My session variables in PHP aren't saved.
In my login form the user logins and the page redirects to exec.php:
...
$_SESSION["username"] = $_POST["username"];
echo $_SESSION["username"] ==> works fine
//header("Location: home.php");
...
When I use the header instruction to return to the homepage after the session is set, the session variable is lost en I get following msg:
Undefined index: username in D:\www.xxx on line x
My session_start() statement is the very first statement on my php page. Maybe there's a problem with the timeout settings of sessions?
Thx for your help...
Ok,
Now first go and run phpinfo() then search for session and check Registered save handlers if no memcache is written check for session.save_path if not set properly, set it by editing your php.ini file.
if dont have access to the php.ini file. just insert your code in php file for setting the save path of sessions.
NOTE: Must set the directory with write permissions. i.e. CHMOD 777
your session_start() statement is in header?? if not then this could be the problem
Related
Here are the code of my login page where the login script checks for the authenticity of the user and then redirects to inbox page using header function.
<?php
session_start();
include_once('config.php');
$user=htmlentities(stripslashes($_POST['username']));
$password=htmlentities(stripslashes($_POST['password']));
// Some query processing on database
if(($id_user_fetched<=$id_max_fetched) && ($id_user_fetched!=0)){
$_SESSION['loggedIn'] = 'yes';
header("Location:http://xyz/inbox.php?u=$id_user_fetched");
//echo 'Login Successful';
}else{
echo 'Invalid Login';
echo'<br /> Click here to try again';
}
}else{
echo mysqli_error("Login Credentials Incorrect!");
}
?>
The inbox.php page looks like this:
<?php
session_start();
echo 'SESSION ='.$_SESSION['loggedIn'];
if($_SESSION['loggedIn'] != 'yes'){
echo $message = 'you must log in to see this page.';
//header('location:login.php');
}
//REST OF THE CODE
?>
Now with the above code, the inbox.php always shows the output:
SESSION=you must log in to see this page.
Which means that either the session variable is not being setup or the inbox.php is unable to retrieve the session variable. Where am i going wrong?
Make sure session_start(); is called before any sessions are being called. So a safe bet would be to put it at the beginning of your page, immediately after the opening <?php tag before anything else. Also ensure there are no whitespaces/tabs before the opening <?php tag.
After the header redirect, end the current script using exit(); (Others have also suggested session_write_close(); and session_regenerate_id(true), you can try those as well, but I'd use exit();).
Make sure cookies are enabled in the browser you are using to test it on.
Ensure register_globals is off, you can check this on the php.ini file and also using phpinfo(). Refer to this as to how to turn it off.
Make sure you didn't delete or empty the session.
Make sure the key in your $_SESSION superglobal array is not overwritten anywhere.
Make sure you redirect to the same domain. So redirecting from a www.yourdomain.com to yourdomain.com doesn't carry the session forward.
Make sure your file extension is .php (it happens!).
PHP session lost after redirect
I had the same issue for a while and had a very hard time figuring it out. My problem was that I had the site working for a while with the sessions working right, and then all of the sudden everything broke.
Apparently, your session_save_path(), for me it was /var/lib/php5/, needs to have correct permissions (the user running php, eg www-data needs write access to the directory). I accidentally changed it, breaking sessions completely.
Run sudo chmod -R 700 /var/lib/php5/ and then sudo chown -R www-data /var/lib/php5/ so that the php user has access to the folder.
If you use a connection script, dont forget to use session_start(); at the connection too, had some trouble before noticing that issue.
Maybe if your session path is not working properly you can try session.save_path(path/to/any folder); function as alternative path. If it works you can ask your hosting provider about default path issue.
Just talked to the hosting service, it was an issue at their end.
he said " your account session.save_path was not set as a result issue arise. I set it for you now."
And it works fine after that :)
Maybe it helps others, myself I had
session_regenerate_id(false);
I removed it and all ok!
after login was ok... ouch!
I had similar issue and with the cookie domain:
ini_set('session.cookie_domain', '.domain.com');
the domain was setup wrong so all sessions were ignored because the user cookie was never set right hope this will help someone.
The other important reason sessions can not work is playing with the session cookie settings, eg. setting session cookie lifetime to 0 or other low values because of simple mistake or by other developer for a reason.
session_set_cookie_params(0)
I encountered this issue today. the issue has to do with the $config['base_url'] . I noticed htpp://www.domain.com and http://example.com was the issue. to fix , always set your base_url to http://www.example.com
I was also facing the same problem i did the following steps to resolve the issue
I edited the file /etc/php.ini and searched the path session.save_path = "/var/lib/php/session" you have to give your session info
2 After that just changed the permission given below *chown root.apache /var/lib/php/session *
That's it. These above steps resolve my issue
Ensure values you write to your session are simple types. Complex types can cause all session changes to be dropped from memory.
