PHP带节点操作的无限分类实现方法详解


Posted in PHP onNovember 09, 2016

本文实例讲述了PHP带节点操作的无限分类实现方法。分享给大家供大家参考,具体如下:

包含(移动多个节点;移动单个节点;删除多个节点;删除单个节点;新增节点),另附数据库表结构

一、db sql语句

//db used for php无限分类
create table tree(
  id int(10) not null primary key auto_increment,
  name varchar(255) not null,
  lft int(10) not null default 0,
  rgt int(10) not null default 0,
  status int(1) not null default 0,
  index lft (`lft`),
  index rgt (`rgt`),
  index status(`status`)
)charset utf8;
insert into tree value (null,'Food',1,18,0);
insert into tree value (null,'Fruit',2,11,0);
insert into tree value (null,'Red',3,6,0);
insert into tree value (null,'Cherry',4,5,0);
insert into tree value (null,'Yellow',7,10,0);
insert into tree value (null,'Banana',8,9,0);
insert into tree value (null,'Meat',12,17,0);
insert into tree value (null,'Beef',13,14,0);
insert into tree value (null,'Pork',15,16,0);

二、php文件

<?php
error_reporting(0);
/*
             1 Food 18
      +------------------------------+
    2 Fruit 11           12 Meat 17
  +-------------+         +------------+
3 Red 6   7 Yellow 10    13 Beef 14  15 Pork 16
4 Cherry 5  8 Banana 9
descendants = (right ? left - 1) / 2
*/
/**
 *用于移动一个节点(包括子节点)
 *@param array $pdata = array('id'=>主键,'root'=>名称) 二选一 父节点(为空时插入最大的父节点)
 *@param array $ndata = array('id'=>主键,'root'=>名称) 二选一 下一个兄弟节点(没有兄弟的时候就不用)
 *@param array $cdata = array('id'=>主键,'root'=>名称) 二选一 当前待移动的节点
 */
function move_tree_all($pdata=array(),$ndata=array(),$cdata=array()) {
  $cid  = $cdata['id'] ? intval($cdata['id']) : '';
  $croot = $cdata['root'];
  if(!$cid && !$croot) return;
  //需自加判断
  //1、cdata不能为顶级
  //2、cdata不能比$pdata等级高
  $adata = get_tree_all($cdata); //获取当前移动节点的所有节点
  delete_tree_all($cdata,1); //逻辑删除当前移动节点的所有节点
  foreach($adata as $k => $val) {
    if($k != 0) {
      $pdata = array('root'=>$val['parent']);
      insert_tree($pdata,'',$val['name'],1);
    } else { //first
      insert_tree($pdata,$ndata,$val['name'],1);
    }
  }
}
/**
 *用于移动一个节点(不包括子节点)
 *@param array $pdata = array('id'=>主键,'root'=>名称) 二选一 父节点(为空时插入最大的父节点)
 *@param array $ndata = array('id'=>主键,'root'=>名称) 二选一 下一个兄弟节点(没有兄弟的时候就不用)
 *@param array $cdata = array('id'=>主键,'root'=>名称) 二选一 当前待移动的节点
 */
function move_tree_item($pdata=array(),$ndata=array(),$cdata=array()) {
  $cid  = $cdata['id'] ? intval($cdata['id']) : '';
  $croot = $cdata['root'];
  if(!$cid && !$croot) return;
  //需自加判断
  //1、cdata不能为顶级
  if(!$croot) {
    $sql = "SELECT name from tree where id = $cid";
    $result = mysql_query($sql);
    $row = mysql_fetch_assoc($result);
    $croot = $row['name'];
    unset($sql);
  }
  delete_tree_item($cdata,1);
  insert_tree($pdata,$ndata,$croot,1);
}
/**
 *用于插入一个节点
 *@param array $pdata = array('id'=>主键,'root'=>名称) 二选一 父节点(为空时插入最大的父节点)
 *@param array $ndata = array('id'=>主键,'root'=>名称) 二选一 下一个兄弟节点(没有兄弟的时候就不用)
 *@param string $name string 新插入的名称
 *@param int $update 默认为空,为1时更新插入
 */
function insert_tree($pdata=array(),$ndata=array(),$name,$update='') {
  if(!$name) return;
  $pid  = $pdata['id'] ? intval($pdata['id']) : '';
  $proot = $pdata['root'];
  $nid  = $ndata['id'] ? intval($ndata['id']) : '';
  $nroot = $ndata['root'];
  //有父无兄(最小的子节点,父节点的最后一个儿子)
  if(($pid || $proot) && !($nid || $nroot)) {
    $sql  = $pid ? "SELECT lft, rgt FROM tree WHERE id = '{$pid}';" : "SELECT lft, rgt FROM tree WHERE name = '{$proot}';";
    $result = mysql_query($sql);
    $row  = mysql_fetch_assoc($result);
    unset($sql);
    //新节点
    $lft = $row['rgt'];
    $rgt = $lft+1;
    if(!$update) {
      $sql = "insert into tree values (null,'{$name}',$lft,$rgt,0);";
      $sql1 = "update tree set rgt = rgt+2 where rgt >= {$row['rgt']}";
