Hey, great extension, thank you very much!
Arne Bakkebø is right with extended_sort I think, but I like this one =)

Maybe you are interested to add my little extension to yours to sort by price:

               case 'sort_key':


                   $objectA = self::getObjectAttributeSortKey( $objectA, $attributeName );


                   $objectB = self::getObjectAttributeSortKey( $objectB, $attributeName );


 

                   $objectAAttributeValue = '';


                   $objectBAttributeValue = '';


 

                     // if price is gt... (sort_key_int)


                   if ( $objectA > $objectB ) {


                       // Making ObjectA to be less than ObjectB


                       // Jumping to comparing function


                          $objectAAttributeValue = 'a';


                       $objectBAttributeValue = 'b';


                   } else {


                          $objectAAttributeValue = 'b';


                       $objectBAttributeValue = 'a';


                     }


                   break;


 

   public static function getObjectAttributeSortKey( $object, $attributeName ) {


       $attribute = self::getObjectAttribute( $object, $attributeName );


 

       //sort_key_int sometimes has a difference from 1, maybe a bug...


       //return $attribute->SortKeyInt;


         $Price = sprintf ( '%01.2f', $attribute->DataFloat );


         $PriceInt = (int) str_replace(',','',str_replace('.','',str_replace(' ','',$Price)));  

 

       return $PriceInt;


   }


 

{def $sorted_children = get_sorted_objects( $children_arr, array(


   array(


       false(),


       array( 'sort_key', 'price' )


   )


))}


 

best regards
scrieler