I made the mistake of accidentally setting a session variable with an object value. This prevented the session from serializing and saving. The session appeared to be valid until the page refreshed.
A good way to verify this is to do a var_dump() of $_SESSION and exit() to ensure you are writing exactly what you expect.
echo '<pre>Session: ';
var_dump($_SESSION);
echo '</pre>';
exit();
In my case I could fix the issue by casting my username to string as follows:
$_SESSION['Username'] = (string)$userData->Username;
Cost: 1 nights sleep.
In my case none of above are working then I use ob_clean at the top and it worked like a charm.
ob_clean();
session_start();
Here are the code of my login page where the login script checks for the authenticity of the user and then redirects to inbox page using header function.
<?php
session_start();
include_once('config.php');
$user=htmlentities(stripslashes($_POST['username']));
$password=htmlentities(stripslashes($_POST['password']));
// Some query processing on database
if(($id_user_fetched<=$id_max_fetched) && ($id_user_fetched!=0)){
$_SESSION['loggedIn'] = 'yes';
header("Location:http://xyz/inbox.php?u=$id_user_fetched");
//echo 'Login Successful';
}else{
echo 'Invalid Login';
echo'<br /> Click here to try again';
}
}else{
echo mysqli_error("Login Credentials Incorrect!");
}
?>
The inbox.php page looks like this:
<?php
session_start();
echo 'SESSION ='.$_SESSION['loggedIn'];
if($_SESSION['loggedIn'] != 'yes'){
echo $message = 'you must log in to see this page.';
//header('location:login.php');
}
//REST OF THE CODE
?>
Now with the above code, the inbox.php always shows the output:
SESSION=you must log in to see this page.
Which means that either the session variable is not being setup or the inbox.php is unable to retrieve the session variable. Where am i going wrong?
Make sure session_start(); is called before any sessions are being called. So a safe bet would be to put it at the beginning of your page, immediately after the opening <?php tag before anything else. Also ensure there are no whitespaces/tabs before the opening <?php tag.
After the header redirect, end the current script using exit(); (Others have also suggested session_write_close(); and session_regenerate_id(true), you can try those as well, but I'd use exit();).
Make sure cookies are enabled in the browser you are using to test it on.
Ensure register_globals is off, you can check this on the php.ini file and also using phpinfo(). Refer to this as to how to turn it off.
Make sure you didn't delete or empty the session.
Make sure the key in your $_SESSION superglobal array is not overwritten anywhere.
Make sure you redirect to the same domain. So redirecting from a www.yourdomain.com to yourdomain.com doesn't carry the session forward.
Make sure your file extension is .php (it happens!).
PHP session lost after redirect
I had the same issue for a while and had a very hard time figuring it out. My problem was that I had the site working for a while with the sessions working right, and then all of the sudden everything broke.
Apparently, your session_save_path(), for me it was /var/lib/php5/, needs to have correct permissions (the user running php, eg www-data needs write access to the directory). I accidentally changed it, breaking sessions completely.
Run sudo chmod -R 700 /var/lib/php5/ and then sudo chown -R www-data /var/lib/php5/ so that the php user has access to the folder.
If you use a connection script, dont forget to use session_start(); at the connection too, had some trouble before noticing that issue.
Maybe if your session path is not working properly you can try session.save_path(path/to/any folder); function as alternative path. If it works you can ask your hosting provider about default path issue.
Just talked to the hosting service, it was an issue at their end.
he said " your account session.save_path was not set as a result issue arise. I set it for you now."
And it works fine after that :)
Maybe it helps others, myself I had
session_regenerate_id(false);
I removed it and all ok!
after login was ok... ouch!
I had similar issue and with the cookie domain:
ini_set('session.cookie_domain', '.domain.com');
the domain was setup wrong so all sessions were ignored because the user cookie was never set right hope this will help someone.
The other important reason sessions can not work is playing with the session cookie settings, eg. setting session cookie lifetime to 0 or other low values because of simple mistake or by other developer for a reason.
session_set_cookie_params(0)
I encountered this issue today. the issue has to do with the $config['base_url'] . I noticed htpp://www.domain.com and http://example.com was the issue. to fix , always set your base_url to http://www.example.com
I was also facing the same problem i did the following steps to resolve the issue
I edited the file /etc/php.ini and searched the path session.save_path = "/var/lib/php/session" you have to give your session info
2 After that just changed the permission given below *chown root.apache /var/lib/php/session *
That's it. These above steps resolve my issue
Ensure values you write to your session are simple types. Complex types can cause all session changes to be dropped from memory.
