3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(mb_regex_encoding());
Output for 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.13
string(5) "UTF-8"
Output for 5.5.0 - 5.5.35
string(6) "EUC-JP"
preferences:
82.64 ms | 406 KiB | 5 Q