3v4l.org

run code in 300+ PHP versions simultaneously
<?php $locale = 'cs_CZ.ISO8859-2'; setlocale( LC_CTYPE, $locale); $char = 'ž'; echo "Testing strtoupper('{$char}') on different PHP versions:\n"; echo "Expected result: Ž\n"; echo 'Actual result: ' . strtoupper($char) . "\n";
Output for 8.2.0 - 8.2.24, 8.3.0 - 8.3.12
Testing strtoupper('ž') on different PHP versions: Expected result: Ž Actual result: ž
Output for 4.3.0, 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.29
Testing strtoupper('ž') on different PHP versions: Expected result: Ž Actual result: Ů
preferences:
42.57 ms | 407 KiB | 5 Q