PHP替换未知深度的多维数组中的元素

function replaceArrayValue(&$array, $searchValue, $replaceValue) {
    foreach ($array as &$value) {
        if (is_array($value)) {
            replaceArrayValue($value, $searchValue, $replaceValue);
        } else {
            if ($value === $searchValue) {
                $value = $replaceValue;
            }
        }
    }
}

// 示例用法
$array = [
    'a' => [
        'b' => [
            'c' => 'old value',
        ],
    ],
    'd' => 'old value',
];

$searchValue = 'old value';
$replaceValue = 'new value';

replaceArrayValue($array, $searchValue, $replaceValue);

print_r($array);