(PHP 4, PHP 5, PHP 7)
session_save_path — Get and/or set the current session save path
session_save_path() returns the path of the current directory used to save session data.
Session data path. If specified, the path to which data is saved will be changed. session_save_path() needs to be called before session_start() for that purpose.
On some operating systems, you may want to specify a path on a filesystem that handles lots of small files efficiently. For example, on Linux, reiserfs may provide better performance than ext2fs.
Returns the path of the current directory used for data storage.