I am a beginner in PHP.
I am receiving the following errors. I cannot view the error from my computer on FF, IE, and Chrome, but yet I see the error up top when browsing from another computer's browser.
Warning: session_start() [function.session-start]: open(/tmp/sess_c464nadk4jsn4u43mpqipkjbr7, O_RDWR) failed: Permission denied (13) in "file location" on line X
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at "file location":line X) in "file location" on line X
Any ideas anyone?
I have the session_start() before the includes which means before any html, and the session is only used to carry over one variable.
I tried placing it before
Header("Cache-control: private, no-cache");
Header("Pragma: no-cache");
but this only generated more Warning signs. Any help would be appreciated!
seems that the /tmp/ dir is not readable or writable by the user php is running as.
Is there any whitespace or any other character before the <?php starting tag?
Is the session_start() really the first statement within the php block?
The "headers already sent" error is caused by the first one. The other answers here trying to debug it aren't going to help you. Fix the first error and the second will go away. The first error tells you what your problem is already - the /tmp directory is not writable by the web server. /tmp is usually 777 (rwxrwxrwx).
The first error seems to indicate missing write permission in the temp directory but could be linked to the second one also.
The second error normally only happens when there is some kind of output is being sent from your php script before the session_start() call, because will automatically send HTTP headers. This can be any kind of html or even blank lines or spaces in the file before the actual call or before the <?php opening bracket. As Shane suggests in a comment, the reason for the second error could very well be that the error message from the first error (unable to write the session to a file in /tmp) causes headers to be sent and thus it is too late to send them with the header() call.
Related
Hi I have a php file that is empty and the only line of code in there is
<?php session_start(); ?>
No html mark-up or any php code besides the code above.
On localhost it doesn't trigger an error, but when it's on the server and I visit the page, a new line is printed on the error log that says
[25-Apr-2016 05:43:34 UTC] PHP Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at path/to/file.php:1) in /path/to/file.php on line 1
The server is running apache and php 5.6 if that's relevant, I've also tried deleting the .htacces file just in case that is what's causing the problem but still no luck.
Can anyone point me in the right direction to see what may be causing the issue? Thanks!
Problem : Sometimes there are invisible characters inside your code file.
Solution :
So simply for now if want to fix the error so here is the quick way to do it :
I am sure you must be using some sort of Code Editor just simply save your php file with encoding as "UTF-8 With BOM" and then upload the saved file to your site and then access your file and you will have no problem..!
Screenshot For Better Guidance :
Reference URL :
How to fix "Headers already sent" error in PHP
If that doesn't solve your problem so then use this solution :
Make sure there is absolutely no whitespace before <?php
Put session_start() before ob_start() instead of after it.
If that fails, try commenting out the session_start() as one of your
includes might already be starting the session, like so: /** session_start(); **/
Hi I would really appreciate some help. I get the following errors at http://www.bookapartmentsinyork.co.uk/
Warning: session_start() [function.session-start]: open(/home/content/05/11475705/tmp/sess_o4ml0j7uuo01pffbonlpdpi8p2, O_RDWR) failed: No such file or directory (2) in /home/content/05/11475705/html/wp-content/plugins/quitenicebooking/includes/quitenicebooking.class.php on line 141
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/content/05/11475705/html/wp-content/plugins/quitenicebooking/includes/quitenicebooking.class.php:141) in /home/content/05/11475705/html/wp-content/plugins/quitenicebooking/includes/quitenicebooking.class.php on line 141
I have tried so many thing but it's all got pretty confusing for me. I'm using GoDaddy,
The error was caused after changing from a Windows to Linux server. I am very new so please try to help me in your explanations as I may get confused easily :) Thank you!
It looks like the 'quitenicebooking' plugin is trying to read session storage data which does not exist.
The subsequent errors regarding headers already sent is just a consequence of the fact that the first error appears.
You could try changing the session storage location using ini_set().
Be sure to set session_start() at the very beginning of your file.
You're getting this error because the header are already sent.
I have just moved over to a linux server on my shared hosting to see if it is less rubbish than a windows server on godaddy (I have been stupid enough to have paid them 12 months up front so I am stuck with those idiots now). I am now no longer able to use any kind of sessions at all.
They have got back to me saying that it is up to me to resolve the issue to get it to work... yes that is right... TO GET SESSIONS TO WORK! Excuse me if I seem a little irate but I am furious.
Can someone please inform me how I can in some way get sessions to work on an Apache server? I have never had to set this up before because it has never been a problem. As soon as I do:
<?php session_start() ?>
... it is just coming up with about 8 lines of errors saying that:
Warning: session_start() [function.session-start]: open(/var/chroot/home/content/30/10247530/tmp/sess_sgruthqkbhfms6ekcle2l0n6i5, O_RDWR) failed: No such file or directory (2) in /home/content/30/10247530/html/sessionthing.php on line 2
Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/content/30/10247530/html/sessionthing.php:2) in /home/content/30/10247530/html/sessionthing.php on line 2
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/content/30/10247530/html/sessionthing.php:2) in /home/content/30/10247530/html/sessionthing.php on line 2
Warning: Unknown: open(/var/chroot/home/content/30/10247530/tmp/sess_sgruthqkbhfms6ekcle2l0n6i5, 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
I have tried creating a php.ini file and I still cannot get it to work properly. I have checked the settings using phpinfo() and I genuinely do not know where to go from here.
EDIT: There are a few things appearing down the side of the page now pointing to similar problems. For some reason I did not come up with those when I did a search. One of them is even closed: https://stackoverflow.com/questions/11374110/session-start-errors-on-godaddy-server?rq=1
That one says that they got it resolved with Godaddy so I think I will have to go back to them and tell them to sort it out. It is not that I do not want to learn how to configure the server... it is just that sessions should just work.
Make sure that there are no other <?php session_start() ?> declared, and try set your own session temp path,
<?php
if (!is_dir(session_save_path())) {
session_save_path ('your/custom/existing/directory');
}
session_start();
?>
PHP is trying to save the session in /var/chroot/home/content/30/10247530/tmp/, and it can't open that directory (either because it doesn't exist or because it doesn't have write permissions to it). Investigate PHP's access to this path and I believe that you'll get your sessions working - maybe you overlooked a config variable when you migrated your code to the new server?
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>
This question already has answers here:
How to fix "Headers already sent" error in PHP
(11 answers)
Closed 9 years ago.
Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/moonpk/public_html/wallz/preview.php:16) in /home/moonpk/public_html/wallz/loginbox.php on line 2
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/moonpk/public_html/wallz/preview.php:16) in /home/moonpk/public_html/wallz/loginbox.php on line 2
i am getting these two warning which i was not getting on local server... why ....
See the first note on the php session_start() page. session_start() sends cookies to the browser, and the server will not send any additional data (including cookies) after any data has already been sent. This can simply be fixed by making sure that nothing is being sent to the browser (such as an echo() or var_dump() call) before calling session_start().
You don't get them on local server because you have lower errer reporting level on it. So, you need:
On you local server edit php.ini and set error_reporting to E_ALL
Move you session_start() call before line 16 of you /home/moonpk/public_html/wallz/preview.php file
Most likely you have some whitespace outside any PHP-tags in files that are loaded before the session_start() is executed. Maybe your FTP client messed things up?
You probably had warnings suppressed on your local server? The issue is that you have some output before you call session_start. Judging by the line numbers, I'd guess you have a line break before your opening php tag, but without seeing the code, can't provide a full solution.
If you are including the page "preview.php" within "loginbox.php" check that you have only called session_start once on one page.
Either on preview.php or loginbox.php , not both.