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[resolved] cannot modify header warning?? (4 posts)

  1. tracyrosen
    Member
    Posted 5 years ago #

    What is this?

    Warning: Cannot modify header information - headers already sent by (output started at /home/trac7032/public_html/leadingfromtheheart.org/wp-content/themes/scrapbook/functions.php:36) in /home/trac7032/public_html/leadingfromtheheart.org/wp-includes/pluggable.php on line 865

    All of a sudden this morning I get this error each time I make any kind of modification to my blog (add a new post, activate/deactivate plugins).

    For example, I made a new post. Through the writing, as it refreshed, this warning would appear in pink below the content input box. Then I clicked publish and was brought to a page that had only the warning at the top of it, nothing else. But then if I retype in my blog address, the post is posted.

    When I try to deactivate a plugin, I am brought to the warning page. If I renavigate to the plugin page, I see that the plugin is indeed deactivated.

    Is this a 2.8.4 thing?

    It coincided with an All in one SEO plugin update. I deactivated it, but it is still happening.

  2. hedonplay
    Member
    Posted 5 years ago #

    Many people make this mistake when they modified the function.php
    The following article makes a clear explanation.

    http://www.hui-wang.info/2009/07/warning-cannot-modify-header-information-headers-already-sent/

  3. doc4
    Member
    Posted 5 years ago #

    tracyrosen,

    Try this: Open the wp-config.php and remove all spaces before "<?php" and after "?>" Upload and replace. As noted on this site: http://www.hongkiat.com/blog/wordpress-error-warning-cannot-modify-header-information/

  4. tracyrosen
    Member
    Posted 5 years ago #

    Thank you! It was indeed a white space problem and is now fixed.

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