sortable - need more examples

sortable - need more examples

page: https://api.jqueryui.com/sortable/

Sortable need more examples, better examples.
Typical, you need move items and send all ids to server. I not found good example. Not full example. Not for methods.
Good example i found on https://codepen.io/Sinetheta/pen/qvbCr
Code:
  1. HTML
    <ul id="image-list1" class="sortable-list">
      <li id="a">A</li>
      <li id="b">B</li>
      <li id="c">C</li>
    </ul>

    <ul id="image-list2" class="sortable-list">
      <li id="1">1</li>
      <li id="2">2</li>
      <li id="3">3</li>
    </ul>
  2. JS:
    $('.sortable-list').sortable({
      connectWith: '.sortable-list',
      update: function(event, ui) {
        var changedList = this.id;
        var order = $(this).sortable('toArray');
        var positions = order.join(';');
    alert(order)
        alert({
          id: changedList,
          positions: positions
        }.toSource());
      }
    });
I now know, how toArray works, where get 'id' attribute (what element use).

I trying find 3 days something as this
  1. foto2.sortStart = function(event, ui) {
            ui.item.pos = {};
            ui.item.pos.start = ui.item.index();
        }
    foto2.sortStop = function( event, ui )
         {
        var order;
            ui.item.pos.end  = ui.item.index();
        if (ui.item.pos.start!=ui.item.pos.end)
            {
            order = $(this).sortable( "toArray", {attribute: "sort_id"});
    alert(order)
    //  $.post("update_displayorder.php?"+order+"&a=hello"+"&b=developer",{abc:a,xyz:b},function(theResponse){
    //  $("#categorysavemessage").html(theResponse);

            }
        }
     ----
    <script src="./js/jquery-ui-1.10.4.custom.min.js"></script>
    <script>
        $('.handles123').sortable({
            tolerance: "pointer",
            handle: '.glyphicon-move',
            start: foto2.sortStart,
            stop: foto2.sortStop
            });

    </script>