3v4l.org

run code in 500+ PHP versions simultaneously
<?php var_dump(preg_match('~[Aa]{2}~', 'aa'));
Output for 7.4.0 - 7.4.5, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
int(1)
Output for 7.4.6 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34
int(0)
preferences:
28.78 ms | 1143 KiB | 11 Q