I have multiple sites hosted on a server and most of them use sessions when users login.
for example, i have a session variable $_SESSION["loggedin"] = 'yes' if the users login is successful.
this is the same on multiple sites but if i login to say 2 sites at the same time one of them will stop working and display these errors:
Warning: session_start() [function.session-start]: open(/tmp/sess_8f7b4997fbfdd08855a410ae4638821f, O_RDWR) failed: Permission denied (13) in /home/theboaty/public_html/new_site/admin/authorisation.php on line 2
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/theboaty/public_html/new_site/admin/authorisation.php:2) in /home/theboaty/public_html/new_site/admin/authorisation.php on line 2
Warning: Cannot modify header information - headers already sent by (output started at /home/theboaty/public_html/new_site/admin/authorisation.php:2) in /home/theboaty/public_html/new_site/admin/authorisation.php on line 5
Warning: Unknown: open(/tmp/sess_8f7b4997fbfdd08855a410ae4638821f, O_RDWR) failed: Permission denied (13) in Unknown on line 0
Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0
Note: authorisation.php checks for the loggedin session variable to see if the user is logged in or not
I have much the same problem because I use a custom user handler that takes sessions.
I found that logging onto two different related sites on the same server using the same browser window but with different tabs there was crosstalk.
If this is not acceptable, I suggest you rename your session variables by site vis:
$_SESSION['site1']['isloggedin']=1;
Related
newb here, new to working with localhost in OS X.
I am running a MAMP stack on OS X. My session test file returns a series of warnings which I believe is due to the inability to write to the sessions folder which I have not been able to set to 0700.
I've checked for:
white space
file path http://localhost/sessions/
folder name (sessions)
I believe the problem is a permission issue. I am looking to be able to write to my localhost directory session folder. To do this I need to set the permission of the folder to 0700. I am hoping to find an solution that I can replicate with my limited level of expertise at this time.
This is the code:
<?php
ini_set('session.save_path','/htdocs/sessions');
session_start();
$_SESSION['test'] = "If you can read this, sessions are working!";
print $_SESSION['test'] . "<br>";
print "Session ID is: ". session_id()."<br>";
?>
These are the errors which only appear when i run local:
Warning: session_start(): open(/htdocs/sessions/sess_d1c5ef5a18bb844bfc667a0fc911191f, O_RDWR) failed: No such file or directory (2) in /Applications/MAMP/htdocs/review/itc240f/a_070-adminer/sessionTest.php on line 3
Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /Applications/MAMP/htdocs/review/itc240f/a_070-adminer/sessionTest.php:3) in /Applications/MAMP/htdocs/review/itc240f/a_070-adminer/sessionTest.php on line 3
Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /Applications/MAMP/htdocs/review/itc240f/a_070-adminer/sessionTest.php:3) in /Applications/MAMP/htdocs/review/itc240f/a_070-adminer/sessionTest.php on line 3
If you can read this, sessions are working!
Session ID is: d1c5ef5a18bb844bfc667a0fc911191f
Warning: Unknown: open(/htdocs/sessions/sess_d1c5ef5a18bb844bfc667a0fc911191f, O_RDWR) failed: No such file or directory (2) in Unknown on line 0
Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/htdocs/sessions) in Unknown on line 0
/htdocs/sessions
does it exist? And, why would you choose to use a root directory in MacOSX? Perhaps you should map it to your user folder.
/Users/username/htdocs/session
I'm having this problem when I load my page with HTTPS.
Warning: session_start() [function.session-start]:
open(/home/user/session/sess_8a4426cc2cd02f1a5813f43585845b75, O_RDWR)
failed: Permission denied (13) in /home/user/www/index.php on line 3
Warning: session_start() [function.session-start]: Cannot send session
cache limiter - headers already sent (output started at
/home/user/www/index.php:3) in /home/user/www/index.php on line 3
and it keeps reloading and reloading.
I've seen a lot of topics similar to this, like How can I fix the Permission error when I call session_start()? but none of them seem to have this problem only on HTTPS.
If I use HTTP I'm fine.
Is there an SSL configuration restricting my permissions?
What should I do to fix this?
Thank you very much!
I just upgraded my hosting plan, and now the user session isnt' working anymore. Users can't access the mebership area when they login, and here are the errors that are shown when opening my website:
Warning: session_start() [function.session-start]: open(/home/content/15/9277415/tmp/sess_enersdnbm88g5detjemgnptu47, O_RDWR) failed: No such file or directory (2) in /home/content/15/9277415/html/include/config.php on line 14
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/content/15/9277415/html/include/config.php:14) in /home/content/15/9277415/html/include/config.php on line 14
Warning: Unknown: open(/home/content/15/9277415/tmp/sess_enersdnbm88g5detjemgnptu47, O_RDWR) failed: No such file or directory (2) in Unknown on line
Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct () in Unknown on line 0
In config.php line 14 we have the session variables:
if(!session_id()) session_start();
if (!isset($_SESSION)) $_SESSION=array();
Does anybody have any idea why is this happening or how to fix it? These errors werent showing before the hosting plan upgrade.
