random_int() availability

• On Linux, the » getrandom(2) syscall will be used if available.
• On other platforms, /dev/urandom will be used.
• If none of the aforementioned sources are available, then an Exception will be thrown.

From: https://secure.php.net/manual/en/function.random-int.php

I'm not sure if things like syscalls and access to /dev/urandom are available on shared hosted servers.
Maybe a fallback should be added?