Récupération des en-têtes déjà envoyés par le plugin

Question

Récupération des en-têtes déjà envoyés par le plugin

0

11936 2013-07-05

J'ai unpeu demal avec uneerreur «en-têtes déjàenvoyés» d'unplugin Wordpress quej'avais construitpourmoiet maintenantje m'adapte. Voici l'erreur:

Attention: session_start () [function.session-start]: Impossible d'envoyer la session limiteur de cache -en-têtes déjàenvoyés (sortie démarrée à /home1/uname/directory/domain.com/wp-content/themes/ibm/header.php:2) dans /home1/uname/directory/domain.com/wp-content/plugins/osu-rfm/osu-rfm.php à la ligne 225

J'ai regardé header.php ligne 2et voici ce qu'il y a sansespacesblancs supplémentairesni caractères amusantsetc:

 <!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; - '; }

J'ai regardé la ligne 225 dans osu-rfm.phpet voici ce quifaitpartie de cefichier (c'est lepluginbtw):

 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();
    }
}

Etmaintenant,je suis complètement coincé carje ne saispas quoiessayerensuite ... Quelqu'unpeut-ilfaire des suggestions? J'ai supprimétous lesespacesblancs à lafin et au début detousmesfichiers dethème comme suggéréici ,mais celane semblepasfaire de différence. J'ai égalementessayé de supprimer labalise defermeture ?> à lafin demonfichier deplugin,maisnon.

Aufait,celane seproduit que surmon serveuren direct,pas surma configuration locale,j'ai donc le sentiment que celapourrait être unproblème de serveur.

Merci

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

- Publiez les 10premières lignes de `header.php`
  
  Post the first 10 or so lines of `header.php`
  - 0
  - 2013-07-05
  - s_ha_dum
- Salut @s_ha_dummerci d'avoir répondu - question d'originemise àjour comme demandé
  
  Hi @s_ha_dum thanks for responding - original question updated as requested
  - 0
  - 2013-07-05
  - Osu
- Cefichier _devrait_envoyer une sortie.Cen'estpas leproblème.Activez le débogage ___off___.Avez-voustoujours leproblème?
  
  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
- Voici commentmon débogageest configuré dans `wp-config.php`:` define ('WP_DEBUG',false); `- Je suppose que vous vouliez dire celaplutôt quephp.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
- Quelleest l'URL du siteen ligne?
  
  What is the URL to the live site?
  - 0
  - 2013-07-05
  - s_ha_dum
- http://www.instrumentalbackgroundmusic.comet voici unexemple depage qui affiche l'erreur: 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
- laissez-nous [continuer cette discussion dans le chat] (http://chat.stackexchange.com/rooms/9531/discussion-between-s-ha-dum-and-osu)
  
  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 réponses

votes

s_ha_dum · Accepted Answer · 2013-07-05

2

2013-07-05

Si vous regardez la source de lapage,vous verrez ceci vers la ligne 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>

Quelque choseessaie debien démarrer une session dans le corps de lapage. Vousne pouvezpasfaire ça. Les sessions doivent être lancées avant l'envoi detout contenu aunavigateur.

Le correctifpour ceciest conceptuellement simple - accrocher lafonction session_start à un hook qui s'exécute avant que le contenune soitimprimé. Quelque chose comme ça:

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

Jene saispasexactement ce qui appelle session_start oupourquoi,donc le correctifpratiquepeut êtreplus compliqué,mais c'est le correctif debase.

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.