php数组键值排序

 代码片段如下：        $data = $villageDb->alias('a')->join('br_esf_village_expand as b on a.villageId=b.villageId', 'LEFT')->where($where)->limit($Page->firstRow . ',' . $Page->listRows)->select();        $houseDb=D("House");        foreach($data as $key => $val){            $quyuname = '';            if ($val['fangAreaId']) {                $quyuname = $areaDb->getAreaName($val['fangAreaId']);            }            $shangquanname = '';            if ($val['fangTradingId']) {                $shangquanname = $areaDb->getShangName($val['fangTradingId']);            }            $data[$key]['quyuname'] = $quyuname;            $data[$key]['shangquanname'] = $shangquanname;            $data[$key]['ispublish']=$houseDb->ishouseCount($val['villageId']);            $data[$key]['nopublish']=$houseDb->nohouseCount($val['villageId']);        }        $d=$this->multi_array_sort($data, 'ispublish'); //键值ispublish排序                    $this->changename($fangareaId); //传值            $this->assign('quyu', $quyu)    //得到区域                          ->assign('sqData', $this->changename($fangareaId))    //搜索赋值商圈                ->assign('data', $d); // 得到商圈            $this->display();     }    //二维数组键值排序    function multi_array_sort($multi_array, $sort_key, $sort = SORT_DESC) {            if (is_array($multi_array)) {                 foreach ($multi_array as $row_array) {                 if (is_array($row_array)) {                 $key_array[] = $row_array[$sort_key];                 } else {                    return FALSE;                 }                }                } else {                return FALSE;                }                array_multisort($key_array, $sort, $multi_array);                return $multi_array;                }