3v4l.org

run code in 500+ PHP versions simultaneously
<?php var_dump(setlocale(LC_ALL, "C\0invalid"));
Output for 8.2.31 - 8.2.32, 8.3.0 - 8.3.33, 8.4.1 - 8.4.24, 8.5.0 - 8.5.9
string(1) "C"
preferences:
47.6 ms | 765 KiB | 4 Q