How to set all external links to a certain domain to “nofollow”?
Assuming you are targetting links in post content, I’d say something like that : add_filter( ‘the_content’, ‘wpse_254317_nofollow’ ); /** * Add rel nofollow according to a predefined domain * to links in content * @param $content * @link http://stackoverflow.com/a/4809181/1930236 * @return mixed */ function wpse_254317_nofollow( $content ) { $my_folder = “https://google.com”; preg_match_all( ‘~<a.*>~isU’, $content, $matches … Read more