      $sql2 = "update tree set lft = lft+2 where lft >= {$row['rgt']}";
    } else {
      $sql = "update tree set lft=$lft,rgt=$rgt,status=0 where name ='{$name}';";
      $sql1 = "update tree set rgt = rgt+2 where status =0 and rgt >= {$row['rgt']}";
      $sql2 = "update tree set lft = lft+2 where status =0 and lft >= {$row['rgt']}";
    }
    mysql_query($sql1);
    mysql_query($sql2);
    mysql_query($sql); //last add new data
  }
  //有父有兄
  if(($pid || $proot) && ($nid || $nroot)) {
    $sql  = $nid ? "SELECT lft, rgt FROM tree WHERE id = '{$nid}';" : "SELECT lft, rgt FROM tree WHERE name = '{$nroot}';";
    $result = mysql_query($sql);
    $row  = mysql_fetch_assoc($result);
    unset($sql);
    //新节点
    $lft = $row['lft'];
    $rgt = $lft+1;
    if(!$update) {
      $sql = "insert into tree values (null,'{$name}',$lft,$rgt,0);";
      $sql1 = "update tree set rgt = rgt+2 where rgt >= {$row['lft']};";
      $sql2 = "update tree set lft = lft+2 where lft >= {$row['lft']};";
    } else {
      $sql = "update tree set lft=$lft,rgt=$rgt,status=0 where name ='{$name}';";
      $sql1 = "update tree set rgt = rgt+2 where status = 0 and rgt >= {$row['lft']};";
      $sql2 = "update tree set lft = lft+2 where status = 0 and lft >= {$row['lft']};";
    }
    mysql_query($sql1);
    mysql_query($sql2);
    mysql_query($sql); //last add new data
  }
  //无父无兄(大佬)
  if(!($pid || $proot) && !($nid || $nroot)) {
    $sql  = "SELECT max(`rgt`) as rgt FROM tree;";
    $result = mysql_query($sql);
    $row  = mysql_fetch_assoc($result);
    unset($sql);
    //新节点
    $lft = 1;
    $rgt = $row['rgt']+2;
    if(!$update) {
      $sql = "insert into tree values (null,'{$name}',$lft,$rgt,0);";
      $sql1 = "update tree set rgt = rgt+1";
      $sql2 = "update tree set lft = lft+1";
    } else {
      $sql = "update tree set lft=$lft,rgt=$rgt,status=0 where name ='{$name}';";
      $sql1 = "update tree set rgt = rgt+1 where status = 0";
      $sql2 = "update tree set lft = lft+1 where status = 0";
    }
    mysql_query($sql1);
    mysql_query($sql2);
    mysql_query($sql); //last add new data
  }
}
/**
 *用于删除一个节点(包括子节点)
 *@param array $data = array('id'=>主键,'root'=>名称) 二选一
 *@param int $update 默认为空,为1时逻辑删除
 */
function delete_tree_all($data,$update='') {
  $id  = $data['id'] ? intval($data['id']) : '';
  $root = $data['root'];
  if(!$id && !$root) return;
  $sql  = $id ? "SELECT lft, rgt FROM tree WHERE id = '{$id}';" : "SELECT lft, rgt FROM tree WHERE name = '{$root}';";
  $result = mysql_query($sql);
  $row  = mysql_fetch_assoc($result);
  unset($sql);
  $middle = $row['rgt']-$row['lft']+1;
  if(!$update) {
    $sql  = "delete from tree where lft BETWEEN '" . $row['lft'] . "' AND '" . $row['rgt'] ."'";
    $sql1  = "update tree set rgt = rgt-{$middle} where rgt > {$row['rgt']}";
    $sql2  = "update tree set lft = lft-{$middle} where lft > {$row['rgt']}";
  } else {
    $sql  = "update tree set status = 1 where lft BETWEEN '" . $row['lft'] . "' AND '" . $row['rgt'] ."'";
    $sql1  = "update tree set rgt = rgt-{$middle} where status=0 and rgt > {$row['rgt']}";
    $sql2  = "update tree set lft = lft-{$middle} where status=0 and lft > {$row['rgt']}";
  }
  mysql_query($sql);
  mysql_query($sql1);
  mysql_query($sql2);
}
/**
 *用于删除一个节点(不包括子节点)
 *@param array $data = array('id'=>主键,'root'=>名称) 二选一
 *@param int $update 默认为空,为1时逻辑删除
 */
function delete_tree_item($data,$update='') {
  $id  = $data['id'] ? intval($data['id']) : '';
  $root = $data['root'];
  if(!$id && !$root) return;
  $sql  = $id ? "SELECT id,lft, rgt FROM tree WHERE id = '{$id}';" : "SELECT id,lft, rgt FROM tree WHERE name = '{$root}';";
  $result = mysql_query($sql);
  $row  = mysql_fetch_assoc($result);
