Re: why manual says 'don't use session_register'?

Giancarlo Pinerolo wrote: > The manual has many cautions that say 'do not use session_regiister,, > session_is_registered, session_unregister, when the ini setting is > register_globals=off. > > But they still do work, it seems. > Or how exactly do these function work differently than with > reg_globals On? > Can I still continue to use them with reg_globals=off, as they seem to > work anyway? If you have register_globals set to off, the $_SESSION array is defined. The functions session_is_registered, session_unregister and session_register use the session file, not the $_SESSION array. That means that the function session_unregister or session_register affects the session file, but not the $_SESSION array! That can lead to unwanted results if you check that value later on (in the same php file). If you use unset($_SESSION['key']) instead of session_unregister('key'), the value will be removed from the $_SESSION array AND from the session file. I recommend following the manual and don't use the session_unregister, session_is_registered and session_register functions anymore. HTH Erwin