3v4l.org

run code in 300+ PHP versions simultaneously
<?php $re = '(^[A-Za-z0-9_.-]{1,100}$)i'; var_dump(preg_match($re, ''));
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
int(0)
preferences:
164.41 ms | 404 KiB | 174 Q