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<?php $array = [ 2 => 5, 4 => 1, 8 => 3, 0 => 17, 9 => 2, 11 => 67 ]; $ranges = ['1-5', '6-10', '1000-5000']; var_export( array_reduce( $ranges, fn($result, $range) => $result + [$range => array_sum(array_intersect_key($array, array_flip(range(...sscanf($range, '%d-%d')))))], [] ) );
Output for git.master, git.master_jit
array ( '1-5' => 6, '6-10' => 5, '1000-5000' => 0, )

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