Sums the values of two associative arrays with the same keys. 同じキーを持つ 2 つの連想配列の値を合計します。

.php

<?php
/**
 * Sums the values of two associative arrays with the same keys.
 *
 * This function takes two associative arrays with identical keys and
 * returns a new array where each value is the sum of the corresponding
 * values from the input arrays.
 *
 * @param  array $array1 The first associative array.
 * @param  array $array2 The second associative array.
 *
 * @return array The resulting associative array with summed values.
 */
 function array_sum_values($array1, $array2) {
    return array_reduce(
        array_keys($array1),
        function ($carry, $key) use ($array1, $array2) {
            $carry[$key] = $array1[$key] + $array2[$key];
            return $carry;
        },
        []
    );
}