wp-includes/pluggable.php on line 899.

Cannot modify header information- headers alredy sent by

Please see:

https://codex.www.ads-software.com/FAQ_Troubleshooting#How_do_I_solve_the_Headers_already_sent_warning_problem.3F

thank you! ??

but i did not find the solution for my problem.

I have a message: Warning: Cannot modify header information – headers already sent by (output started at /xxx/wp-includes/functions.php:3060) in /xxx/pluggable.php on line 899.

functions.php on line 3060:
trigger_error( sprintf( __( '%1$s was called <strong>incorrectly</strong>. %2$s %3$s' ), $function, $message, $version ) );

pluggable.php on line 899:
header("Location: $location", true, $status);

Seriously, I don’t know solve this error. I cannot find space, new line etc. But maybe I am blind.

Please help me!

Thx,
Cavey85

The error is at line 8 of /wp-includes/functions.php, which is affecting pluggable.php

Using FTP or your host provided file management tool (I suggest a full backup of site at this point first), rename /wp-includes/functions.php to /wp-includes/functions.php.old

Next, upload this file from a fresh download of the version of WordPress in use. If you are unsure check yoursite.com/readme.html.

This error is triggered when there’s a problem with one of the plugins that you’re using. You need to do the standard de-bugging of deactivating ALL plugins, and then re-activate them one-by-one until you find out which one of the plugins is causing this.

Dear Pioneer Valley Web Design Member,

I copied the new functions.php into the root. But it did not work.
My wordpress is 3.7.1.
Is there next step?

thx

I copied the new functions.php into the root

First, there is no functions.php in the ‘root’. Remove that file (from root). Files must be placed in their proper locations.

Yes. Three steps. FTP or host file management tool access will be required. Once you can access your site files, I suggest a full backup first.

Each one of these steps are part of troubleshooting.

1. Rename the whole plugins folder to plugins.old
2. Rename all theme folders (not the whole folder) to theme_folder_name.old. Ensure a default unedited theme is in place at this time (upload one).
3. Perform a Manual Update.
4. Rename .htaccess to old.htacccess.
5. Verify that wp-config.php is clean (recreate if needed).

Since we are not positive of the issue, this restores the site to a default setup and should allow access back to site. This also will rule out a server issue (or at least if it is you can report to host that WP is at default).

Test site. Can you login and perform basic wp functions?

Note: ensure you clear your local browser cache.