3v4l.org

run code in 300+ PHP versions simultaneously
<?php putenv('SYSTEMROOT='); echo strlen(random_bytes(1));
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.13, 7.3.0 - 7.3.1
1
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Fatal error: Call to undefined function random_bytes() in /in/O9SZN on line 6
Process exited with code 255.
preferences:
119.6 ms | 402 KiB | 107 Q