<?php $array = [ 1 => [ 'A' => ['AA' => 3, 'AB' => 5], 'B' => ['BA' => 2] ], 2 => [ 'C' => ['CA' => 4], 'D' => ['DA' => 1, 'DB' => 2] ], 3 => [ 'E' => ['EA' => 1, 'EB' => 2, 'EC' => 3], 'F' => ['FA' => 0, 'FB' => 7, 'FC' => 7] ] ]; var_export( array_map( fn($set) => array_sum(array_merge(...array_values($set))), $array ) );
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