1,        'name' => "语文",        'listorder' => 2    ),    array(        'id' => 2,        'name' => "数学",        'listorder' => 4    ),    array(        'id' => 3,        'name' => "英语",        'listorder' => 1,        'sun' => array(            array(                'id' => 6,                'name' => "生物",                'listorder' => 7            ),        )    ),    array(        'id' => 4,        'name' => "生物",        'listorder' => 7    ),    array(        'id' => 5,        'name' => "化学",        'listorder' => 0    ),    array(        'id' => 7,        'name' => "英语",        'listorder' => 1,        'sun' => array(            array(                'id' => 8,                'name' => "生物",                'listorder' => 7            ),        )    ),);$sort = array(          'direction' => 'SORT_DESC', //排序顺序标志 SORT_DESC 降序；SORT_ASC 升序          'field'     => 'listorder', //排序字段  );  $arrSort = array();  foreach($array AS $uniqid => $row){      foreach($row AS $key=>$value){          $arrSort[$key][$uniqid] = $value;      }  }  if($sort['direction']){      array_multisort($arrSort[$sort['field']], constant($sort['direction']), $array );  }    print_r($array );