PHP 二维数组某个字段进行排序

 /**
     * @param $arrUsers
     * @return mixed
     *二维数组某个字段进行排序
     */

    function quick_sort($arrUsers)
    {
        $sort = array(
              'direction' => 'SORT_DESC', //排序顺序标志 SORT_DESC 降序；SORT_ASC 升序
              'field'     => 'share_num',       //排序字段
        );
        $arrSort = array();
        foreach($arrUsers AS $k => $v){
              foreach($v AS $key=>$value){
                      $arrSort[$key][$k] = $value;
            }
        }
        if($sort['direction']){
            array_multisort($arrSort[$sort['field']], constant($sort['direction']), $arrUsers);
        }      

         return $arrUsers;

    }