Text-Encoding with intl UConverter

Code
<?php

$uconv 
= new UConverter('latin-1''UTF-8');
echo 
$uconv->convert('äüöß');

echo 
PHP_EOL;

echo 
UConverter::transcode('äüöß''latin-1''UTF-8');



Result
äüöß
äüöß
Used Versions
PHP 8.2, Laminas MVC 3.2, Symfony 5.2, Laravel 8.28, PHPUnit 9.5, Doctrine ORM 2.8