3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo mb_detect_encoding('abc', 'UTF8, ASCII');
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
UTF-8
preferences:
50.06 ms | 406 KiB | 5 Q