Re: Learning PHP Sessions

Maybe if you showed us a [small] snippet of the offending code and a procedure of the order of events, we may be able to help out further. Regards: Russ On Mon, 5 Nov 2001 01:00:23 -0500 Matthew Tedder <matthew@simpflex.com> wrote: > > Context: I am using PHP4 from the packages included with Linux Mandrake 8.1 > > When I register and populate the variable--the variable is shows up empty in > all the rest of my script. It doesn't seem to matter if it's assigned before > or after the registration. > > Furthermore, neither my book nor the on-line PHP documentation definitively > explains what session_start() does or session_register() does. > > My impression is that session_start() initiates a session if the $PHPSESSID > is not already read in from the calling page (cooky or CGI variable). If > $PHPSESSID already exists (from cooky or CGI variable) then it loads any > associated variables from the previous page....and maintains the same session > ID as was automatically assigned from the first session_start() without one. > > Then session_register() simply marks what variables are to be stored and > associated with the current session ID. At the end of the script, it stores > their values for retrieval during the next execution of session_start() where > the identical session ID is given (via cooky or CGI variables). > > But, although I get no errors, my scripts are not holding the values of any > registered variables even on the same page.... It simply doens't appear to > have any effect, regardless of what I do. > > --Matthew > > > On Wednesday 31 October 2001 11:44 am, you wrote: > > * session_register('myvar'); creates a session var called $myvar > > * session_start(); needs to be called from the top of each script that will > > need the session var $myvar > > * session_destroy('myvar'); rids you of $myvar completely. > > * session_destroy('HTTP_SESSION_VARS'); rids you off *all* currently > > registered session vars > > > > Note that a variable used in this way is refered to as 'myvar' and > > referenced a snormal within the script as: $myvar > > > > HTH you out. > > Russ > > > > On Wed, 31 Oct 2001 09:55:33 -0600 Steve Cayford > <steve_cayford@unioncab.com> wrote: > > > This is really off-topic for this list, but... > > > > > > From my understanding of sessions, you really don't want session_start() > > > in an if{} block. Every time you hit this script, it will have no memory > > > of any session variables until you call session_start(). > > > > > > -Steve > > > > > > On Tuesday, October 30, 2001, at 02:30 PM, Matthew Tedder wrote: > > > > <?php > > > > /* > > > > Hi, > > > > > > > > I'm new to PHP and am having trouble understanding how to use PHP > > > > sessions. My book tells in near the beginning how to start them and > > > > register > > > > session variables, but I can't figure out how to destroy a session or > > > > later > > > > read those session variables. I'm also trying to do this across > > > > frames, but > > > > can't even get it to work within a single page. > > > > > > > > Here's what I've learned so far and what my problems are: > > > > */ > > > > > > > > /* To start a session */ > > > > session_start(); > > > > > > > > /* To register a session variable */ > > > > session_register("myvar"); > > > > $myvar = "some value"; > > > > > > > > /* > > > > PROBLEM #1: From the above commands, I get a $PHPSESSID that seems to > > > > be > > > > globally available for use, but I cannot seem to read my values back > > > > out of > > > > the registered session variable from anywhere... I tried: > > > > */ > > > > > > > > print "$myvar\n"; /* and absolutely nothing is printed */ > > > > > > > > /* To destroy a session */ > > > > session_destroy(); > > > > > > > > /* > > > > PROBLEM #2: This says there is no session to destroy. It's rather > > > > strange > > > > because I can still print the $PHPSESSID value.. > > > > > > > > I've attached my code... > > > > > > > > */ > > > > ?> > > > > -- > > > > PHP Database Mailing List (http://www.php.net/) > > > > To unsubscribe, e-mail: php-db-unsubscribe@lists.php.net > > > > For additional commands, e-mail: php-db-help@lists.php.net > > > > To contact the list administrators, e-mail: > > > > php-list-admin@lists.php.net > > > > > > -- > > > PHP Database Mailing List (http://www.php.net/) > > > To unsubscribe, e-mail: php-db-unsubscribe@lists.php.net > > > For additional commands, e-mail: php-db-help@lists.php.net > > > To contact the list administrators, e-mail: php-list-admin@lists.php.net > > > > #-------------------------------------------------------# > > > > "Believe nothing - consider everything" > > > > Russ Michell > > Anglia Polytechnic University Webteam > > Room 1C 'The Eastings' East Road, Cambridge > > > > e: r.j.michell@apu.ac.uk > > w: www.apu.ac.uk/webteam > > > > www.theruss.com > > > > #-------------------------------------------------------# #-------------------------------------------------------# "Believe nothing - consider everything" Russ Michell Anglia Polytechnic University Webteam Room 1C 'The Eastings' East Road, Cambridge e: r.j.michell@apu.ac.uk w: www.apu.ac.uk/webteam www.theruss.com #-------------------------------------------------------#