Psecio\Jwt\Jwt::encrypt PHP Method

    public function encrypt($algorithm, $iv, $key)
    {
        if (!function_exists('openssl_encrypt')) {
            throw new \RuntimeException('Cannot encrypt data, OpenSSL not enabled');
        }
        $data = json_encode($this->getClaims()->toArray(), JSON_UNESCAPED_SLASHES);
        $claims = $this->base64Encode(openssl_encrypt($data, $algorithm, $key, false, $iv));
        return $this->encode($claims);
    }