Re: Cookies & sessions

2010/1/19 <clancy_1@cybec.com.au>: > I am trying for the first time to use cookies. The manual contains the statement "Cookies > are part of the HTTP header, so setcookie() must be called before any output is sent to > the browser." > > When I first started using sessions, I was alarmed to read a very similar statement about > sessions, but I soon found that if I started my program with the statement > "session_start();" I could then set up, access, modify or clear any session variable > at > any time in my program. This is enormously useful, as I can put the session handling at > any convenient point in my program, and can precede them with diagnostics if I need to. > > However I have almost immediately found that while I appear to be able to read cookies at > any time, I cannot set them when I would like to. Is there any similar trick which will > work with cookies? The only trick is that you have to call setcookie() before any output is sent to the browser, just like the session_start() behavior. > If I really have to work out what they should be, and then set them up, > before issuing any diagnostics, etc, it will make life decidely more complicated. (I > assume that I can set several cookies using successive calls to setcookie()?) Yes, each one with a differente name. > > I was also somewhat surprised to find that a cookie is used to implement sessions. Does > this place any limitations on using both sessions and cookies in the same program? > No. The cookie in PHP that implements session is by default called PHPSESSID. As long as your other cookies are named differently, you should be fine. > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php >