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@ 2019-02-13T13:00:41Z

<?php
$char = "ჯ";
$uppercaseChar = mb_strtoupper($char);
echo $uppercaseChar . "\n";
echo $uppercaseChar === $char ? 'same' : 'different';

Output
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mb_strtoupper: documentation ( source)

preferences:dark modelive preview

24.82 ms | 402 KiB | 5 Q