Encryption with PHPSecLib

Code
<?php

// encryption with phpseclib - PHP Secure Communications Library

use phpseclib\Crypt\Blowfish;

$blowfish = new Blowfish();

$blowfish->setKey('48495774373859848594959');

$plaintext 'My plaintext string';

$encrypted $blowfish->encrypt($plaintext);
$decrypted $blowfish->decrypt($encrypted);

var_dump($encrypted$decrypted);
Result
string(24) "ȔX"[E9@I#Wp"
string(19) "My plaintext string"
Used Versions
PHP 7.2, Zend 3.0, Symfony 4.0, Laravel 5.6, PHPUnit 6.5, Doctrine 2.8