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    • Unwanted blank lines before tag

    • IT Nursery
    • May 20, 2022
    • 0

    I’ve a strange problem with an Autofocus theme.

    In my templates file, header.php, I’ve a code like this (and is correct)

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

    When I look at the source code of the generated HTML, I found something like this

    [blank]
[blank]
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

    The extra blank lines are breaking my RSS feeds…

    Other info:

    • No filters on the content except wpautop
    • functions.php doesn’t do anything on the content
    • Plugins All In One Seo, WP Stats, Smiley Remover, SEO Friendly images

    Any clues?

    2 Answers
    2

    the_content doesn’t affect the DOCTYPE and <html> tags, only the post/page content.

    One of your plugins, or something else in the theme is either throwing an error, or is printing something earlier than it should.

    Have you tried:

    • Disabling each plugin one by one and see when it is fixed.
    • Editing wp-config.php and adding define( 'WP_DEBUG', true ); to look for errors
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