Ouzo\Csrf\CsrfProtector::generateCsrfToken PHP Method

    private static function generateCsrfToken()
    {
        $length = 32;
        $bytes = openssl_random_pseudo_bytes(($length + 1) / 2);
        $hex = bin2hex($bytes);
        return substr(base64_encode($hex), 0, $length);
    }