i have such problem: when i'm starting session in php there are no errors, session_start return true, but no data stored in session, session file is empty and session_id always different. what reason?
ini_set('session.use_cookies', '0' );
ini_set('session.use_trans_sid', '1' );
session_start();
if (isset($_SESSION['test']))
echo($_SESSION['test']);
$_SESSION['test'] = 'test';
echo("<a href='test.php?".SID."'>refr</a>");
Check you have write permission to session.save_path. Check the log files.
Enable cookies on the browser you're testing it on. Use session_start() on every page you wish to access the session variables.
If you're manually adding the session_id to the url, clear your cookies first. There are also security settings that may block you resuming sessions in that manner.
Are you adding content to the session? Other than the session ID, the session will always be blank upon creation- until you create/set some $_SESSION variables.
Note also, the $_SESSION id will always be different between browsing 'sessions'.
See here:
If id is specified, it will replace
the current session id. session_id()
needs to be called before
session_start() for that purpose.
http://php.net/manual/en/function.session-id.php
You're using the transparent sid feature, yet you're appending it manually, but in the wrong way.
I recommend this instead:
ini_set('session.use_cookies', '0');
ini_set('session.use_trans_sid', '0');
session_start();
if (isset($_SESSION['test']))
echo($_SESSION['test']);
$_SESSION['test'] = 'test';
echo("<a href='test.php?PHPSESSID=".session_id()."'>refr</a>");
Related
A novice php learner. I read in a book, and continue to see this at certain forums and tutorials that the statement: session_start() is required to access all global session variables. And yet, multiple solutions offered at stackoverflow suggest using a block of this sort:
if(!(_isset($_SESSION['user']))){
session_start()
}
to be able to access the session variables. Based on my understanding, the session variable $_SESSION['user'] could only have been set at a previous php file by starting a session, and is "only" visible to the current page after the session_start() statement is called. Yet it produces the notice:
Notice: A session had already been started - ignoring session_start().
what am i missing?
Thanks everybody!
Your first block of code should be checking if the session variable is set, rather than the user variable exists in the session:
if(!isset($_SESSION)) {
session_start();
}
However, if you just ensure that you only have a single session_start() per page then you can avoid the "A session had already been started" notice.
session_start() is required to read / set any session variables.
Generally, I would think your code should look like this:
session_start()
if(!(_isset($_SESSION['user']))){
// do stuff here
}
However, the error message implies that you have already started the session elsewhere in your file.
You might have auto_start turned on somewhere (php.ini, .htaccess, etc)?
http://www.php.net/manual/en/session.configuration.php#ini.session.auto-start
Here is a scenario where your error would be triggered :
index.php:
<?php session_start();
require_once('some-page.php'); ?>
some-page.php:
<?php session_start(); // this would make an error when included to index.nl ?>
some-page.php should not have session-start in it as index.php already has started the session.
Also note that going to another page or even closing the tab will not reset your session variables ! so if you set S_SESSION['user'] = 'someuser'; , you close the tab and go to the website again, the session is still there and $_SESSION['user'] would still have someuser as value ! to manualy destroy the session , use session_destroy();
Newbie question, but I'm wondering if I'm missing something elementary here.
If I register a session variable in a page - isn't this variable supposed to be accessible from another page on the same site?
First, I register a variable in the file session_var_register.php:
<?php
$_SESSION["myusername"] = 'user';
if (isset($_SESSION['myusername'])) {
echo 'Session var myusername is set to '.$_SESSION['myusername'];
}
?>
When I open this page, it writes:
Session var myusername is set to user
As expected.
Then I open another tab and another page, check_session_var.php:
<?php
if (isset($_SESSION['myusername'])) {
echo 'Session var myusername is set to '.$_SESSION['myusername'];
}
?>
This page is blank.
Isn't the point of a session variable that it should be accessible in the browser session, until the session is programatically destroyed or the browser closed?
I'm using IE 8 and Firefox 24, btw. Identical results.
You forgot
session_start()
On top, before using
$_SESSION
PS: Remember to call session_start() in every page you want to use $_SESSION.
The PHP docs state that you must call session_start() to start or resume a PHP session. This must be done before you try to access or use session variables. Read more here.
session_start();
Your session variables will be available on different pages of the same site but on top of each of these pages you must have at least:
session_start();
It works but not in all cases. You must also use the same session name (essentially a cookie name that stores id of your session) on all pages. Moreover cookies (which are essential (mostly) for sessions to work) may be made visible only in specific directory. So if for example you share the same host with other guys that use sessions too you do not want to see their variables and vice versa so you may want to have sth like that:
1) session_name( 'my_session_id' );
2) session_set_cookie_params( 0, '/my_dir', $_SERVER['HTTP_HOST'], false, true );
3) session_start();
You may also want to see your session variables on other servers and in such case custom session handlers may be useful. Take a day or two to implement yourself - great way to understand how sessions work hence I recommend.
