Re: How to create, name and start PHP sessions

Make sure you aren't sending any HTML to the browser for any reason before the session_start(); call. Surefire way to prevent this error: place the following line as the first line of PHP script you execute on every page: ob_start(); Check out http://www.php.net/ob_start for details on what that does. -- Uchendu Nwachukwu newsreply AT unndunn DOT com - www.unndunn.com "Phil Powell" <soazine@erols.com> wrote in message news:20020418151537.32475.qmail@pb1.pair.com... > I am now getting the following errors on every page: > > Warning: Cannot send session cache limiter - headers already sent (output > started at c:\program files\apache > group\apache\htdocs\webmissions\picupload\miss_pic_upload.php:25) in > c:\program files\apache > group\apache\htdocs\webmissions\picupload\miss_pic_upload.php on line 81 > > This is when I use the following block of code to first SET the session for > the very first time: > > if (mysql_num_rows($results) == 0) { > // Could not find info in db redirect to login library with error msg > $errorHTML .= "<font color=cc0000>We could not find your information "; > $errorHTML .= " in our database. Please try again.</font><p>"; > $hasLoggedIn = 0; > } else if (strcmp(session_name(), "hasLoggedIn") != 0) { > // Set up session variable with username and redirect to pic upload lib > session_name("hasLoggedIn"); > $name = session_name(); > session_start(); > $HTTP_SESSION_VARS["username"] = $username; > $HTTP_SESSION_VARS["ip"] = $REMOTE_ADDR; // To prevent session stealing > } > > I am completely confused! > > Phil > > "Michael Virnstein" <michael.virnstein@brodos.de> wrote in message > news:20020418145103.2711.qmail@pb1.pair.com... > > you have to put this on top of every of your pages: > > --------------------------------- > > session_name("hasLoggedIn"); > > $stuff = session_name(); > > session_start(); > > --------------------------------- > > session_name first sets the name. then you call session_start which will > > look for the > > sessionid in ${session_name()}. that is why you have to call > session_name() > > BEFORE calling > > session_start(); > > > > Regards Michael > > > > > > "Phil Powell" <soazine@erols.com> schrieb im Newsbeitrag > > news:20020418141725.75200.qmail@pb1.pair.com... > > > Thanx, however, I cannot retain the session_name when I go to the next > > URL. > > > How do I retain the session_name especially when I have to use a form > > > method=POST? > > > > > > I have a URL that will be the login > > > > > > Once you login you will have a session (that works now) > > > > > > That page with the session will have a form with five <input=file> type > > form > > > elements > > > > > > Once submitted you will be at a "thank-you" page and files uploaded, but > > > then the session is gone (session_name is back to PHPSESSID again) > > > > > > What do I do to keep it? I cannot use cookies and putting it in the URL? > > > > > > Phil > > > "Michael Virnstein" <michael.virnstein@brodos.de> wrote in message > > > news:20020418104826.84326.qmail@pb1.pair.com... > > > > session_name will retur the previos name of the session, so in your > case > > > > $stuff will contain "PHPSESSID" > > > > and i think you have to call session_start(); before you do > > > > $HTTP_SESSION_VARS["username"] = $username; > > > > > > > > so perhaps this will work: > > > > > > > > session_name("hasLoggedIn"); > > > > $stuff = session_name(); > > > > session_start(); > > > > $HTTP_SESSION_VARS["username"] = $username; > > > > > > > > Regards, Michael > > > > > > > > "Phil Powell" <soazine@erols.com> schrieb im Newsbeitrag > > > > news:20020418094249.30058.qmail@pb1.pair.com... > > > > > Will the following lines set up a session by the name of > "hasLoggedIn" > > > > with > > > > > HTTP_SESSION_VARS["username"]? > > > > > > > > > > $stuff = session_name("hasLoggedIn"); > > > > > $HTTP_SESSION_VARS["username"] = $username; > > > > > session_start(); > > > > > > > > > > I am trying to create a page that sets a session variable upon > > > successful > > > > > login, problem is, the session_name() never changes it always > remains > > > the > > > > > default PHPSESSID what am I doing wrong now? > > > > > > > > > > I fixed the problem with multiple files, that was bizarre! > > > > > > > > > > Thanx > > > > > Phil > > > > > > > > > > > > > > > > > > > > > > > > > > > > > "Uchendu Nwachukwu" <newsreply@unndunn.com> wrote in message > news:20020418145747.8962.qmail@pb1.pair.com... > > In your example, simply place this line in your code (on *every* page you > > want the session to be on): > > > > session_name("HasLoggedIn"); > > session_register("username"); > > > > If your PHP was compiled with '--enable-trans-sid' you shouldn't have to > > worry about anything else. PHP will automatically store the session ID in > a > > cookie, or it will pass the session ID in your HTML links. If it wasn't > > compiled with '--enable-trans-sid', you'll need to use the constant SID. > > > > Example: > > ------------------------------------------------------------------ > > <?php > > session_name("HasLoggedIn"); > > session_register("username"); ?> > > > > Welcome <?=$username;?>. <!-- assumes user has already entered a username > on > > some other page --> > > > > <a href="nextpage.php?<?=SID;?>">Click here to continue.</a> > > ------------------------------------------------------------------ > > > > Hope that helps! Check out > > http://www.php.net/manual/en/ref.session.php > for > > more info > > > > -- > > Uchendu Nwachukwu > > newsreply AT unndunn DOT com - www.unndunn.com > > > > "Phil Powell" <soazine@erols.com> wrote in message > > news:20020418141725.75200.qmail@pb1.pair.com... > > > Thanx, however, I cannot retain the session_name when I go to the next > > URL. > > > How do I retain the session_name especially when I have to use a form > > > method=POST? > > > > > > I have a URL that will be the login > > > > > > Once you login you will have a session (that works now) > > > > > > That page with the session will have a form with five <input=file> type > > form > > > elements > > > > > > Once submitted you will be at a "thank-you" page and files uploaded, but > > > then the session is gone (session_name is back to PHPSESSID again) > > > > > > What do I do to keep it? I cannot use cookies and putting it in the URL? > > > > > > Phil > > > "Michael Virnstein" <michael.virnstein@brodos.de> wrote in message > > > news:20020418104826.84326.qmail@pb1.pair.com... > > > > session_name will retur the previos name of the session, so in your > case > > > > $stuff will contain "PHPSESSID" > > > > and i think you have to call session_start(); before you do > > > > $HTTP_SESSION_VARS["username"] = $username; > > > > > > > > so perhaps this will work: > > > > > > > > session_name("hasLoggedIn"); > > > > $stuff = session_name(); > > > > session_start(); > > > > $HTTP_SESSION_VARS["username"] = $username; > > > > > > > > Regards, Michael > > > > > > > > "Phil Powell" <soazine@erols.com> schrieb im Newsbeitrag > > > > news:20020418094249.30058.qmail@pb1.pair.com... > > > > > Will the following lines set up a session by the name of > "hasLoggedIn" > > > > with > > > > > HTTP_SESSION_VARS["username"]? > > > > > > > > > > $stuff = session_name("hasLoggedIn"); > > > > > $HTTP_SESSION_VARS["username"] = $username; > > > > > session_start(); > > > > > > > > > > I am trying to create a page that sets a session variable upon > > > successful > > > > > login, problem is, the session_name() never changes it always > remains > > > the > > > > > default PHPSESSID what am I doing wrong now? > > > > > > > > > > I fixed the problem with multiple files, that was bizarre! > > > > > > > > > > Thanx > > > > > Phil > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >