宜配屋

PHP带节点操作的无限分类实现方法详解

yipeiwu_com5年前PHP代码库

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'));

更多关于PHP相关内容感兴趣的读者可查看本站专题：《php字符串(string)用法总结》、《PHP数组(Array)操作技巧大全》、《PHP基本语法入门教程》、《PHP运算与运算符用法总结》、《php面向对象程序设计入门教程》、《PHP网络编程技巧总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》

希望本文所述对大家PHP程序设计有所帮助。

返回列表

上一篇：Python字符转换

下一篇：PHP生成静态页面详解

相关文章

PHP实现简单实用的分页类代码

PHP实现简单实用的分页类代码

本文实例讲述了PHP实现简单实用的分页类。分享给大家供大家参考，具体如下： <?php class Page { private $total; //...

PHP CodeIgniter框架的工作原理研究

PHP CodeIgniter框架的工作原理研究

CodeIgniter（以下简称CI，官网以及中国站）是一个流行的PHP框架，小巧但功能强大，简洁轻量同时拥有很好的扩展性，在国内也比较受欢迎。另一方面，CI却没有与时俱进，并不支持PH...

PHP中auto_prepend_file与auto_append_file用法实例分析

本文实例讲述了PHP中auto_prepend_file与auto_append_file的用法，是PHP程序设计中比较实用的技巧。分享给大家供大家参考。具体方法如下： 如果需要将文件r...

PHP array操作10个小技巧分享

1、向array中添加元素 php是一个弱类型语言。因此不必象c语言那样为php array声明长度。向其中添加元素的过程也是声明和初始化的过程。 复制代码 代码如下: $capital...

PHP实现时间日期友好显示实现代码

系统的友好性在开发过程中是非常重要的，一个系统非常友好不光可以带给用户非常棒的使用体验，而且还可以使系统有这更长的寿命。今天这篇博文主要来展示一个我们如何让日期时间更加友好的显示。 下面...

© YiPeiWu.com 【宜配屋】 粤ICP备17031333号

Powered By Z-BlogPHP. Theme by TOYEAN.