  unset($sql);
  if(!$update) {
    $sql = "delete from tree where id = {$row['id']};";
    $sql1 = "update tree set rgt = rgt-1,lft = lft -1 where lft > {$row['lft']} and rgt < {$row['rgt']}";
    $sql2 = "update tree set lft = lft-2 where lft > {$row['rgt']}";
    $sql3 = "update tree set rgt = rgt-2 where rgt > {$row['rgt']}";
  } else {
    $sql = "update tree set status = 1 where id = {$row['id']};";
    $sql1 = "update tree set rgt = rgt-1,lft = lft -1 where status = 0 and lft > {$row['lft']} and rgt < {$row['rgt']}";
    $sql2 = "update tree set lft = lft-2 where status = 0 and lft > {$row['rgt']}";
    $sql3 = "update tree set rgt = rgt-2 where status = 0 and rgt > {$row['rgt']}";
  }
  mysql_query($sql);
  mysql_query($sql1);
  //can do or not do just right,but not do load empty 2 number in middle
  mysql_query($sql2);
  mysql_query($sql3);
}
/**
 *用于获取所有的节点
 *@param array $data = array('id'=>主键,'root'=>名称) 二选一
 */
function get_tree_all($data) {
  $id  = $data['id'] ? intval($data['id']) : '';
  $root = $data['root'];
  if(!$id && !$root) return;
  $sql  = $id ? "SELECT lft, rgt FROM tree WHERE id = '{$id}';" : "SELECT lft, rgt FROM tree WHERE name = '{$root}';";
  $result = mysql_query($sql);
  $row  = mysql_fetch_assoc($result);
  $adata = array(); //所有数据
  $right = array(); //计数
  $prev  = array();
  $result = mysql_query("SELECT id,name, lft, rgt FROM tree WHERE lft BETWEEN '" . $row['lft'] . "' AND '" . $row['rgt'] ."' ORDER BY lft ASC ;");
  while ($row = mysql_fetch_assoc($result)) {
    if (count($right) > 0) {
      while ($right[count($right) - 1] < $row['rgt']) { // 检查我们是否应该将节点移出堆栈
        array_pop($right);
        array_pop($prev);
      }
    }
    $parent = $prev ? end($prev) : '';
    $adata[] = array('id'=>$row['id'],'name'=>$row['name'],'level'=>count($right),'parent'=>$parent);
    $right[] = $row['rgt'];
    $prev[] = $row['name'];
  }
  return $adata;
}
/**
 *用于展示分类
 *@param array $data = array('id'=>主键,'root'=>名称) 二选一
 */
function display_tree($data) {
  $id  = $data['id'] ? intval($data['id']) : '';
  $root = $data['root'];
  if(!$id && !$root) return;
  $sql  = $id ? "SELECT lft, rgt FROM tree WHERE id = '{$id}';" : "SELECT lft, rgt FROM tree WHERE name = '{$root}';";
  $result = mysql_query($sql);
  $row  = mysql_fetch_assoc($result);
  $right = array();
  $result = mysql_query("SELECT name, lft, rgt FROM tree WHERE lft BETWEEN '" . $row['lft'] . "' AND '" . $row['rgt'] ."' ORDER BY lft ASC ;");
  while ($row = mysql_fetch_assoc($result)) {
    if (count($right) > 0) { // 检查我们是否应该将节点移出堆栈
      while ($right[count($right) - 1] < $row['rgt']) {
        array_pop($right);
      }
    }
    echo str_repeat(' ',count($right)) . $row['name'] . "\n";
    $right[] = $row['rgt'];
  }
}
mysql_connect('localhost','root','') or die('connect error');
mysql_select_db('test') or die('database error');
mysql_query('set names utf8');
display_tree(array('root'=>'Food'));
//display_tree(array('root'=>'bigboss'));
//move_tree_all($pdata=array('root'=>'Fruit'),$ndata=array('root'=>'Red'),$cdata=array('root'=>'Meat'));
//move_tree_all('','',$cdata=array('root'=>'Meat'));
//move_tree_item('','',array('root'=>'Red'));
//move_tree_item(array('root'=>'Red'),array('root'=>'Cherry'),array('root'=>'Fruit'));
//delete_tree_all(array('root'=>'Yellow'));
//delete_tree_all(array('root'=>'Meat'));
//delete_tree_item(array('root'=>'Meat'));
//insert_tree('','','bigboss');
//insert_tree(array('root'=>'Red'),'','dalao');
//insert_tree(array('root'=>'Red'),array('root'=>'Cherry'),'baddalao');
//insert_tree(array('root'=>'Fruit'),array('root'=>'Red'),'Redbother');
display_tree(array('root'=>'Food'));

