Variables in between files

[ReVeR]

Hello.
I have the first file:
index.php
in this file i can have a user set a isloggedin variable type, and it workes.
But when i go onto anohter page via link, the variable is no longer existant.
How can i have a variable that exists in one form while the user is connected?
Thx

[ari_aaron]

You will have to use session variables, although I don't know how to.

[ReVeR]

hmm...how do i get a session variable from one file into another?
can somone post a simple example of how that works?
Thx

[shortj75]

first you have to register the session which is usually done on your log-in page but it can be done on any page

[code]

//first you have to start sessions
session_start();

// second you havr to register some session variables!
session_register('first');
$_SESSION['first'] = $first;
session_register('last');
$_SESSION['last'] = $last;
session_register('email');
$_SESSION['email'] = $email;
session_register('userid');
$_SESSION['userid'] = $userid;

[/code]

next you have to start sessions on every page



[code]

//next your have to paste this at the top of every page ad this is how you keep your session alive from page to page if this is not on the page you will lose the vaiable

session_start();

// if close the browser session is destroyed and it will be restarted the next time you visit the page with the session register on it
[/code]

next you have to call the session variable when you want to use it

[code]
// remember this has to be at the top of the page
session_start();

// this is how you call a session variable
echo "$_SESSION[first]";
echo "$_SESSION[last]";
echo "$_SESSION[email]";
echo "$_SESSION[userid]";

or you can do it like this

$first=$_SESSION['first'];
$last=$_SESSION['last'];
$email=$_SESSION['email'];
$user=$_SESSION['userid'];

echo "$first $last <br>";
echo "$user <br>";
echo "$email <br>";



[/code]

it is fairly easy

[ReVeR]

Hey, man thx alot, that is great explanation:D

[shortj75]

your welcome it is no problem i was a newbie once and needed the help and i got it so i do the same for others

[ReVeR]

hey, i was doing what u told me but i seem to have a problem:
index.php
[code]
session_start();
    session_register('admin');
    session_register('user');
    $_SESSION['admin']=false;
    $_SESSION['user']=false;
    include 'library/config.php';
    include 'news/news.php';
    include 'library/opendb.php';
    include 'login/login.php';
    include 'timer/timer.php';
    include 'counter/counter.php';
    $news=new cnews;
    $login= new clogin;
    $counter= new ccounter;
    $login->isadmin();
    if(isset($_POST['txtUserId'])&&isset($_POST['txtPassword'])){
        $login->check($_POST['txtUserId'],$_POST['txtPassword'],false);
    }
    if(isset($_POST['btnLogout'])){
        $login->check("Default","Default",true);
    }
    if($login->loged==true&&$login->isadmin==true){
        $_SESSION['admin']=true;
    }
    else if($login->loged==true&&$login->isadmin==false){
        $_SESSION['admin']=false;
        $_SESSION['user']=true;
    }
[/code]
this is a login script that logs a user in a checks if he is admin. Now i set the session and all here, but when i href to another file
[code]
<li><a href="news_update.php">News</a></li>
[/code]
like so i seem to lose that:
[code]
<?php
    session_start();
    echo $_SESSION['user'];
    include 'header.php';
    $news->newslong(1,8);
    include 'lower.php';
?>
[/code]
i get that user is undefined.
Any ideas how to fix this?
Thx

[shortj75]

your problem is you are not registering them right
change this

[code]

session_register('admin');
    session_register('user');
    $_SESSION['admin']=false;
    $_SESSION['user']=false;
[/code]

to this
[code]

session_register('admin');
    $_SESSION['admin']=$admin;
session_register('user');
    $_SESSION['user']=$user;

[/code]

and it should work fine

[trq]

You should avoid [i]session_register()[/i], it is no longer needed.

From the manual....
[!--quoteo--][div class=\'quotetop\']QUOTE[/div][div class=\'quotemain\'][!--quotec--]
If you want your script to work regardless of register_globals, you need to instead use the $_SESSION array as $_SESSION entries are automatically registered. If your script uses session_register(), it will not work in environments where the PHP directive register_globals is disabled.
[/quote]

[ReVeR]

i checked my code, and it is fine, it worked on another computer, so it is my php setup.
How can i configure the php ini so it assepcts the sessions? what should i look at ?
here is my session setting in php.ini
[code]
[Session]
; Handler used to store/retrieve data.
session.save_handler = files

; Argument passed to save_handler.  In the case of files, this is the path
; where data files are stored. Note: Windows users have to change this
; variable in order to use PHP's session functions.
;
; As of PHP 4.0.1, you can define the path as:
;
;     session.save_path = "N;/path"
;
; where N is an integer.  Instead of storing all the session files in
; /path, what this will do is use subdirectories N-levels deep, and
; store the session data in those directories.  This is useful if you
; or your OS have problems with lots of files in one directory, and is
; a more efficient layout for servers that handle lots of sessions.
;
; NOTE 1: PHP will not create this directory structure automatically.
;         You can use the script in the ext/session dir for that purpose.
; NOTE 2: See the section on garbage collection below if you choose to
;         use subdirectories for session storage
;
; The file storage module creates files using mode 600 by default.
; You can change that by using
;
;     session.save_path = "N;MODE;/path"
;
; where MODE is the octal representation of the mode. Note that this
; does not overwrite the process's umask.
session.save_path = "/tmp"

