3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(strpos(trim('Mr Concern'), 'Concern') !== false);
Output for 7.3.24 - 7.3.33, 7.4.12 - 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
bool(true)
preferences:
107.99 ms | 403 KiB | 119 Q