不用递归实现无限级分类，简单测试了下性能比递归稍好一点点点，但写得太复杂了，还是递归简单方便点

代码：

<?php
$list = array(
  array('id'=>1, 'pid'=>0, 'deep'=>0, 'name'=>'test1'),
  array('id'=>2, 'pid'=>1, 'deep'=>1, 'name'=>'test2'),
  array('id'=>3, 'pid'=>0, 'deep'=>0, 'name'=>'test3'),
  array('id'=>4, 'pid'=>2, 'deep'=>2, 'name'=>'test4'),
  array('id'=>5, 'pid'=>2, 'deep'=>2, 'name'=>'test5'),
  array('id'=>6, 'pid'=>0, 'deep'=>0, 'name'=>'test6'),
  array('id'=>7, 'pid'=>2, 'deep'=>2, 'name'=>'test7'),
  array('id'=>8, 'pid'=>5, 'deep'=>3, 'name'=>'test8'),
  array('id'=>9, 'pid'=>3, 'deep'=>2, 'name'=>'test9'),
);
function resolve($list) {
  $newList = $manages = $deeps = $inDeeps = array();
  foreach ($list as $row) {
    $newList[$row['id']] = $row;
  }
  $list = null;
  foreach ($newList as $row) {
    if (! isset($manages[$row['pid']]) || ! isset($manages[$row['pid']]['children'][$row['id']])) {
      if ($row['pid'] > 0 && ! isset($manages[$row['pid']]['children'])) $manages[$row['pid']] = $newList[$row['pid']];
      $manages[$row['pid']]['children'][$row['id']] = $row;
    }
    if (! isset($inDeeps[$row['deep']]) || ! in_array($row['id'], $inDeeps[$row['deep']])) {
      $inDeeps[$row['deep']][] = array($row['pid'], $row['id']);
    }
  }
  krsort($inDeeps);
  array_shift($inDeeps);
  foreach ($inDeeps as $deep => $ids) {
    foreach ($ids as $m) {
      // 存在子栏目的进行转移
      if (isset($manages[$m[1]])) {
        $manages[$m[0]]['children'][$m[1]] = $manages[$m[1]];
        $manages[$m[1]] = null;
        unset($manages[$m[1]]);
      }
    }
  }
  return $manages[0]['children'];
}

递归实现

function resolve2(& $list, $pid = 0) {
  $manages = array();
  foreach ($list as $row) {
    if ($row['pid'] == $pid) {
      $manages[$row['id']] = $row;
      $children = resolve2($list, $row['id']);
      $children && $manages[$row['id']]['children'] = $children;
    }
  }
  return $manages;
}

以上这篇PHP不使用递归的无限级分类简单实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持积木网。

浅谈php中的循环while、do...while、for、foreach四种循环
php中的while循环，循环执行代码块制定的次数，或者当指定的条件为真时循环执行代码块。-------------------------------------------------------------在我们编写代

PHP实现一个简单url路由功能实例
什么是php的路由机制1、路由机制就是把某一个特定形式的URL结构中提炼出来系统对应的参数。举个例子,如：http://main.test.com/article/1其中：/article/1-_m=arti

PHP中用mysqli面向对象打开连接关闭mysql数据库的方法
如下所示：代码如下：metahttp-equiv="content-type"content="text/html"charset="utf-8"/h1用mysqli面向对象方法连接数据库！-姚远的博客/h1formmethod="POST"action="phpechohtmlspec