3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump( LOCK_UN & LOCK_NB, LOCK_UN, LOCK_UN | LOCK_NB );
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
int(0) int(3) int(7)
preferences:
76.11 ms | 406 KiB | 5 Q