- 使用递归把数据构造成树形结构数据
- 常用于菜单、权限、分类等功能实现
- 避免多次查询数据库,使用php来处理
composer require wxxiong6/tree//设置主键、parent标识名称 子节点名称
Tree::setConfig($primary = '', $parentId = '', $child = '');
//生成tree
Tree::makeTree($data);运行结果
Array
(
[0] = Array
(
[id] = 1
[city] = 中国
[parent_id] = 0
[child] = Array
(
[0] = Array
(
[id] = 2
[city] = 北京
[parent_id] = 1
[child] = Array
(
[0] = Array
(
[id] = 3
[city] = 北京市
[parent_id] = 2
[child] = Array
(
[0] = Array
(
[id] = 4
[city] = 东城区
[parent_id] = 3
)
)
)
)
)
[1] = Array
(
[id] = 11
[city] = 上海
[parent_id] = 1
[child] = Array
(
[0] = Array
(
[id] = 12
[city] = 上海市
[parent_id] = 11
)
)
)
)
)
)