php实现的树形结构数据存取类实例实现的树形结构数据存取类实例
本文实例讲述了php实现的树形结构数据存取类。分享给大家供大家参考。
具体实现代码如下:
复制代码 代码如下:<?php
/**
* Tanphp framework
*
*
* @category Tanphp
* @package Data_structure
* @version $Id: Tree.php 25024 2012-11-26 22:22:22 tanbo $
*/
/**
* 树形结构数据存取类
*
* 用于对树形结构数据进行快速的存取
*
* @param array $arr 参数必须为标准的二维数组,包含索引字段(id)与表示树形结构的字段(path),如example中所示
*
* @example <code>
* $arr = array(
* array( ‘id’ => 1, ‘name’ => ‘php’, ‘path’ => ‘1’ ),
* array( ‘id’ => 3, ‘name’ => ‘php1’, ‘path’ => ‘1-3’ ),
* array( ‘id’ => 2, ‘name’ => ‘mysql’, ‘path’ => ‘2’ ),
* array( ‘id’ => 6, ‘name’ => ‘mysql1’, ‘path’ => ‘2-6’ ),
* array( ‘id’ => 7, ‘name’ => ‘mysql2’, ‘path’ => ‘2-7’ ),
* array( ‘id’ => 5, ‘name’ => ‘php11’, ‘path’ => ‘1-3-5’ ),
* array( ‘id’ => 4, ‘name’ => ‘php2’, ‘path’ => ‘1-4’ ),
* );
* $cate = new Tree($arr);
*
* $data = $cate->getChild(2);
*
* print_r($data->toArray());
* </code>
*
*/
class Tree
{
public $_info; //节点信息
public $_child = array(); //子节点
private $_parent; //父节点
private $_data; //当前操作的临时数据
private static $_indexs = array(); //所有节点的索引
private static $_index_key = ‘id’; //索引键
private static $_tree_key = ‘path’; //树形结构表达键
private static $_tree_delimiter = ‘-‘; //属性结构表达分割符
/**
* 构造函数
*
* @param array $arr
* @param boole $force_sort 如果为真,将会强制对$arr 进行排序
* @return void
*/
public function __construct(array $arr = array(), $force_sort=true)
{
if ($force_sort === true) {
$arr=$this->_array_sort($arr, self::$_tree_key);
}
if (!emptyempty($arr)) {
$this->_init($arr);
}
}