How to remove rel links in WordPress?

Question

WordPress

Good afternoon! When adding images in the wordpress page editor marked as a link to an image, the attribute rel="attachment wp-att-$$$" is written in the link itself. Is it possible to somehow automatically remove this attribute from all links? And why does WordPress insert these attributes?) Thank you.

Answer 1

Something I don't see the automatic insertion of relation - screenshotuploader.com/s/1602fpe_c (WP v.4.3.3), there is a field in the editor, but for manual insertion. And so the relation is used for dynamic link management and this does not affect the front-end in any way. But if you really need it, then use a filter in the topic, for example, this one:

add_filter('image_send_to_editor', 'my_theme_remove_rel', 10, 2);
function my_theme_remove_rel($html, $id) {
    if($id>0)
        $html=str_replace('rel="attachment wp-att-'.$id.'"','',$html);

    return $html;   
}