3v4l.org

run code in 300+ PHP versions simultaneously
<?php $eng = 'controversial'; $ru = 'спорный'; var_dump( strlen($eng), strlen($ru) );
Output for 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
int(13) int(14)
preferences:
107.89 ms | 1456 KiB | 4 Q