Method
session_start();
Description
session_start() creates a session or resumes the current one based on a session identifier >passed via a GET or POST request, or passed via a cookie.
Usage in your case (and in the most of cases):
Put it before the $_SESSION usage.
Reference: session_start()
First Of all start session on that page
session_start();
your page like this way
<?php
session_start();
if (isset($_SESSION['myusername'])) {
echo 'Session var myusername is set to '.$_SESSION['myusername'];
}
?>
I installed a pre-built forum on my website and I want (in a diffrent page) to check if the forum's session is active.
Something like :
if (isset($_SESSION['forum'])) { echo "Session is active!"; }
Problem is - I don't know the sessions name...
Tried downloading some chrome add-ons for session managing but I can't get the name of the session.
Whats the right way of doing this?
Thanks ahead!
You can see the dump of $_SESSION variable
var_dump($_SESSION);
session_name() will give you the session name, that usually is defined in php.ini. By default it is always: PHPSESSID. This name is used as cookie name or as POST/GET variable name.
session_id() will give you the identifier for the current session. It will be the contents of the cookie or POST/GET variable.
Then you have $_SESSION that will contain all your session data. use print_r() to see what you have stored in it so far.
To know if session vars are set you can also just do if(isset($_SESSION)&&count($_SESSION))
try
print_r ($_SESSION);
taht way you'll see all sessions
<?php
session_start();
print_r($_SESSION);
?>
Use this to see which session variables are currently set.
You need to check that the session is currently active, and then that the forum key is defined
if ( ! ($sid = session_id()) {
session_start(); // open session if not yet opened
$sid = session_id(); // get sid as session ID
}
// $sid contains the session ID (in cookie)
if (isset($_SESSION['forum'])) {
// forum is defined
}
See also the answer from this page
I have this query in mysql in a php page:
mysql_query("INSERT INTO tz_todo SET text='".$text."',
position = ".$position.",
user_id=".$_SESSION['user_id'].",
view_stat=0");
I tried to echo the query and the result is this:
INSERT INTO tz_todo SET text='trial text', position = 21, user_id=, view_stat=0
it seems that it can't get the session value of user_id.
And $_SESSION['user_id'] is not working in social engine. How to correct this? I also made a localhost version in my xampp and everything is fine but when I converted it into social engine, session is not working.
In any page where you are using session objects, place this code at the beginning of the file:
if(!isset($_SESSION)){session_start();}
This way if the session is not already started, it starts it; otherwise it ignores the session start if the sesion is already started.
This is important because calling session_start() if session is started already can sometimes cause errors.
That's how I get my user id through session
session_start();
$userID = $viewer->getIdentity();
$_SESSION['user_id'] = $userID;
echo $_SESSION['user_id'];
Using session to store the user_id is totally wrong. To gain a user_id try
$viewer_id = Engine_Api::_()->user()->getViewer()->getIdentity(); (or $user->getIdentity if you have another user's object).
If you still need to use session for storing this data, use Zend-approach.
session_start();
$_SESSION["test"] = "hello world";
session_start();
echo $_SESSION["test"];
does above code work ? if not, check your session.save_path in the php.ini
NOTE: to retain this variable remember to call session_start() on each php script/page before calling for the variable from the session.
Yoy might be forget to start your session at the top of the page
<?php if(!isset($_SESSION)){ session_start(); } ?>
$_SESSION['user_id'] might not stored a value. check your login page (Basically after login session variables will set) or after register weather you assigned a value to that session variable..
setting a value to a session variable :
$_SESSION['user_id'] = "1234567";
I'm making somewhat of a "module" that gets included into another unrelated PHP application. In my "module" I need to use sessions. However, I get the 'session has already been started...' exception. The application that my "module" is included into is starting the session. If I cannot disable sessions in this application, what are my options? I'd like to use Zend_Session, but it seems upon first glance that it is not possible. However, maybe there is another way? Any ideas?
Thanks!
With PHP’s session implementation, there can only be one session at a time. You can use session_id to check if there currently is a session:
if (session_id() === '') {
// no current session
}
Now if there is already an active session, you could end it with session_write_close, change the session ID’s name with session_name to avoid conflicts, start your session, and restore the old session when done:
$oldName = session_name();
if (session_id() !== '') {
session_write_close();
}
session_name('APPSID');
session_start();
// your session stuff …
session_write_close();
session_name($oldName);
session_start();
The only problem with this is that PHP’s session implementation does only send the session ID of the last started session back to the client. So you would need to set the transparent session ID (try output_add_rewrite_var) and/or session cookie (see setcookie) on your own.
Try setting a custom "name" parameter for your application.
The default is PHPSESSID. You can change it to PHPSESSID_MYAPP to avoid conflicts with the other app.
Add the following code before you want to use the Session feature:
#session_start();