Feedzy filter to add nofollow to links

gistfile1.txt

function tifdtwo_feedzy_remove_link_matches( $matches ) {
	return '<a href="' . $matches[1] .'" rel="nofollow">' . $matches[2]. '</a>';
}
function tifdtwo_feedzy_remove_link( $content, $feedURL ) {
    // old, bad pattern
    // $pattern= '/<a.*href=\"(https?:\/\/.*)\".*>(.*)<\/a>/iU';
    $pattern= '/<a\s+href\s*=\s*"([^"]+)"[^>]*>([^<]+)<\/a>/iU';
    
    
    $content= preg_replace_callback( $pattern, 'tifdtwo_feedzy_remove_link_matches', $content );
    return $content;
}