- mb_convert_case: documentation ( source)
- mb_strtoupper: documentation ( source)
- mb_internal_encoding: documentation ( source)
<?php
mb_internal_encoding('UTF-8');
$content = 'MariƱe';
echo mb_strtoupper($content, "UTF-8");
echo mb_convert_case($content, MB_CASE_UPPER, "UTF-8");