Obtendo cabeçalhos já enviados erro de plugin

Question

Obtendo cabeçalhos já enviados erro de plugin

0

11936 2013-07-05

Estoutendo umpouco deproblemas com umerro de 'cabeçalhosjáenviados' de umplugin WordPresseu construíparamim e agoraestou se adaptando. Este é oerro:

.
Aviso: session_start () [function.session-start]: Não épossívelenviar a sessão Cache Limiter - cabeçalhosjáenviados (saídainiciadaem /home1/uname/directory/domain.com/wp-content/themes/ibm/header.php:2) no /home1/uname/directory/domain.com/wp-content/plugins/osu-rfm/osu-rfm.php. na linha 225

Eujá olheipara o header.php linha 2e éisso que há comespaçosbrancosextrasnem caracteresengraçados,etc:

 <!DOCTYPE html>
<!--[if lt IE 7 ]> <html class="ie ie6 no-js" <?php language_attributes(); ?>> <![endif]-->
<!--[if IE 7 ]>    <html class="ie ie7 no-js" <?php language_attributes(); ?>> <![endif]-->
<!--[if IE 8 ]>    <html class="ie ie8 no-js" <?php language_attributes(); ?>> <![endif]-->
<!--[if IE 9 ]>    <html class="ie ie9 no-js" <?php language_attributes(); ?>> <![endif]-->
<!--[if gt IE 9]><!--><html class="no-js" <?php language_attributes(); ?>><!--<![endif]-->
<!-- the "no-js" class is for Modernizr. -->

<head id="osu-rfm" data-template-set="html5-reset-wordpress-theme" profile="http://gmpg.org/xfn/11">

    <title>
           <?php
              if (function_exists('is_tag') && is_tag()) {
                 single_tag_title("Tag Archive for &quot;"); echo '&quot; - '; }

Eujá olheipara a linha 225em osu-rfm.phpe éisso quefazparte desse arquivo (este é oplugin BTW):

 public static function enable_sessions()
{
    if( is_post_type_archive( "ibmdirectory" ) || "ibmdirectory" == get_post_type() )
    {
        if( ! isset( $_SESSION ) )
    /*
    if(headers_sent($filename, $linenum)) {
        //if headers already sent out print some message.
        echo "Headers already sent in $filename on line $linenum\n";
    } else {
        //if headers not already sent
        echo "New headers";
    }
    */
        session_start();
    }
}

E agoraestou completamentepreso comonão sei o quetentar opróximo ... Alguémpodefazer algumas sugestões? Eu removitodo oespaçobranconofinale apartir detodos osmeus arquivostemáticos como sugerido aqui ,Masparecenãofazer a diferença. Eutambémtentei remover ofechamento ?>tagnofinal do arquivo domeuplugin,masnada.

Bythe way,isso só acontecenomeu servidor ao vivo,nãomeu local configurado,entãoeutenho a sensação de quepoderia ser umproblema de servidor.

obrigado

Osu

I'm having a bit of trouble with a 'headers already sent' error from a Wordpress plugin I had built for me and now I'm adapting. This is the error:

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home1/uname/directory/domain.com/wp-content/themes/ibm/header.php:2) in /home1/uname/directory/domain.com/wp-content/plugins/osu-rfm/osu-rfm.php on line 225

I've looked at header.php line 2 and this is what is there with no extra white spaces nor funny characters etc:

<!DOCTYPE html>
<!--[if lt IE 7 ]> <html class="ie ie6 no-js" <?php language_attributes(); ?>> <![endif]-->
<!--[if IE 7 ]>    <html class="ie ie7 no-js" <?php language_attributes(); ?>> <![endif]-->
<!--[if IE 8 ]>    <html class="ie ie8 no-js" <?php language_attributes(); ?>> <![endif]-->
<!--[if IE 9 ]>    <html class="ie ie9 no-js" <?php language_attributes(); ?>> <![endif]-->
<!--[if gt IE 9]><!--><html class="no-js" <?php language_attributes(); ?>><!--<![endif]-->
<!-- the "no-js" class is for Modernizr. -->

<head id="osu-rfm" data-template-set="html5-reset-wordpress-theme" profile="http://gmpg.org/xfn/11">

    <title>
           <?php
              if (function_exists('is_tag') && is_tag()) {
                 single_tag_title("Tag Archive for &quot;"); echo '&quot; - '; }

I've looked at line 225 in osu-rfm.php and this is what is part of that file (this is the plugin btw):

public static function enable_sessions()
{
    if( is_post_type_archive( "ibmdirectory" ) || "ibmdirectory" == get_post_type() )
    {
        if( ! isset( $_SESSION ) )
    /*
    if(headers_sent($filename, $linenum)) {
        //if headers already sent out print some message.
        echo "Headers already sent in $filename on line $linenum\n";
    } else {
        //if headers not already sent
        echo "New headers";
    }
    */
        session_start();
    }
}

And now I'm completely stuck as I don't know what to try next...can anyone make some suggestions? I removed all white space at the end and beginning in all my theme files as suggested here, but it doesn't seem to make a difference. I've also tried removing the closing ?> tag at the end of my plugin file, but nada.

By the way, this only happens on my live server, not my local set up, so I have the feeling it could be a server issue.

