On a server where :
- The forum is located at : /home/web/forum/www/
- The open_basedir is defined to : /home/web/forum/
The $phpbb_filesystem->resolve_path() function will try to resolve symlinks on each part of the path, like this:
In this case, the first two parts are outside of the open_basedir, and will trigger the following warnings:
Even if this issue can be mitigated when you are on your own server (by changing or disabling the open_basedir restriction, considering that unix permissions are sufficient), this should be fixed on phpBB, because the open_basedir is used as an additional security measure by a lot of hosting providers using shared servers.