生成树形结构的简单方式
有Relation_key的关系数据,都可以生成树状的结构
$ composer require lambert/tree-shape
- PHP >= 5.6
use Lambert\TreeShape\Manager;
$category = [
['id' => 1, 'name' => '节点1', 'pid' => 0],
['id' => 2, 'name' => '节点2', 'pid' => 0],
['id' => 3, 'name' => '节点3', 'pid' => 1],
['id' => 4, 'name' => '节点4', 'pid' => 1],
];
// Start build
$manager = Manager::buildTree($category, 'pid');
$tree = $manager->all();
生成后:
Array
(
[1] => Lambert\TreeShape\Tree Object
(
[childrenIds:protected] => Array
(
[0] => 3
[1] => 4
)
[recursionChildrenIds:protected] =>
[currentNode:protected] => Lambert\TreeShape\Node Object
(
[data:protected] => Array
(
[id] => 1
[name] => 节点1
[pid] => 0
)
)
[leftTree:protected] =>
[rightTree:protected] => Array
(
[3] => Lambert\TreeShape\Tree Object
(
[childrenIds:protected] =>
[recursionChildrenIds:protected] =>
[currentNode:protected] => Lambert\TreeShape\Node Object
(
[data:protected] => Array
(
[id] => 3
[name] => 节点3
[pid] => 1
)
)
[leftTree:protected] => Lambert\TreeShape\Tree Object
*RECURSION*
[rightTree:protected] =>
)
[4] => Lambert\TreeShape\Tree Object
(
[childrenIds:protected] =>
[recursionChildrenIds:protected] =>
[currentNode:protected] => Lambert\TreeShape\Node Object
(
[data:protected] => Array
(
[id] => 4
[name] => 节点4
[pid] => 1
)
)
[leftTree:protected] => Lambert\TreeShape\Tree Object
*RECURSION*
[rightTree:protected] =>
)
)
)
[2] => Lambert\TreeShape\Tree Object
(
[childrenIds:protected] =>
[recursionChildrenIds:protected] =>
[currentNode:protected] => Lambert\TreeShape\Node Object
(
[data:protected] => Array
(
[id] => 2
[name] => 节点2
[pid] => 0
)
)
[leftTree:protected] =>
[rightTree:protected] =>
)
)
- 查找某个Tree
$tree = $manager->findTree('name', '子节点1');
Lambert\TreeShape\Tree Object
(
[childrenIds:protected] => Array
(
[0] => 3
[1] => 4
)
[recursionChildrenIds:protected] =>
[currentNode:protected] => Lambert\TreeShape\Node Object
(
[data:protected] => Array
(
[id] => 1
[name] => 节点1
[pid] => 0
)
)
[leftTree:protected] =>
[rightTree:protected] => Array
(
[3] => Lambert\TreeShape\Tree Object
(
[childrenIds:protected] =>
[recursionChildrenIds:protected] =>
[currentNode:protected] => Lambert\TreeShape\Node Object
(
[data:protected] => Array
(
[id] => 3
[name] => 节点3
[pid] => 1
)
)
[leftTree:protected] => Lambert\TreeShape\Tree Object
*RECURSION*
[rightTree:protected] =>
)
[4] => Lambert\TreeShape\Tree Object
(
[childrenIds:protected] =>
[recursionChildrenIds:protected] =>
[currentNode:protected] => Lambert\TreeShape\Node Object
(
[data:protected] => Array
(
[id] => 4
[name] => 节点4
[pid] => 1
)
)
[leftTree:protected] => Lambert\TreeShape\Tree Object
*RECURSION*
[rightTree:protected] =>
)
)
)
- 获取当前树的左、右子树
$leftTree = $tree->getLeftTree();
$rightTree = $tree->getRightTree();
Lambert\TreeShape\Tree Object
(
[childrenIds:protected] => Array
(
[0] => 3
[1] => 4
)
[recursionChildrenIds:protected] =>
[currentNode:protected] => Lambert\TreeShape\Node Object
(
[data:protected] => Array
(
[id] => 1
[name] => 节点1
[pid] => 0
)
)
[leftTree:protected] =>
[rightTree:protected] =>
)
**注意:获取右子树时,根据自己数据类型的关系,多个右子树的话,会返回Array**
- 获取节点属性
继承了SPL的ArrayAccess,可以使用数组或属性的方式访问
$node = $tree->getCurrentNode();
$node['name'] or $node->name; // 节点1
$node['id'] or $node->id; // 1
...
MIT