3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(strlen(random_bytes(9/2)));
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.6
int(4)
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Fatal error: Call to undefined function random_bytes() in /in/vJOrq on line 2
Process exited with code 255.
preferences:
70.29 ms | 402 KiB | 48 Q