; Whether to use cookies.
session.use_cookies = 0

; This option enables administrators to make their users invulnerable to
; attacks which involve passing session ids in URLs; defaults to 0.
; session.use_only_cookies = 1

; Name of the session (used as cookie name).
session.name = PHPSESSID

; Initialize session on request startup.
session.auto_start = 0

; Lifetime in seconds of cookie or, if 0, until browser is restarted.
session.cookie_lifetime = 0

; The path for which the cookie is valid.
session.cookie_path = /

; The domain for which the cookie is valid.
session.cookie_domain =

; Handler used to serialize data.  php is the standard serializer of PHP.
session.serialize_handler = php

; Define the probability that the 'garbage collection' process is started
; on every session initialization.
; The probability is calculated by using gc_probability/gc_divisor,
; e.g. 1/100 means there is a 1% chance that the GC process starts
; on each request.

session.gc_probability = 1
session.gc_divisor     = 100

; After this number of seconds, stored data will be seen as 'garbage' and
; cleaned up by the garbage collection process.
session.gc_maxlifetime = 1440

; NOTE: If you are using the subdirectory option for storing session files
;       (see session.save_path above), then garbage collection does *not*
;       happen automatically.  You will need to do your own garbage
;       collection through a shell script, cron entry, or some other method.
;       For example, the following script would is the equivalent of
;       setting session.gc_maxlifetime to 1440 (1440 seconds = 24 minutes):
;          cd /path/to/sessions; find -cmin +24 | xargs rm

; PHP 4.2 and less have an undocumented feature/bug that allows you to
; to initialize a session variable in the global scope, albeit register_globals
; is disabled.  PHP 4.3 and later will warn you, if this feature is used.
; You can disable the feature and the warning separately. At this time,
; the warning is only displayed, if bug_compat_42 is enabled.

session.bug_compat_42 = 1
session.bug_compat_warn = 1

; Check HTTP Referer to invalidate externally stored URLs containing ids.
; HTTP_REFERER has to contain this substring for the session to be
; considered as valid.
session.referer_check =

; How many bytes to read from the file.
session.entropy_length = 0

; Specified here to create the session id.
session.entropy_file =

;session.entropy_length = 16

;session.entropy_file = /dev/urandom

; Set to {nocache,private,public,} to determine HTTP caching aspects
; or leave this empty to avoid sending anti-caching headers.
session.cache_limiter = public

; Document expires after n minutes.
session.cache_expire = 180

; trans sid support is disabled by default.
; Use of trans sid may risk your users security.
; Use this option with caution.
; - User may send URL contains active session ID
;   to other person via. email/irc/etc.
; - URL that contains active session ID may be stored
;   in publically accessible computer.
; - User may access your site with the same session ID
;   always using URL stored in browser's history or bookmarks.
session.use_trans_sid = 0

; Select a hash function
; 0: MD5   (128 bits)
; 1: SHA-1 (160 bits)
session.hash_function = 0

; Define how many bits are stored in each character when converting
; the binary hash data to something readable.
;
; 4 bits: 0-9, a-f
; 5 bits: 0-9, a-v
; 6 bits: 0-9, a-z, A-Z, "-", ","
session.hash_bits_per_character = 4

; The URL rewriter will look for URLs in a defined set of HTML tags.
; form/fieldset are special; if you include them here, the rewriter will
; add a hidden <input> field with the info which is otherwise appended
; to URLs.  If you want XHTML conformity, remove the form entry.
; Note that all valid entries require a "=", even if no value follows.
url_rewriter.tags = "a=href,area=href,frame=src,input=src,form=,fieldset="
session.save_path= C:\PHP\sessiondata   ; argument passed to save_handler

[/code]
note this is php5, and i didn;t change any original params in sessions....is there somethign i should do?
Thx

[ober]

The default installation should work with sessions unless you totally screwed up the PHP.ini file. What version are you running?

[ReVeR]

I use php 5.1.2, and apache_2.0.55-win32-x86;
Note this is running on windows xp with sp 1.

I doubt i screwed it up compeltely, becuase all i set was ability to use gfx library, as well as smtp config, but i dind;t mess with sessions.

Also, in sessions teh "/tmp" path....where should that folder be becuase it doesn;t exist for me.
Also, in sessiondata i get diffrent session data saved..but each time i go from one page to another uisng href i get a new sessiondata saved into that file...should that be like that?

Could i also get ur session config, to compare it to mine? Just to find the error.

EDIT

Updated my php.ini, it now looks like this:
[code]
session.save_handler = files
session.save_path = c:\PHP\tmp
session.use_cookies = 1
session.use_only_cookies=1
session.name = PHPSESSID
session.auto_start = 0
session.cookie_lifetime = 0
session.cookie_path = /
session.cookie_domain =
session.cookie_secure=
session.serialize_handler = php
session.gc_probability = 1
session.gc_divisor     = 100
session.gc_maxlifetime = 1440
session.bug_compat_42 = 1
session.bug_compat_warn = 1
session.referer_check =
session.entropy_length = 0
session.entropy_file =
session.cache_limiter = nocache
session.cache_expire = 180
session.use_trans_sid = 0
session.hash_function = 0
session.hash_bits_per_character = 4
url_rewriter.tags = "a=href,area=href,frame=src,input=src,form=,fieldset="
[/code]
Also, i can see session files created but they don;t do anything...any ideas where i made a mistake?