带孩子的孩子循环遍历数组 [英] Looping through an array with children of children
问题描述
我正在尝试制作和保存一棵树,其中一个项目可以是另一个项目的子项.但是这个孩子也可以有孩子等.因此,例如,我得到一个像这样的数组:
I am trying to make and save a tree of items where one item can be a child of another. But this child can also have children etc etc. So for instance I am getting an array like:
array(
[0] array(
'id' => 100
),
[1] array(
'id' => 101,
'children' => array(
[0] array(
'id' => 103
)
)
)
)
或作为JSON:
[{"id":1},{"id":3,"children":[{"id":4},{"id":5},{"id":6}]},{"id":2},{"id":7,"children":[{"id":8},{"id":9}]},{"id":10,"children":[{"id":11},{"id":12}]}][{"id":1},{"id":3,"children":[{"id":4},{"id":5},{"id":6}]},{"id":2},{"id":7,"children":[{"id":8},{"id":9}]},{"id":10,"children":[{"id":11},{"id":12}]}]
使用以下代码,我可以更深入地找到孩子并执行操作.当然,我可以添加另一个if有子对象,但这将意味着很多if和foreach语句到达数组的底部.尤其是据我所知,有时候孩子在实践中可以深入到10个层次.
With below code I can go one level deep to find children and perform an action. Of course I can add another if has children, but that would mean a whole lot of if and foreach statements to get to a bottom of the array. Especially as I know sometimes children can go like 10 levels deep in practice.
public function sortPages(Request $request) {
$data = json_decode($request->data);
foreach($data as $sort=>$id) {
$this->saveSortingOrder($id->id, $sort);
if(isset($id->children)) {
foreach($id->children as $sort_next=>$id_next) {
$this->saveSortingOrder($id_next->id, $sort_next);
$this->setParent($id_next->id, $id->id);
}
}
}
}
有没有简单的方法可以完成工作?
Is there an easy way to get the job done?
使用以下代码修复了该问题:
Fixed it using below code:
public function sortPages(Request $request) {
$data = json_decode($request->data);
foreach($data as $sort_value=>$id) {
$this->saveSortingOrder($id->id, $sort_value);
if(isset($request->parent)) {
$this->setParent($id->id, $request->parent);
}
if(isset($id->children)) {
$new_request = new Request;
$new_request->data = json_encode($id->children);
$new_request->parent = $id->id;
$this->sortPages($new_request);
}
}
}
推荐答案
递归将很有帮助.这是一个示例:
Recursion will be helpfull. Here is an example:
private function checkArrayRecursively($arr)
{
if ($arr) {
foreach ($arr as $value) {
if (is_array($value)) {
// do something
checkArrayRecursively($value);
}
}
}
}
这篇关于带孩子的孩子循环遍历数组的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!