php菜单/评论数据递归分级算法的实现方法

 $menuList = [
  [ 'id' => 1,'parent_id' => 0, 'name' => '节点1'],
  [ 'id' => 2,'parent_id' => 1, 'name' => '节点1-1'],
  [ 'id' => 3,'parent_id' => 0, 'name' => '节点2'],
  [ 'id' => 4,'parent_id' => 3, 'name' => '节点2-1'],
  [ 'id' => 5,'parent_id' => 2, 'name' => '节点1-1-1'],
  [ 'id' => 6,'parent_id' => 1, 'name' => '节点1-2'],
 ];

$treeList = [
 [
 children: [
  children: []
 ]
 ]
 [,
 children: [
  children: []
 ]
 ]
];

<?php

class Menu
{
 /**
  * 递归循环菜单列表, 转化为菜单树
  * @param $treeList 菜单树列表
  * @param $menuList 菜单列表
  * @return bool
  */
 public function getMenuTree(&$treeList, $menuList)
 {
  // 初始化顶级父节点
  if (! count($treeList)) {
   foreach($menuList as $index => $menu) {
    if ($menu['parent_id'] == 0) {
     $treeList[] = $menu;
     unset($menuList[$index]);
    }
   }
  }

  // 递归查找子节点
  foreach ($treeList as &$tree) {
   foreach ($menuList as $index => $menu) {
    if (empty($tree['children'])) {
     $tree['children'] = [];
    }
    if ($menu['parent_id'] == $tree['id']) {
     $tree['children'][] = $menu;
     unset($menuList[$index]);
    }
   }
   if (! empty($tree['children'])) {
    $this->getMenuTree($tree['children'], $menuList);
   } else {
    // 递归临界点
    return false;
   }
  }
 }

}

$menuList = [
 [ 'id' => 1,'parent_id' => 0, 'name' => '节点1'],
 [ 'id' => 2,'parent_id' => 1, 'name' => '节点1-1'],
 [ 'id' => 3,'parent_id' => 0, 'name' => '节点2'],
 [ 'id' => 4,'parent_id' => 3, 'name' => '节点2-1'],
 [ 'id' => 5,'parent_id' => 2, 'name' => '节点1-1-1'],
 [ 'id' => 6,'parent_id' => 1, 'name' => '节点1-2'],
];
$treeList = [];
(new Menu)->getMenuTree($treeList, $menuList);
print_r($treeList);