3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $token = bin2hex(random_bytes(4));
based on QppU7
Output for 7.0.0 - 7.2.0
Output for 5.3.19 - 5.6.28
Fatal error: Call to undefined function random_bytes() in /in/tm0L7 on line 3
Process exited with code 255.