如何在PHP中按变量深入到多维数组中？

function getArrayValue($array, $keys) {
    if (count($keys) === 1) {
        return $array[$keys[0]];
    } else {
        $key = array_shift($keys);
        return getArrayValue($array[$key], $keys);
    }
}

// 示例多维数组
$data = [
    'key1' => [
        'key2' => [
            'key3' => 'value'
        ]
    ]
];

// 按变量深入到多维数组中
$keys = ['key1', 'key2', 'key3'];
$result = getArrayValue($data, $keys);

echo $result;  // 输出：value