Intl transliterator conversions of strings

Code
<?php

$trans 
Transliterator::create('Any-Upper');
echo 
$trans->transliterate('äčģfş') . PHP_EOL;

$trans Transliterator::create('Any-Hex');
echo 
$trans->transliterate('A');
Result
ÄČĢFŞ
\u0041
Used Versions
PHP 7.3, Zend 3.0, Symfony 4.3, Laravel 5.8, PHPUnit 8.0, Doctrine 2.10