This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Headers already sent by PHP
Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/eitlabs1/public_html/salmanoreen.com/index.php:1) in /home/eitlabs1/public_html/salmanoreen.com/libraries/joomla/session/session.php on line 423
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/eitlabs1/public_html/salmanoreen.com/index.php:1) in /home/eitlabs1/public_html/salmanoreen.com/libraries/joomla/session/session.php on line 423
Warning: Cannot modify header information - headers already sent by (output started at /home/eitlabs1/public_html/salmanoreen.com/index.php:1) in
There are something that can cause this problem when you have session in your codes:
Having a white space before <?php
Having something before session_start() in your HTML codes.
Your PHP file has saved with BOM supporting option. Remove BOM from your file.
It's caused by text written to the web page before the call to session_start(). You can't have any text - even a carriage return - before the session_start() function call.
the error is triggered because you output something before the session_start() call. session_start should always be placed before any output or else it will produce an error like yours.
you are probably doing something like this:
<?php echo "test";
session_start();
?>
it should be
<?php session_start();
echo "test";
?>
There is also a possibility you have edited a file through ftp and a "invisible" character was added at the start of the file (boom operator).
This is not necessarily a session problem. This is usually the result of a different error message that is being sent to the web browser. As soon as any text is to be sent, php sends headers beforehand. After the text is sent, the session cannot be started because this also requires sending headers, but headers have to be sent all in one go before any other output. This means you must find the original error first.
Related
This question already has answers here:
Warning: Cannot modify header information - headers already sent [duplicate]
(4 answers)
Closed 7 years ago.
This is my code:
<?php
$value = 'something from somewhere';
setcookie("TestCookie", $value);
?>
I am getting the error message as follows:
Warning: Cannot modify header information - headers already sent by
(output started at /home/nairsoft/public_html/page1.php:2) in
/home/nairsoft/public_html/page1.php on line 4
I am using a free webhosting server.
The headers are sent at the beginning of a request before the body of the server's response. It looks like your code already sent the headers so you can't modify them. As Afaan suggested, make sure you don't ouput anything before the opening php tag.
In general, it is a good idea to process everything you need at the beginning of the request before sending any of the response.
The above problem is solved by saving my code in ANSI instead of UTF-8
Cookie is a part of headers and headers must be sent before any actual output to the browser. Make sure that you set your cookies and other headers before you output anything. It has nothing whatsoever to do with what type of hosting package you have.
This question already has answers here:
How to fix "Headers already sent" error in PHP
(11 answers)
Closed 9 years ago.
I have written <?php session_start(); ?> above everything in all pages. Some pages are rendering fine but I am getting this error in other pages. I have checked and matched each page code and code is fine. If I remove <?php session_start(); ?> then page renders fine but I need to use session.
Cannot send session cache limiter - headers already sent (output started at /home/) in ...
One thing to note is: It runs fine on my local server.
I would bet it's one of two things:
Make sure there is no output, including newlines, in your file before you call session_start. PHP must send HTTP headers first (before the message body, i.e. page content), so trying to send a header after you've already sent page content will give you that error.
You should only call session_start only once per page. If you're using include in a file after you've called session_start, make sure you're not calling session_start again in the included file. This would cause the "headers already sent" error.
you have some output (maybe an whitespace) in one of your included files.
maybe your <?php is not the very first of your file somewhere.
You could also try to use output buffering (http://php.net/manual/es/function.ob-start.php). I'd first check to see whether you are not sending any output by mistake (as #steven suggests), but still, it might be a good idea for you to buffer your outputs.
Since you are including multiple files, and you seem to have a session_start() in multiple files, I bet the error is thrown in the second file.
Check all files for the session_start(), and for whitespace before any of these are called.
This is a very typical BOM header problem. I suspect that your editor stored a UTF-8 BOM header with 3 bytes  at the begin of the file. The editor will hide them, so if you are not sure if your file contains these characters, you can either use a non interpreting editor (hex editor), or this wonderful online W3C checker.
I am currently getting the following error using php:
Warning: session_start() [function.session-start]:
Cannot send session cache limiter - headers already sent
(output started at /home/paramireze/madisonh3.com/calendar.php:1)
in /home/paramireze/madisonh3.com/includes/common.php on line 5
The first line of every file is include common.php, and the first line of code in common.php is 'if(!isset($_SESSION)) {session_start();}`.
This error only occurs on calendar.php and news.php (you can see the error if you visit http://www.madisonh3.com/calendar.php). All my files are the same, which includes a common.php. After that, I will write the html tag and include the header from there.
I've read other discussions regarding session_start and all say to make sure you do not output any html before session_start. Also, if I am doing something wrong, why is it only happening to two out of my 10 files?
There is something outputting data BEFORE your session_start() command. As the session cookie is set to the HTTP header it must precede any HTML output.
The error Cannot send session cookie - headers already sent by (output started at /home/paramireze/madisonh3.com/calendar.php:1) in /home/paramireze/madisonh3.com/includes/common.php on line 5 indicates something is outputted before.
So look into your code and find what could be echoing data before your session_start().
You should care that your editor does not store the utf-8 BOM header, this header is sometimes stored at the begin of the file with 3 bytes .
The editor will hide them, so if you are not sure if your file contains these characters, you can either use a non interpreting editor (hex editor), or this wonderful online W3C checker. The BOM header is treated as output by PHP, and this can cause nasty Cannot modify header information - headers already sent errors.
Checking your URL shows, that there is indeed such a BOM header. Have a look at the settings of your editor (IDE).
This question already has answers here:
How to fix "Headers already sent" error in PHP
(11 answers)
Closed 9 years ago.
I am trying to insert a form script into my home page index.php by using the following line of code.
<?php include('email-system/index.php'); ?>
and continue to get the two error messages below. The form shows up, but I get this error below quite often when trying to insert script into my home page using the include statement. I have read in a number of different places that it could be white space. Since the file works fine if you go to www.mysite.com/email-system/index.php I'm assuming that it's not white space. Any ideas on what my problem is and how I could insert the code and correct the errors? Thank you in advance.
Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/content/84/8661784/html/header.php:7) in /home/content/84/8661784/html/email-system/index.php on line 6
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/content/84/8661784/html/header.php:7) in /home/content/84/8661784/html/email-system/index.php on line 6
You will only get that if you are echoing output before the include statement.
Make sure whatever you need is included / loaded before you send output to the user.
This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
Warning: Cannot modify header information. Can't find error
a tough question. :)
I have a php script that upon a form submit verifies username and password against a DB and, if they're OK,
setcookie("call_admin_uin", $login , $expire);
setcookie("call_admin_pass", $password , $expire);
There is NO html before that. Nothing is echo-ed out and it works fine on my localhost and on one other server. Yet, when I upload it to my main server it gives out this:
Warning: Cannot modify header information - headers already sent by (output started at /home7/pnstatsc/public_html/admin/index.php:6) in /home7/pnstatsc/public_html/admin/index.php on line 72
Warning: Cannot modify header information - headers already sent by (output started at /home7/pnstatsc/public_html/admin/index.php:6) in /home7/pnstatsc/public_html/admin/index.php on line 73
So I guess there could be something wrong with the server setting... any idea what it might be?
Thanks!
You probably have some whitespace before an opening <?php somewhere. First, I would see what the output of headers_list() is -- that will tell you which headers have been sent, then I would go through and see what headers_sent($filename) and, if necessary, headers_sent($filename, $line_number).
If you're desperate, then you can always use ob_start and buffer your output, but that is overkill.
There must have been some output.
You can use headers_sent to track down the file and line where headers have been sent.