Make sure that the directory /home/content/15/9277415/tmp exists and is writable by the webserver.
I am trying to run this code in my server
<?php
session_start();
?>
I am getting following warning messages. I never saw such warning before .
Warning: session_start() [function.session-start]: open(/var/chroot/home/content/00/6684400/tmp/sess_uoouukt8m6efc0nc2ar5t2vq94, O_RDWR) failed: No such file or directory (2) in /home/content/00/6684400/html/html-tweetcomments/y.php on line 2
Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/content/00/6684400/html/html-tweetcomments/y.php:2) in /home/content/00/6684400/html/html-tweetcomments/y.php on line 2
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/content/00/6684400/html/html-tweetcomments/y.php:2) in /home/content/00/6684400/html/html-tweetcomments/y.php on line 2
Warning: Unknown: open(/var/chroot/home/content/00/6684400/tmp/sess_uoouukt8m6efc0nc2ar5t2vq94, O_RDWR) failed: No such file or directory (2) in Unknown on line 0
Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct () in Unknown on line 0
how can i solve this problems?
Make sure, folder /var/chroot/home/content/00/6684400/tmp exists and is writable by PHP
sudo mkdir -p /var/chroot/home/content/00/6684400/tmp/
sudo chmod 1777 /var/chroot/home/content/00/6684400/tmp/
session_start() sets a cookie containing the session id. In the HTTP protocol, Cookies are sent in the HTTP header Set-Cookie.
If you send any output (including PHP warnings), this will be written into the HTTP answer body and PHP is no longer able to send a header.
To make sure the HTTP response body is written at the very end you can add a ob_start() at the very beginning of your PHP script.
This creates a output buffer which will be automatically flushed to output when the script reaches the end.
References
PHP Session
Sticky Bit
HTTP Cookies
PHP ob_start()
Problem with permissions.
Check tmp folder permissions. Make it writable.
Failed to write session data (files).
Also, check there's no HTML or whitespace before session_start()
Warning: session_start() [function.session-start]: Cannot send session
cookie - headers already sent by (output started at
/home/content/00/6684400/html/html-tweetcomments/y.php:2) in
/home/content/00/6684400/html/html-tweetcomments/y.php on line 2
Something is being printed before your session_start call. Check for any echo or even any blank space in html, before your call
The clue is the first error:
open(/var/chroot/home/content/00/6684400/tmp/sess_uoouukt8m6efc0nc2ar5t2vq94, O_RDWR)
failed: No such file or directory (2)
It looks like the directory that is being referenced for the session files either doesn't exist or isn't writable by the web user (user as which the web server is running).
Check that the directory exists - create it if not.
Ensure that it is group writable by the web server user.
The first error is causing the rest of the errors;
If there is same output before php code, move it after the php code
Example:
<script>
...javascript code...
</script>
<?php
session_start();
?>
move the script tag after the php tag. Like this:
<?php
session_start();
?>
<script>
...javascript code...
</script>
I get a session error which I did not have before which is strange.
Warning: session_start() [function.session-start]: open(/tmp/sess_6768c4a8b1cff40d24a3a87de701c865, O_RDWR) failed: Read-only file system (30) in /home/public_html/ctcms/index.php on line 4
Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/public_html/ctcms/index.php:4) in /home/public_html/ctcms/index.php on line 4
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/public_html/ctcms/index.php:4) in /home/adrian/public_html/ctcms/index.php on line 4
Warning: Cannot modify header information - headers already sent by (output started at /home/public_html/ctcms/index.php:4) in /home/public_html/ctcms/library/CT/Controller.php on line 40
Warning: Unknown: open(/tmp/sess_6768c4a8b1cff40d24a3a87de701c865, O_RDWR) failed: Read-only file system (30) in Unknown on line 0
Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0`
I have only session_start(); in my index.php at line 4. How can I fix this?
Your /tmp/ folder isn't writable. Make it writable.
chmod u+w /tmp/
You can test it with is_writable(session_save_path()).
Warning: session_start() [function.session-start]: open(/tmp/sess_6768c4a8b1cff40d24a3a87de701c865, O_RDWR) failed: Read-only file system (30) in /home/public_html/ctcms/index.php on line 4
It looks like /tmp is on a read-only file system. This is not normal. Tell your sysadmin/hosting provider to have a look at it; the machine may have a serious problem.
If the machine is yours, check the logs for any errors related to the file system and try to remount the disk in read-write (mount -o remount,rw /dev/yourdevicehere).
Yuo can't write on /tmp/
Make it writable and redo the operation.
Moreover, remember that session_start() have to be the first operation that you do on the page.
Take a look: php manual
This was a known bug in version(s) of PHP . Depending on your server environment, you can try setting the sessions folder to 777:
/var/lib/php/session (your location may vary)
I ended up using this workaround:
session_save_path('/path/not/accessable_to_world/sessions');
ini_set('session.gc_probability', 1);
You will have to create this folder and make it writeable. I havent messed around with the permissions much, but 777 worked for me (obviously).
Make sure the place where you are storing your sessions isn't accessible to the world.
This solution may not work for everyone, but I hope it helps some people!
please select an answer and mark accordingly.