ThinkPHP框架如何将递归获取的无限级分类子分类数据转化为多维数组?
在thinkphp框架中,我们可以通过递归的方式读取无限级分类的子分类。使用getchildarea()函数时,返回的是一维数组,如果您需要多维数组,可以采用以下方式改进:
function getchildarea($id){ if(!$id){ return; } static $area; $area = $area ?? new ppcommonmodelrea; $result = collection($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 $res; }
配合deal_list_to_tree2()方法,可以将一维数组转化为多维数组:
<?php /** * 方法 deal_list_to_tree2,一维数组根据$parent_id的值转为多维数组 * * @param array $data 待处理的一维数组 * @param string $pkname 用于转化为多维数组的主键字段 * @param string $pidname 用于转化为多维数组的字段(根据该字段值转换) * @param string $childname 子级的字段名 * @param bool $is_empty_childrens 是否返回空的子数组(childrens[])(true:是,false:否) * @param string $rootid 根节点$pkname值 * * @return array $new_data 返回处理好的(多层级)多维数组 * */ function deal_list_to_tree2($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; }
这样,返回的多维数组格式为:
[ { "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": "肥东县", "pid": 4, "level": 3, "children": [ { "id": 8, "area_name": "桃园镇", "pid": 7, "level": 4, "children": [ { "id": 9, "area_name": "八斗乡", "pid": 8, "level": 5 } ] }, { "id": 10, "area_name": "长丰县", "pid": 4, "level": 3 } ] } ] } ] }, { "id": 2, "area_name": "江苏省", "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 } ] } ]
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