根据树状结构划分层级
在 php 中，我们可以使用递归来实现根据树状结构划分层级：
假定输入 $tree 数组如下：
[
{"id":1,"name":"人事","pid":0,"level":0,"son":[{"id":3,"name":"招聘部","pid":1,"level":1,"son":[{"id":7,"name":"研发部","pid":3,"level":2,"son":[]},{"id":8,"name":"行政部","pid":3,"level":2,"son":[]}]},{"id":4,"name":"人事部","pid":1,"level":1,"son":[]}]},
{"id":2,"name":"技术部","pid":0,"level":0,"son":[{"id":5,"name":"研发部","pid":2,"level":1,"son":[]},{"id":6,"name":"运维部","pid":2,"level":1,"son":[]}]}
]
登录后复制
递归函数：
立即学习“PHP免费学习笔记（深入）”；
function groupbylevel($tree) {
$result = [];
foreach ($tree as $node) {
$result[$node['level']][] = $node;
if (!empty($node['son'])) {
$result = array_merge($result, groupbylevel($node['son']));
}
}
return $result;
}
登录后复制
执行该函数：
$result = groupbylevel($tree);
登录后复制
输出结果：
[
0 => [
{"id":1,"name":"人事","pid":0,"level":0,"son":[...]},
{"id":2,"name":"技术部","pid":0,"level":0,"son":[...]},
],
1 => [
{"id":3,"name":"招聘部","pid":1,"level":1,"son":[...]},
{"id":4,"name":"人事部","pid":1,"level":1,"son":[...]},
{"id":5,"name":"研发部","pid":2,"level":1,"son":[...]},
{"id":6,"name":"运维部","pid":2,"level":1,"son":[...]},
],
2 => [
{"id":7,"name":"研发部","pid":3,"level":2,"son":[]},
{"id":8,"name":"行政部","pid":3,"level":2,"son":[]},
],
]
登录后复制
以上就是如何用PHP递归函数根据树状结构划分层级？的详细内容，更多请关注php中文网其它相关文章！