ThinkPHP框架如何將遞歸獲取的無限級分類子分類數據轉化為多維數組？

function getchildarea($id){     if(!$id){         return;     }     static $area;     $area = $area ?? new appcommonmodelarea;     $result = collection($area->where(['pid' => $id])->order('id desc')->select())->toarray();     static $res = [];     if($result){         foreach ($result as $key => $val) {             $val['children'] = getchildarea($val['id']);              $res[] = $val;         }     }     return $res; }

<?php /**  * 方法 deal_list_to_tree2，一維數組根據$parent_id的值轉為多維數組  *  * @param array $data 待處理的一維數組  * @param string $pkname 用于轉化為多維數組的主鍵字段  * @param string $pidname 用于轉化為多維數組的字段（根據該字段值轉換）  * @param string $childname 子級的字段名  * @param bool $is_empty_childrens 是否返回空的子數組（childrens[]）（true:是，false：否）  * @param string $rootid 根節點$pkname值  *  * @return array $new_data 返回處理好的（多層級）多維數組  *  */ function deal_list_to_tree2($data, $pkname='id', $pidname='parent_id', $childname='children_list', $is_empty_childrens=false, $rootid=''){     $new_data = [];     if(!empty($data)){         foreach($data as $sordata){             if(array_key_exists($childname, $sordata) && !empty($sordata[$childname])){                 $res = deal_list_to_tree2($data, $pkname, $pidname, $childname, $is_empty_childrens, $sordata[$pkname]);             }else{                 if($sordata[$pidname] == $rootid){                     if($sordata[$pkname] != $rootid){                         $res = deal_list_to_tree2($data, $pkname, $pidname, $childname, $is_empty_childrens, $sordata[$pkname]);                     }                     if(!empty($res) && !$is_empty_childrens){                         if(array_key_exists($childname, $sordata)) {                             if(array_key_exists($childname, $sordata)){                                 for($i=0; $i < count($res); $i++){                                     $sordata[$childname][] = $res[$i];                                 }                             }else{                                 $sordata[$childname][] = $res;                             }                         }else{                             $sordata[$childname] = $res;                         }                     }                     $new_data[] = $sordata;                 }             }         }     }     return $new_data; }

[   {     "id": 1,     "area_name": "安徽省",     "pid": 0,     "level": 1,     "children": [       {         "id": 4,         "area_name": "合肥市",         "pid": 1,         "level": 2,         "children": [           {             "id": 7,             "area_name": "肥東縣",             "pid": 4,             "level": 3,             "children": [               {                 "id": 8,                 "area_name": "桃園鎮",                 "pid": 7,                 "level": 4,                 "children": [                   {                     "id": 9,                     "area_name": "八斗鄉",                     "pid": 8,                     "level": 5                   }                 ]               },               {                 "id": 10,                 "area_name": "長豐縣",                 "pid": 4,                 "level": 3               }             ]           }         ]       }     ]   },   {     "id": 2,     "area_name": "江蘇省",     "pid": 0,     "level": 1   },   {     "id": 3,     "area_name": "江西省",     "pid": 0,     "level": 1,     "children": [       {         "id": 5,         "area_name": "南昌市",         "pid": 3,         "level": 2       },       {         "id": 6,         "area_name": "九江市",         "pid": 3,         "level": 2       }     ]   } ]