Warning: Cannot modify header information

8 posts by 3 authors in: Forums > CMS Builder
Last Post: November 8, 2012   (RSS)

By ThreeTree - May 25, 2012 - edited: May 26, 2012

Haven't worked with CMS Builder for some time. Attempting to set up test page incorporating CMS in existing site. Getting this message: Warning: Cannot modify header information - headers already sent by (output started at /home/content/18/8537518/html/test_index2.php:3) in /home/content/18/8537518/html/test_index2.php on line 3

Obviously I've inserted the generated code above the <head> incorrectly but can't correct it.

Figured it out and have the info above head correct. But error messages indicate that I need to remove closing / from a number of commands.

Re: [ThreeTree] Warning: Cannot modify header information

By Dave - May 26, 2012

Hi ThreeTree,

Make sure you don't have any spaces, enters, or HTML before the first <?php block that load the viewer_functions.php library.

Let me know if that works for you.
Dave Edis - Senior Developer
interactivetools.com

Re: [Dave] Warning: Cannot modify header information

By jacgo - November 8, 2012

Hi Dave

I got same problem.

the error message is :
Warning[/#666666]: Cannot modify header information - headers already sent by (output started at /home/quanmax/public_html/about_index.php:1) in /home/quanmax/public_html/about_index.php on line 1

The header code in my page is :[/#666666]

<?php header('Content-type: text/html; charset=utf-8'); ?>
<?php


// load viewer library
$libraryPath = 'cmsAdmin/lib/viewer_functions.php';
$dirsToCheck = array('/home/quanmax/public_html/','','../','../../','../../../');
foreach ($dirsToCheck as $dir) { if (@include_once("$dir$libraryPath")) { break; }}
if (!function_exists('getRecords')) { die("Couldn't load viewer library, check filepath in sourcecode."); }

// load record from 'about_index'
list($about_indexRecords, $about_indexMetaData) = getRecords(array(
'tableName' => 'about_index',
'where' => '', // load first record
'loadUploads' => true,
'allowSearch' => false,
'limit' => '1',
));
$about_indexRecord = @$about_indexRecords[0]; // get first record
if (!$about_indexRecord) { dieWith404("Record not found!"); } // show error message if no record found

?>



I can not find the errors.

Jac

Re: [jacgo] Warning: Cannot modify header information

By Dave - November 8, 2012

Hi Jacgo,

Make sure you don't have any spaces or enters before this line:
(check here)<?php header('Content-type: text/html; charset=utf-8'); ?>
<?php

And if you still get the error, remove the code in red:
<?php header('Content-type: text/html; charset=utf-8'); ?>
<?php

Let me know if that works for you. Thanks!
Dave Edis - Senior Developer
interactivetools.com

Re: [Dave] Warning: Cannot modify header information

By jacgo - November 8, 2012

Hi Dave

Thanks for the quick reply!

There is no space before the code
<?php header('Content-type: text/html; charset=utf-8'); ?>
<?php

and removed the ?>
<?php [/#ff0000]

still got error.

Here is my head code:

<?php header('Content-type: text/html; charset=utf-8');


// load viewer library
$libraryPath = 'cmsAdmin/lib/viewer_functions.php';
$dirsToCheck = array('/home/quanmax/public_html/','','../','../../','../../../');
foreach ($dirsToCheck as $dir) { if (@include_once("$dir$libraryPath")) { break; }}
if (!function_exists('getRecords')) { die("Couldn't load viewer library, check filepath in sourcecode."); }

// load record from 'about_index'
list($about_indexRecords, $about_indexMetaData) = getRecords(array(
'tableName' => 'about_index',
'where' => '', // load first record
'loadUploads' => true,
'allowSearch' => false,
'limit' => '1',
));
$about_indexRecord = @$about_indexRecords[0]; // get first record
if (!$about_indexRecord) { dieWith404("Record not found!"); } // show error message if no record found

?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3c.org/TR/1999/REC-html401-19991224/loose.dtd">
<!-- saved from url=(0040)Annual Report.html -->
<HTML xmlns="http://www.w3.org/1999/xhtml">
<HEAD>
<TITLE>Quanmax Inc. - Investor Relations - Annual Report</TITLE>
<META content="text/html; charset=utf-8" http-equiv=Content-Type>
<LINK
rel=stylesheet type=text/css href="css/web_css.css">
<LINK
rel=stylesheet type=text/css href="css/layer_css.css">
<SCRIPT type=text/javascript src="script/headercode.js"></SCRIPT>
<SCRIPT type=text/javascript
src="script/AC_RunActiveContent.js"></SCRIPT>
<META name=GENERATOR content="MSHTML 8.00.6001.19328">
</HEAD>

I thought it is Dreamweaver problem. but I do the work many times. It is the error I met in first time.

Hope you can help.

Thanks!

Jac







Re: [jacgo] Warning: Cannot modify header information

By Dave - November 8, 2012

Hi jacgo,

Try removing this line:
<?php header('Content-type: text/html; charset=utf-8'); ?>

If that doesn't work, can you attach the file to the post? I can take a look for you but I need to see the file directly to catch any stray spaces or things like that that might be causing the issue.

Thanks.
Dave Edis - Senior Developer
interactivetools.com

Re: [Dave] Warning: Cannot modify header information

By jacgo - November 8, 2012

Hi Dave

Great!
After removed the first line.
[font "Verdana"]<?php header('Content-type: text/html; charset=utf-8'); ?>[/#000000]

All code fine now.
Feedback:
before removing the first line.
Some of our CSS effect can not display properly.
after it. All the css can be displayed properly.

Do know why.
Do I need to remove all the code from cmsAdmin?

Thanks for help.

Jacgo.