Note: This could also fit in superuser.
I am setting up PHP 5.3.10 on a shared host with apache2 mpm itk and open_basedir in a way, that each user may not see o
According to this - 4 year old - bug, sys_get_temp_dir() won't work with virtual-hosts; so
/tmp (or whatever your OS uses) in your open_basedir, as it can hold multiple directories (like include_path - separate it with ; on Windows, : otherwise)