By using PHP4 , has been build in the
session function which allow us to register
a variable to session scope.
I read some article regarding
session_set_save_handler() which allow us
to customize, store in any device we want
-file based or database.
I wondered since PHP4 already got the build
in support ,why we still need
session_set_save_handler() , is it
the build in session not secure or
not powerful
enough ?