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<?php $locale = 'cs_CZ.ISO8859-2'; setlocale( LC_CTYPE, $locale); $char = 'ž'; echo "Testing strtoupper('{$char}'):\n"; echo "Expected result: Ž\n"; echo 'Actual result: ' . strtoupper($char) . "\n";
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Testing strtoupper('ž'): Expected result: Ž Actual result: ž
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.28
Testing strtoupper('ž'): Expected result: Ž Actual result: Ů
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