Warning by is_readable() in class-phpass.php

[ocean90]

After install I get this message

Warning: is_readable() [function.is-readable]: open_basedir restriction in effect. File(/dev/urandom) is not within the allowed path(s): (/var/www/web31/html/:/var/www/web31/phptmp/:/var/www/web31/files/:/var/www/web31/atd/) in /var/www/web31/html/blog/wp-includes/class-phpass.php on line 58

If I want to change then the password I get the typical
Warning: Cannot modify header information message.

Maybe we should add an @ before is_readable('/dev/urandom')

See #12331 (which is likely a duplicate of this ticket)

(In [13429]) Suppress potential is_readable() warning. Fixes #12148 props ocean90

Related: #15088