希望本文所述对大家PHP程序设计有所帮助。

PHP 相关文章推荐
PHP文件上传主要代码讲解
Sep 30 PHP
限制ckeditor上传图片文件大小的方法
Nov 15 PHP
PHP中使用CURL模拟登录并获取数据实例
Jul 01 PHP
php实现的CSS更新类实例
Sep 22 PHP
PHP实现扎金花游戏之大小比赛的方法
Mar 10 PHP
php带抄送和密件抄送的邮件发送方法
Mar 20 PHP
php实现在服务器端调整图片大小的方法
Jun 16 PHP
PHP 获取ip地址代码汇总
Jul 05 PHP
php实现的Curl封装类Curl.class.php用法实例分析
Sep 25 PHP
WordPress中重置文章循环的rewind_posts()函数讲解
Jan 11 PHP
Ajax中的JSON格式与php传输过程全面解析
Nov 14 PHP
PHP遍历数组的6种方式总结
Nov 17 PHP
thinkPHP批量删除的实现方法分析
Nov 09 #PHP
基于jQueryUI和Corethink实现百度的搜索提示功能
Nov 09 #PHP
php 计算两个时间相差的天数、小时数、分钟数、秒数详解及实例代码
Nov 09 #PHP
php mysql procedure实现获取多个结果集的方法【基于thinkPHP】
Nov 09 #PHP
php利用gd库为图片添加水印
Nov 09 #PHP
php 输出json及显示json中的中文汉字详解及实例
Nov 09 #PHP
Yii2框架制作RESTful风格的API快速入门教程
Nov 08 #PHP
You might like
DedeCMS 核心类TypeLink.class.php摘要笔记
2010/04/07 PHP
Laravel 微信小程序后端实现用户登录的示例代码
2019/11/26 PHP
两种方法实现文本框输入内容提示消失
2013/03/17 Javascript
jquery实现可拖拽弹出层特效
2015/01/04 Javascript
javascript实现动态导入js与css等静态资源文件的方法
2015/07/25 Javascript
javascript日期格式化方法小结
2015/12/17 Javascript
jQuery获取父元素及父节点的方法小结
2016/04/14 Javascript
探讨:JavaScript ECAMScript5 新特性之get/set访问器
2016/05/05 Javascript
javascript实现抽奖程序的简单实例
2016/06/07 Javascript
JavaScript中style.left与offsetLeft的使用及区别详解
2016/06/08 Javascript
关于动态生成dom绑定事件失效的原因及解决方法
2016/08/06 Javascript
微信小程序 action-sheet底部菜单详解
2016/10/27 Javascript
JS异步加载的三种实现方式
2017/03/16 Javascript
yarn的使用与升级Node.js的方法详解
2017/06/04 Javascript
限时抢购-倒计时的完整实例(分享)
2017/09/17 Javascript
NodeJs实现定时任务的示例代码
2017/12/05 NodeJs
浅谈Vue.js 中的 v-on 事件指令的使用
2018/11/25 Javascript
webpack自动打包和热更新的实现方法
2019/06/24 Javascript
JavaScript遍历数组和对象的元素简单操作示例
2019/07/09 Javascript
vue+iview框架实现左侧动态菜单功能的示例代码
2020/07/23 Javascript
javascript实现时间日期的格式化的方法汇总
2020/08/06 Javascript
[01:27]DOTA2电竞之夜 今夜共饮庆功酒
2014/08/02 DOTA
使用setup.py安装python包和卸载python包的方法
2013/11/27 Python
python类参数self使用示例
2014/02/17 Python
Python异常处理总结
2014/08/15 Python
python中lambda函数 list comprehension 和 zip函数使用指南
2014/09/28 Python
利用python生成一个导出数据库的bat脚本文件的方法
2016/12/30 Python
pycharm-professional-2020.1下载与激活的教程
2020/09/21 Python
HTML5 表单验证失败的提示语问题
2017/07/13 HTML / CSS
Html5定位终极解决方案
2020/02/05 HTML / CSS
英国最大的经认证的有机超市:Planet Organic
2018/02/02 全球购物
专业销售业务员求职信
2013/11/18 职场文书
贫困证明模板(3篇)
2014/09/16 职场文书
MySQL8.0.24版本Release Note的一些改进点
2021/04/22 MySQL
SpringBoot系列之MongoDB Aggregations用法详解
2022/02/12 MongoDB
Python中time与datetime模块使用方法详解
2022/03/31 Python