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<?php $array = [10,20,30,40,50,60,70]; $final_count = 3; $new_array = array_map(function ($a) { return array_sum($a) / count($a); }, array_chunk($array, (int)(count($array) / $final_count))); print_r($new_array);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => 15 [1] => 35 [2] => 55 [3] => 70 )

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