Ditto parent parent

<?php
/* hierarchy_based_chunk
 
[!hierarchy_based_chunk?
    &ids_chunks=`2|hbc_1 , 21|hbc_2`
    &def_chunk=`hbc_def`
!]
 
the above snippet call in a template produces:
hbc_1 chunk on doc 2 and all children/grandchildren
hbc_2 chunk on doc 21 and all its children/grandchildren
hbc_def chunk on all other documents
 
*/
 
//$xstart = $modx->getMicroTime();
 
// set default parent id | chunk name
// ex:  $default_ids_chunks = array( '2|hbc_1' , '21|hbc_2' );
$default_ids_chunks = array();
 
// set an overall default chunk name
$default_chunk = isset( $def_chunk ) ? $def_chunk : '';
 
 
$output ='';
$print_chunk ='';
 
$parts = $ids_chunks !='' ? explode( ',', $ids_chunks ) : $default_ids_chunks;
 
if( !empty( $parts ) ){
 
    $uparent = $modx->runSnippet( 'UltimateParent' );
 
    $check_array = array( $modx->documentObject['id'], $uparent );
 
    foreach( $parts as $k => $v ){
     
        $xplod = explode( '|', $v );
         
        // id
        $x = trim( $xplod[0] );
         
        // chunk name
        $y = trim( $xplod[1] );
         
        if( in_array( intval( $x ), $check_array ) && $print_chunk =='' ){
 
            $print_chunk = $y;
 
        }
    }
}
 
// if $print_chunk is empty set to overall default
if( $print_chunk =='' ){
 
    $print_chunk = $default_chunk;
 
}
 
// set up the ditto snippet params
$ditto_params = array(
    'parents'                  => '5',
    'total'                    => '99',
    'showPublishedOnly'        => '1',
    'orderBy'                  => 'menuindex ASC',
    'tpl'                      => $modx->getChunk( $print_chunk ),
);
 
// process the ditto snippet
$output .= $modx->runSnippet( 'Ditto', $ditto_params );

//$xend = $modx->getMicroTime();
//$output .='<p>'.( str_replace( '-', '', sprintf( "%2.4f s", $xstart - $xend ) ) ).'</p>';
 
return $output;
?>