I made the mistake of accidentally setting a session variable with an object value. This prevented the session from serializing and saving. The session appeared to be valid until the page refreshed.
A good way to verify this is to do a var_dump() of $_SESSION and exit() to ensure you are writing exactly what you expect.
echo '<pre>Session: ';
var_dump($_SESSION);
echo '</pre>';
exit();
In my case I could fix the issue by casting my username to string as follows:
$_SESSION['Username'] = (string)$userData->Username;
Cost: 1 nights sleep.
In my case none of above are working then I use ob_clean at the top and it worked like a charm.
ob_clean();
session_start();
Here are the code of my login page where the login script checks for the authenticity of the user and then redirects to inbox page using header function.
<?php
session_start();
include_once('config.php');
$user=htmlentities(stripslashes($_POST['username']));
$password=htmlentities(stripslashes($_POST['password']));
// Some query processing on database
if(($id_user_fetched<=$id_max_fetched) && ($id_user_fetched!=0)){
$_SESSION['loggedIn'] = 'yes';
header("Location:http://xyz/inbox.php?u=$id_user_fetched");
//echo 'Login Successful';
}else{
echo 'Invalid Login';
echo'<br /> Click here to try again';
}
}else{
echo mysqli_error("Login Credentials Incorrect!");
}
?>
The inbox.php page looks like this:
<?php
session_start();
echo 'SESSION ='.$_SESSION['loggedIn'];
if($_SESSION['loggedIn'] != 'yes'){
echo $message = 'you must log in to see this page.';
//header('location:login.php');
}
//REST OF THE CODE
?>
Now with the above code, the inbox.php always shows the output:
SESSION=you must log in to see this page.
Which means that either the session variable is not being setup or the inbox.php is unable to retrieve the session variable. Where am i going wrong?
Make sure session_start(); is called before any sessions are being called. So a safe bet would be to put it at the beginning of your page, immediately after the opening <?php tag before anything else. Also ensure there are no whitespaces/tabs before the opening <?php tag.
After the header redirect, end the current script using exit(); (Others have also suggested session_write_close(); and session_regenerate_id(true), you can try those as well, but I'd use exit();).
Make sure cookies are enabled in the browser you are using to test it on.
Ensure register_globals is off, you can check this on the php.ini file and also using phpinfo(). Refer to this as to how to turn it off.
Make sure you didn't delete or empty the session.
Make sure the key in your $_SESSION superglobal array is not overwritten anywhere.
Make sure you redirect to the same domain. So redirecting from a www.yourdomain.com to yourdomain.com doesn't carry the session forward.
Make sure your file extension is .php (it happens!).
PHP session lost after redirect
I had the same issue for a while and had a very hard time figuring it out. My problem was that I had the site working for a while with the sessions working right, and then all of the sudden everything broke.
Apparently, your session_save_path(), for me it was /var/lib/php5/, needs to have correct permissions (the user running php, eg www-data needs write access to the directory). I accidentally changed it, breaking sessions completely.
Run sudo chmod -R 700 /var/lib/php5/ and then sudo chown -R www-data /var/lib/php5/ so that the php user has access to the folder.
If you use a connection script, dont forget to use session_start(); at the connection too, had some trouble before noticing that issue.
Maybe if your session path is not working properly you can try session.save_path(path/to/any folder); function as alternative path. If it works you can ask your hosting provider about default path issue.
Just talked to the hosting service, it was an issue at their end.
he said " your account session.save_path was not set as a result issue arise. I set it for you now."
And it works fine after that :)
Maybe it helps others, myself I had
session_regenerate_id(false);
I removed it and all ok!
after login was ok... ouch!
I had similar issue and with the cookie domain:
ini_set('session.cookie_domain', '.domain.com');
the domain was setup wrong so all sessions were ignored because the user cookie was never set right hope this will help someone.
The other important reason sessions can not work is playing with the session cookie settings, eg. setting session cookie lifetime to 0 or other low values because of simple mistake or by other developer for a reason.
session_set_cookie_params(0)
I encountered this issue today. the issue has to do with the $config['base_url'] . I noticed htpp://www.domain.com and http://example.com was the issue. to fix , always set your base_url to http://www.example.com
I was also facing the same problem i did the following steps to resolve the issue
I edited the file /etc/php.ini and searched the path session.save_path = "/var/lib/php/session" you have to give your session info
2 After that just changed the permission given below *chown root.apache /var/lib/php/session *
That's it. These above steps resolve my issue
Ensure values you write to your session are simple types. Complex types can cause all session changes to be dropped from memory.
