How to add a meta information to the URL?

Just got a solution: Just add this code to your functions.php and replace ‘_metainfo’ by your meta information and ‘posttype’ by your posttype.

function add_meta2url( $link, $post ) {
  $post_meta = get_post_meta( $post->ID, '_metainfo', true );
      if ( 'posttype' == get_post_type( $post ) ) {
        $link = $link . '#' .$post_meta;
        return $link;
     }
}
add_filter( 'post_type_link', 'add_meta2url', 1, 2 );

Unfortunately, the ‘#’ cannot be replaced by any other special character like ‘-‘, otherwise the url is responding with a 404 error message.