<?php // lint >= 7.4

$a = function (?bool $a, ?string &$b, ?int ...$c)
{

};

function b(
	?bool $a,
	array $b,
	$c
) {

}

fn (?bool $a, ?string &$b, ?int ...$c) => $a;

array_map(
    static fn (array $value): array => array_filter($value),
    []
);
