eZ Publish 4 : copy an object and put it in a new node

gistfile1.php

function copyObjectToNewLocation($object, $newParentNodeId) {
       $db = eZDB::instance();
       $db->begin();
       $newObject = $object->copy(false);
       $newObject->setAttribute( 'section_id', 0 );
       $newObject->store();
       $curVersion        = $newObject->attribute( 'current_version' );
       $curVersionObject  = $newObject->attribute( 'current' );
       $newObjAssignments = $curVersionObject->attribute( 'node_assignments' );
       unset( $curVersionObject );
       foreach( $newObjAssignments as $assignment )
       {
           $assignment->purge();
       }
       $nodeAssignment = eZNodeAssignment::create( array(
           'contentobject_id' => $newObject->attribute( 'id' ),
           'contentobject_version' => $curVersion,
           'parent_node' => $newParentNodeId,
           'is_main' => 1
       ) );
       eZOperationHandler::execute( 'content', 'publish', array( 'object_id' => $newObject->attribute( 'id' ),
           'version'   => $curVersion ) );
       // Update "is_invisible" attribute for the newly created node.
       $newNode = $newObject->attribute( 'main_node' );
       eZContentObjectTreeNode::updateNodeVisibility( $newNode, $newParentNode );

       $db->commit();

        return $newObject;

   }