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<?php $array1 = [1, 2, 2, 3]; $array2 = [10, 20, 30, 50]; $array_sum1 = []; foreach ($array1 as $key => $value) { $array_sum1[$value][] = $array2[$key]; } $array_sum1 = array_map("array_sum", $array_sum1); print_r($array_sum1); $array3 = [4, 4, 4, 6]; $array4 = [10, 20, 30, 50]; $array_sum2 = []; foreach ($array3 as $key => $value) { $array_sum2[$value][] = $array4[$key]; } $array_sum2 = array_map("array_sum", $array_sum2); print_r($array_sum2);die;