如何在PHP中安全地存储包含敏感数据的cookie？

// 加密cookie数据
function encryptCookieData($data) {
    $key = 'your_encryption_key';
    $iv = 'your_initialization_vector';
    $encryptedData = openssl_encrypt($data, 'AES-256-CBC', $key, 0, $iv);
    return $encryptedData;
}

// 解密cookie数据
function decryptCookieData($encryptedData) {
    $key = 'your_encryption_key';
    $iv = 'your_initialization_vector';
    $decryptedData = openssl_decrypt($encryptedData, 'AES-256-CBC', $key, 0, $iv);
    return $decryptedData;
}

// 设置cookie
function setCookieData($name, $value, $expire = 0, $path = '/', $domain = '', $secure = true, $httponly = true, $samesite = 'Lax') {
    $encryptedValue = encryptCookieData($value);
    setcookie($name, $encryptedValue, $expire, $path, $domain, $secure, $httponly, $samesite);
}

// 获取cookie
function getCookieData($name, $defaultValue = '') {
    if (isset($_COOKIE[$name])) {
        $encryptedValue = $_COOKIE[$name];
        $value = decryptCookieData($encryptedValue);
        return $value;
    }
    return $defaultValue;
}