Thanks

Osu

fonte
Osu

- Postar asprimeiras 10 oumais linhas de `header.php`
  
  Post the first 10 or so lines of `header.php`
  - 0
  - 2013-07-05
  - s_ha_dum
- Oi @s_ha_dum Obrigadopor responder -pergunta original atualizada conforme solicitado
  
  Hi @s_ha_dum thanks for responding - original question updated as requested
  - 0
  - 2013-07-05
  - Osu
- Esse arquivo _should_estarenviando saída.Essenão é oproblema.Ativar depuração ___off___.Você aindatem oproblema?
  
  That file _should_ be sending output. That is not the problem. Turn debugging ___off___. Do you still have the problem?
  - 0
  - 2013-07-05
  - s_ha_dum
- É assim queminha depuraçãoestá configuradaem `wp-config.php`:` definir ('wp_debug',false); `- Eu suponho que você quis dizer queem vez dephp.ini?
  
  This is how my debugging is set up in `wp-config.php` : `define('WP_DEBUG', false);` - I assume you meant that rather than php.ini?
  - 0
  - 2013-07-05
  - Osu
- Qual é o URLpara o site ao vivo?
  
  What is the URL to the live site?
  - 0
  - 2013-07-05
  - s_ha_dum
- http://www.instrumentalbackgroundmusic.come este é umexemplo de umapágina quemostra oerro: http://www.instrumentalbackgroundmusic.com/royalty-free-music/test-track-jazz-indie/
  
  http://www.instrumentalbackgroundmusic.com and this is an example of a page that shows the error: http://www.instrumentalbackgroundmusic.com/royalty-free-music/test-track-jazz-indie/
  - 0
  - 2013-07-05
  - Osu
- Vamos [continuaresta discussãono chat] (http://chat.stackexchange.com/rooms/9531/Discussion-between-su)
  
  let us [continue this discussion in chat](http://chat.stackexchange.com/rooms/9531/discussion-between-s-ha-dum-and-osu)
  - 0
  - 2013-07-05
  - s_ha_dum

1 responda

votos

s_ha_dum · Accepted Answer · 2013-07-05

2

2013-07-05

Se você olharpara afonte dapágina,você veráissoem torno da linha 122:

 <div class="nav-collapse collapse">
                    <br />
<b>Warning</b>:  session_start() [<a href='function.session-start'>function.session-start</a>]: Cannot send session cookie - headers already sent by (output started at /home1/onesizeu/clients/instrumentalbackgroundmusic.com/wp-includes/functions.php:2841) in <b>/home1/onesizeu/clients/instrumentalbackgroundmusic.com/wp-content/plugins/osu-royaltfreemusic/osu-royaltyfreemusic.php</b> on line <b>225</b><br />
<br />
<b>Warning</b>:  session_start() [<a href='function.session-start'>function.session-start</a>]: Cannot send session cache limiter - headers already sent (output started at /home1/onesizeu/clients/instrumentalbackgroundmusic.com/wp-includes/functions.php:2841) in <b>/home1/onesizeu/clients/instrumentalbackgroundmusic.com/wp-content/plugins/osu-royaltfreemusic/osu-royaltyfreemusic.php</b> on line <b>225</b><br />
<ul id="menu-primary" class="nav"><li id="menu-item-9" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-9"><a href="http://www.instrumentalbackgroundmusic.com/">Home</a></li>

Algoestátentandoiniciar uma sessãobem no corpo dapágina. Vocênãopodefazerisso. As sessõesprecisam seriniciadas antes que qualquer conteúdo sejaenviadopara onavegador.

A correçãoparaisso é conceitualmente simples -gancho o session_startfunçãopara algumgancho que éexecutado antes que o conteúdo sejaimpresso. Algo assim:

 function boot_session() {
  session_start();
}
add_action('wp_loaded','boot_session');

Eunão sei o queexatamente,é chamar session_start oupor que,portanto,a correçãopráticapode sermais complicada,masessa é a correçãobásica.

If you look at the source of the page you will see this around line 122:

<div class="nav-collapse collapse">
                    <br />
<b>Warning</b>:  session_start() [<a href='function.session-start'>function.session-start</a>]: Cannot send session cookie - headers already sent by (output started at /home1/onesizeu/clients/instrumentalbackgroundmusic.com/wp-includes/functions.php:2841) in <b>/home1/onesizeu/clients/instrumentalbackgroundmusic.com/wp-content/plugins/osu-royaltfreemusic/osu-royaltyfreemusic.php</b> on line <b>225</b><br />
<br />
<b>Warning</b>:  session_start() [<a href='function.session-start'>function.session-start</a>]: Cannot send session cache limiter - headers already sent (output started at /home1/onesizeu/clients/instrumentalbackgroundmusic.com/wp-includes/functions.php:2841) in <b>/home1/onesizeu/clients/instrumentalbackgroundmusic.com/wp-content/plugins/osu-royaltfreemusic/osu-royaltyfreemusic.php</b> on line <b>225</b><br />
<ul id="menu-primary" class="nav"><li id="menu-item-9" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-9"><a href="http://www.instrumentalbackgroundmusic.com/">Home</a></li>

Something is trying to start a session well into the body of the page. You can't do that. Sessions need to be started before any content is sent to the browser.

The fix for this is conceptually simple-- hook the session_start function to some hook that runs before content is printed. Something like this:

function boot_session() {
  session_start();
}
add_action('wp_loaded','boot_session');

I don't know what, exactly, is calling session_start or why, so the practical fix may be more complicated but that is the basic fix.