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<?php $array = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19]; $array = array_map(function(array $chunk): float { return array_sum($chunk) / count($chunk); }, array_chunk($array, 5)); var_dump($array);
Output for git.master, git.master_jit, rfc.property-hooks
array(4) { [0]=> float(2) [1]=> float(7) [2]=> float(12) [3]=> float(17) }

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