open_basedir INI setting is enabled
open_basedir configuration adds a thin layer of security to PHP,
especially when different applications are running on the same server. However
open_basedir can decrease the performance of an application, because
it disables the realpath cache and generally makes PHP I/O functions slower.
There are security options on the Linux operating system level that are much more suitable than open_basedir such as chroot, dedicated servers, virtualization or containerization.