3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump( mb_detect_encoding("\xDC", ['UTF-8'], true), mb_detect_encoding("Ü", ['UTF-8'], true) );
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.6 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
bool(false) string(5) "UTF-8"
preferences:
93.65 ms | 1553 KiB | 4 Q