redirect() problems

yii · November 13, 2009, 4:10am

Hi,

on my testsystem is everything fine working, but on my production system, the redirect() method is nothing doing!!!!

i only get the error "Header alreday sends…"

anybody an idea?

Y11 · November 13, 2009, 4:18am

This happens when output is written before the redirect. So make sure nothing is echoed etc before the redirect.

yii · November 13, 2009, 4:24am

yeah i know,

but i have no echo’s and no print_r before!!!

the strange thing is, that on the test-system (windows 7) everything is ok, only on the production system i have problems (debian)

yii · November 13, 2009, 4:25am

2009/11/13 04:03:41 [error] [php] Cannot modify header information - headers already sent by (output started at /var/www/blog/protected/config/main.php:1) (/var/www/yii/framework/web/CHttpRequest.php:509)

Stack trace:

Y11 · November 13, 2009, 4:35am

I’ve had that before. You php files are messed up (maybe wrong charset or whatever).

Open main.php in your favorite php-editor, copy everything, paste into a new file and save. Upload and try again.

Also check transfer mode of your ftp-app. Maybe it needs a change to binary or something.

yii · November 13, 2009, 4:42am

my whole workspace is in utf-8

I have load the main.php in my editor and encode it to UTF-8 and uploaded it… nothing

my STACK TRACE


 	Cannot modify header information - headers already sent by (output started at /var/www/xyz/protected/config/main.php:1) 

	(/var/www/yii/framework/web/CHttpRequest.php:509) Stack trace: 

	#0 /var/www/blog/protected/controllers/EngineController.php(74): EngineController->redirect() 

	#1 /var/www/yii/framework/web/actions/CInlineAction.php(32): EngineController->actionSearch() 

	#2 /var/www/yii/framework/web/CController.php(300): CInlineAction->run() 

	#3 /var/www/yii/framework/web/CController.php(278): EngineController->runAction() 

	#4 /var/www/yii/framework/web/CController.php(257): EngineController->runActionWithFilters() 

	#5 /var/www/yii/framework/web/CWebApplication.php(310): EngineController->run() 

	#6 /var/www/yii/framework/web/CWebApplication.php(120): CWebApplication->runController() 

	#7 /var/www/yii/framework/base/CApplication.php(135): CWebApplication->processRequest() 

	#8 /var/www/blog/index.php(11): CWebApplication->run() REQUEST_URI=/engine/search.html?value=xyz

edit

if a call directly the URL, than is everything fine working. I have only problems with redirect()


else if ( preg_match( $pattern_alpha, $searchword ) )

{

	$this->redirect(array("engine/phrase", "value" => $searchword));

}

Y11 · November 13, 2009, 4:54am

Some binary data you can’t see in a normal editor is in your main.php. Open the file in hex-editor and you will see. Either it’s utf8 BOM or something else, but you need to get rid of it to get it work correctly.

yii · November 13, 2009, 5:02am

i don’t know where, but yes, there was an invisible character.

what editor are you using, to find so a invisible character?

edit

if i’m uploaded the file on my system, the failure is coming back!

i’m using Filezilla

Y11 · November 13, 2009, 5:09am

Hex-editor? Have none installed, just remembered some month ago I had the same problem. Opened with some shareware hex-editor I found via google and fixed it.

Y11 · November 13, 2009, 6:57pm

I don’t have FileZilla installed, but I guess you have to change the transfer mode (try binary).

yii · November 13, 2009, 10:36pm

I have switch my Workspace from Windows 7 to Linux Ubuntu.

After that I have uploaded the files (under Ubuntu) with filezilla.

And everything works fine

thx @ Y!!

killermonk · November 16, 2009, 7:13am

You could also change your php.ini settings to have output buffering turned on by default. This would have solved the redirect problem.

However, because of that random character (I haven’t run into it on my windows 7 stuff and I’m using utf8 and filezilla) you may have had some interesting display issues even after the output buffer configuration was changed.

In general, though, I find it a good idea to turn output buffering on by default in the php.ini file. That’s just me, though.

Mirco · December 28, 2009, 11:16am

You can remove the UTF-8 BOM from the output using the ob_start function. This way you can leave the UTF-8 BOM in your source files so your editor understands it is really UTF-8.

In the /protected/config/main.php you have to add before returning the config array:




ob_start('My_OB');

function My_OB($str, $flags)

{

    //remove UTF-8 BOM

    $str = preg_replace("/\xef\xbb\xbf/","",$str);

    

    return $str;

}

return array( ... yii config array ...);

P.S. You don’t have to call ob_end_flush(), php will do this automatically at the end of the script.

Dave · December 28, 2009, 12:25pm

You might have a whitespace after the closing php tag ?> in your main.php

thim · December 31, 2010, 12:29pm

Mirco:

You can remove the UTF-8 BOM from the output using the ob_start function. This way you can leave the UTF-8 BOM in your source files so your editor understands it is really UTF-8.

In the /protected/config/main.php you have to add before returning the config array:
ob_start('My_OB');

function My_OB($str, $flags)

{

    //remove UTF-8 BOM

    $str = preg_replace("/\xef\xbb\xbf/","",$str);

    

    return $str;

}

return array( ... yii config array ...);
P.S. You don’t have to call ob_end_flush(), php will do this automatically at the end of the script.

This solution worked for me.

Is this a good solution or could this cause for problems?

Does this mean I have an UTF-8 BOM? Is there a terminal batch script to verify this? Or within the IDE (I’m using Dreamweaver CS 5 for Mac)

orestis · April 7, 2011, 6:22pm

Hey

I had the same problem with you. When I started writing a new file, it’s encoding was ASCII adn when I changed it to UNICODE I had this kind of problem. I am using Notepad++ and it has an option under “Encoding” which says “UTF-8 without BOM”. I used to just choose encode in “UTF-8” and not UTF-8 without BOM" and that’s why I had this problem. BOM adds three bytes in front of the file which are not recognized as encoding characters but as true output.

I don’t know how you can change your file encoding through other editors but Notepad++ is quite helpful in that!

This is the link about BOM.

Haensel · July 15, 2011, 3:05pm

Just had the same issue, but my problem were 2 whitespaces right after the php closing tag in one of my model files. So if you get this error search for anything outside your php tags

quantico · October 27, 2011, 8:22pm

thanks. yes is the format of the file utf8 or ansi, etc. you can not change it just in a few files. you have to be consistent. use geany in linux or notepad ++ in windows.

cactork · November 26, 2011, 1:29pm

Hi there,

I ran into the same issue but in my case everything was in UTF.

The problem was in one CController, it had two spaces into the beginning of the controller.

Attaching a shot to illustrate.

MichaelG · June 22, 2012, 4:27am

This led to my solution… Dave, you rock!

I enabled logging of errors and tried to reload the offending page.

protected/config/main.php

…

array(‘class’=>‘CWebLogRoute’,), // to enable debugging

This told me which file to look at…

I then opened that file, deleted lines after closing ?> tag and my problem (Captcha was failing to generate) went away!

Buys Dave virtual beer!