I made the mistake of accidentally setting a session variable with an object value. This prevented the session from serializing and saving. The session appeared to be valid until the page refreshed.
A good way to verify this is to do a var_dump() of $_SESSION and exit() to ensure you are writing exactly what you expect.
echo '<pre>Session: ';
var_dump($_SESSION);
echo '</pre>';
exit();
In my case I could fix the issue by casting my username to string as follows:
$_SESSION['Username'] = (string)$userData->Username;
Cost: 1 nights sleep.
In my case none of above are working then I use ob_clean at the top and it worked like a charm.
ob_clean();
session_start();
I am setting user id to the session on login in my website.On echoing the session variable soon after being set, it is displayed.But after that iam redirecting this to another page where session is strated and then checked for the session.But it displays error message that undefined index user_id.This code is working in localhost,was working in server also.But now it displays error.Unable to login to the website due to the problem in setting session.
$_SESSION['user_id'] = $user_id;
header('location:home.php');
In home.php
include('session.php');
in session.php
session_save_path('include/session_store');
session_start();
if(!(isset($_SESSION['user_id'])))
{
header('location:signin.php');
}
On advise from fellow stackoverflow users ,I tried this.Created a test.php file.
session_save_path('include/session_store');
session_start();
$_SESSION['yahoo'] = 'yahoo';
header('location:test2.php');
in test2.php
session_save_path('include/session_store');
session_start();
echo $_SESSION['yahoo'];
Now in localhost yahoo is printed.But in server, blank screen is displayed.The session_store folder contain some 0kb files also.
make sure yout do session_save_path('include/session_store');
session_start(); on signin.php and also make sure include/session_store is writable
you said its working on,localhost, then definitely problem is include/session_store is not writable.
Do you have right permissions on include/session_store ? It has to be 777.
You may print echo session_save_path() to ensure that the option is setted.
And at last, without changing the save_path the session works correctly? Your server may have some redirecting rules (mod_proxy) that could have repercussion on your session.
If you have php 5.4 you could try to print session_status()
http://www.php.net/manual/it/function.session-status.php
Problem could be from the path where the session is stored
On your Web hosting file manager set the session path to /tmp/
If there's no folder called tmp then create it
I have a login page where user enters his username ans password. If successful I redirect him to index.php where I start a session:
session_start();
from index.php he can navigate to a different page ("p1.php") and on top of "p1.php" I have this check:
<?php
if(!isset($_SESSION))
{
exit;
}
?>
This works on my local server, but when I deploy this on remote server !isset($_SESSION) always returns true.
What could be happening here?
EDIT: I found on my hosting provider side a request to add this in php.ini:
session_save_path("your home directory path"/phpsessions);
And to create a phpsessions folder in my path.
I did but that didn't help.
I tried to do this as well:
in index.php:
session_start();
if(isset($_REQUEST['lecturer_id']))
{
echo "lecturer_id set";
$_SESSION['lecturer_id'] = $_REQUEST['lecturer_id']; // store session data
}
and in p1.php:
session_start();
if(!isset($_SESSION['lecturer_id']))
{
exit;
}
And the page always exits i.e. session variable is not defined
The server is most likely creating a PHP session silently which your local server is not configured to do.
Try checking for a specific $_SESSION eg $_SESSION['x'] rather than just a $_SESSION.
Edit:
Instead of checking isset($_SESSION) you should check for whatever session variable you set specifically: isset($_SESSION['SESSION_VARIABLE_YOU_SET'])
isset($_SESSION) returns true once session_start() is called, that's why you need to check for the specific $_SESSION variable you set
You'll just need to make sure you have session_start(); at the very top of your p1.php page and any page that uses session data.
Probably the remote server is configured for session autostart. If you can configure this php instance you can check it in php.ini file (session_autostart directive).
Update: Sorry, I did not understand correctly your question. Really, if session autostart is set to "on" session always exists. You can not use isset($_SESSION) to determine if user is logged or not.
I encountered the same scenario and what I did was I unset the first the variable for example, $_SESSION['loggedin']),
I will unset it first using :
session_start();
unset($_SESSION['loggedin']);
then i will comment out unset($_SESSION['loggedin']);
the problem solved.