On Mon, May 20, 2013 at 5:33 AM, 孟远涛 <yuantao.meng@xxxxxxxxx> wrote: > I find the Note in PHP document. > http://www.php.net/manual/en/function.session-id.php > > "Note: When using session cookies, specifying an id for session_id() will > always send a new cookie when session_start() is called, regardless if the > current session id is identical to the one being set." > > I feel puzzled about this feature. Even if the current session id is > identical to the one one being set, session_start will send a new cookie. I > want to know why session_start behave in this way. > > Forgive my poor English. Thanks in advance. > You will find the answer in the PHP source code. If you don't want this to happen, check if the current session id matches with the value you want to set it to, and don't set if they match. - Matijn
