Headers Already Sent Error !

Hi,

We came across this problem once we upgraded our test system to the latest version when a new user tries to create a new account:

Warning: Cannot modify header information - headers already sent by (output started at /hsphere/local/home/proloc10/test.boardgameclub.co.uk/includes/application_top.php:937) in /hsphere/local/home/proloc10/test.boardgameclub.co.uk/includes/functions/functions_general.php on line 52

After reading some threads and the FAQ's it sound like a space at the end of a line somewhere ?, trouble is, not knowing PHP which file should I be looking at ??

Thanks in advance.

Chris.

The first place to look is in the two files mentioned in the error messages. You mentioned that this is error occured after upgrade to the latest version: the error message indicates line 937 of includes/application_top.php but that file in v1.3.0.1 only has 124 lines. Did you upload all of the new files?

This error usually occurs if you have an empty line or space after the last line of your code.

You have probably edited a file, and at the end of the code for example..

</php> space
or space

delete up to the very last character.
This solved my problem when this occurred.

Thanks for the reply's all,

I reinstalled and this fixed the problem, I did it quite late at night and probably did not pay attention to the job at hand........

Thanks again for your quotes.

Regards

Chris.

i've got into the same problem.
when customer try to change the billing address, he gets this error:

Warning: Cannot modify header information - headers already sent by (output started at /home/shoptwa/public_html/includes/languages/english/checkout_payment_address.php:79) in /home/shoptwa/public_html/includes/functions/functions_general.php on line 52

here's the code insite the function_general.php

// clean up URL before executing it
while (strstr($url, '&&')) $url = str_replace('&&', '&', $url);
while (strstr($url, '&&')) $url = str_replace('&&', '&', $url);
// header locates should not have the & in the address it breaks things
while (strstr($url, '&')) $url = str_replace('&', '&', $url);

header('Location: ' . $url);

zen_exit();

}

error is online 52 which is: header('Location: ' . $url);

now, im quiet new to zencart... has anyone encountered such a bug. my client running on 1.2.6 ,,,
also, is the bug been fixed in the 1.3.0 ?

oh well, i think the problem was in the file /includes/languages/english/checkout_payment_address.php some spaces after closing php. so far, things working. if problems happen again, then u'll see me bumping this thread haha

SysFix:

This error usually occurs if you have an empty line or space after the last line of your code.

You have probably edited a file, and at the end of the code for example..

</php> space
or space

delete up to the very last character.
This solved my problem when this occurred.
This post was a LIFE-SAVER. I was going nuts looking at permissions settings on my cache folder, configure.php settings, you name it -- all because Dreamweaver threw a couple gratuitous spaces at the end of a class file I was tweaking. Nothing like this has happened before, and I've been using DW for years. But when I removed the spaces & replaced the class file, everything was fixed and my heart started beating again.

Thank you! :D

you're welcome. i do understand you when you say your heart is beating again...hahaha. i had to spend 2 hrs today when one of our customers got the error. my boss is happy now too :thumbsup:

Hello,

I am getting a similar message, and it's because I'm trying to install a 3rd party stats calculator called 'CNStats 2'. I'm sure it has something to do with a session cookie already being generated, but have no idea on how to fix this. I would love to see a Zen Cart addon that supports complex stats like referrers and searched keywords, but I have not seen one in any of these forums. Below is a copy of my error.

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /mounted-storage/home6/sub002/sc13289-UCZY/troysbooks/index.php:1) in /mounted-storage/home6/sub002/sc13289-UCZY/troysbooks/includes/functions/sessions.php on line 100

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /mounted-storage/home6/sub002/sc13289-UCZY/troysbooks/index.php:1) in /mounted-storage/home6/sub002/sc13289-UCZY/troysbooks/includes/functions/sessions.php on line 100

Warning: Cannot modify header information - headers already sent by (output started at /mounted-storage/home6/sub002/sc13289-UCZY/troysbooks/index.php:1) in /mounted-storage/home6/sub002/sc13289-UCZY/troysbooks/includes/init_includes/init_templates.php on line 78

I have the code for the stats generator at the top of the main index.php file.

Thanks in advance to anyone in the know about this.

Jobi