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Modify WordPress auto-generated robots.txt without plugin

WordPress generates automatically its own robots.txt and the best way to add your own rules in it, is to use the robots_txt filter.

Instead of using plugins or manually creating your robots.txt file, you can use WordPress robots_txt filter to modify the auto-generated robots.txt and add your rules.

Edit your theme (or child theme) functions.php and add the following snippet:

function add_to_robotstxt($output, $public) {
    $my_rules = "
# Added by robots_txt filter in functions
# Add your rules below, e.g.: 
Disallow: /wp-content/themes/
    return $output . $my_rules;

add_filter('robots_txt', 'add_to_robotstxt');

That’s it. That’s the preferred way to do it, since you don’t want a whole plugin just for a few lines of code and you don’t really want to create your own robots.txt file and miss any of the rules added by WordPress 😉

Divi WordPress Theme Monarch Social Sharing Plugin


Post a comment
  1. Mmal75
    Posted on January 29, 2023 at 05:56 Permalink

    Good post. You helped me 🙂

    • Mmal75
      Posted on January 29, 2023 at 06:06 Permalink

      Should it be UTF8?

  2. Surojit Dutta
    Posted on March 16, 2020 at 18:26 Permalink

    Very Good And Informative Post For All Webmaster. Here is a similar post About Robots.txt you can check here


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