arrays that uphold `array_is_list`.
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