3v4l.org

run code in 500+ PHP versions simultaneously
<?php $latin1 = "\xD6wn"; $utf8 = "\xc3\x96wn"; var_dump(mb_check_encoding($latin1, 'UTF-8')); var_dump(mb_check_encoding($utf8, 'UTF-8'));
Output for 7.1.0 - 7.1.25, 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 - 8.1.34, 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) bool(true)
preferences:
124 ms | 1432 KiB | 4 Q