Reply To: Save Post Revisions

• John Huebner

• November 15, 2020 at 2:29 am

I have recently found something new that might help those looking to prevent multiple revisions. Please note that I have not tested this and it is just speculation at this time.

This filter in WP is called just before saving a post revision

$post_has_changed = (bool) apply_filters( 'wp_save_post_revision_post_has_changed', $post_has_changed, $last_revision, $post );

So, using this hook you could

add_filter('wp_save_post_revision_post_has_changed', 'my_prevent_post_revisions', 10, 3);
function my_prevent_post_revisions($post_has_changed, $last_revision, $post) {
  // here you can do some checking
  // for example if you only want to prevent revisions on a specific post type
  // return false to prevent post revision

  return $post_has_changed;
}

Then in your filter or function where you want the revision to be saved

// remove the prevent post revision filter
remove_filter('wp_save_post_revision_post_has_changed', 'my_prevent_post_revisions', 10);

// update the post
wp_update_post($args)

// add the filter again
add_filter('wp_save_post_revision_post_has_changed', 'my_prevent_post_revisions', 10, 3);

If anyone has a chance to test this let us know.