parseParams example

    protected $blockSize = 16;

    /** * {@inheritDoc} */
    public function encrypt($data, $params = null)
    {
        $this->parseParams($params);

        if (empty($this->key)) {
            throw EncryptionException::forNeedsStarterKey();
        }

        // create a nonce for this operation         $nonce = random_bytes(SODIUM_CRYPTO_SECRETBOX_NONCEBYTES); // 24 bytes
        // add padding before we encrypt the data         if ($this->blockSize <= 0) {
            throw EncryptionException::forEncryptionFailed();
        }