Redirect all attachment pages to frontpage

With this code, all attachment pages redirects to the frontpage. This is particularly helpful if you want to keep things tidy, or haven’t styled the attachment pages accordingly.

function myprefix_redirect_attachment_page() {
  if ( is_attachment() ) {
    global $post;
      if ( $post && $post->post_parent ) {
          wp_redirect( esc_url( get_permalink( $post->post_parent ) ), 301 );
          exit;
        } else {
          wp_redirect( esc_url( home_url( '/' ) ), 301 );
          exit;
          }
        }
  }
add_action( 'template_redirect', 'myprefix_redirect_attachment_page' );