Encryption with PHPSecLib

Code
<?php

// encryption with phpseclib - PHP Secure Communications Library

use phpseclib3\Crypt\Blowfish;

$blowfish = new Blowfish('ecb');

$blowfish->setKey('48495774373859848594959');

$plaintext 'My plaintext string';

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

dump($encrypted$decrypted);
Result
^ b"È”X"˜[ßà™Û\x06!\x05ç\eÇxsgHÆ\x07\x7Fa"

^ "My plaintext string"
Used Versions
PHP 8.0, Laminas MVC 3.2, Symfony 5.2, Laravel 8.28, PHPUnit 9.5, Doctrine ORM 2.8