PHP生成树的方法_PHP教程

本文实例讲述了PHP生成树的方法。分享给大家供大家参考。具体如下：

这个类不是我写的只添加了getAll()函数
php生成一个树，可以用于产品分类
不知道遍历写的是否优化，如果你有请分享一下吧 -.-！

运行效果如下图所示：

PHP生成树的方法

实现代码如下：

				?

									<?php

									class Tree

									{

									 public $data=array();

									 public $cateArray=array();

									 public $res=array();

									 function Tree()

									 {

									 }

									 function setNode ($id, $parent, $value)

									 {

									  $parent = $parent?$parent:0;

									  $this->data[$id] = $value;

									  //print_r($this->data);

									  //echo "\r\n";

									  $this->cateArray[$id] = $parent; //节点数组

									  //print_r($this->cateArray);

									 }

									 function getChildsTree($id=0)

									 {

									  $childs=array();

									  foreach ($this->cateArray as $child=>$parent)

									  {

									   if ($parent==$id)

									   {

									    $childs[$child]=$this->getChildsTree($child);

									   }

									  }

									  print_r($childs)."/r/n";

									  return $childs;

									 }

									 function getParentsTree($id=0)

									 {

									  $parents=array();

									  foreach ($this->cateArray as $child=>$parent)

									  {

									   if ($child ==$id)

									   {

									    $parents[$parent]=$this->getParentsTree($parent);

									   }

									  }

									  print_r($parents)."/r/n";

									  return $parents;

									 }

									 function getChilds($id=0)

									 {

									  $childArray=array();

									  $childs=$this->getChild($id);

									  foreach ($childs as $child)

									  {

									   $childArray[]=$child;

									   $childArray=array_merge($childArray,$this->getChilds($child));

									  }

									  return $childArray;

									 }

									 function getChild($id)

									 {

									  $childs=array();

									  foreach ($this->cateArray as $child=>$parent)

									  {

									  if ($parent==$id)

									  {

									   $childs[$child]=$child;

									  }

									  }

									  return $childs;

									 }

									 function getParents($id)

									 {

									  $parentArray=array();

									  $parents=$this->getParent($id);

									  foreach ($parents as $parent)

									  {

									   $parentArray[]=$parent;

									   $parentArray=array_merge($parentArray,$this->getParents($parent));

									  }

									  return $parentArray;

									 }

									 function getParent($id)

									 {

									  $parents=array();

									  foreach ($this->cateArray as $child=>$parent)

									  {

									   if ($child==$id)

									   {

									   $parents[$parent]=$parent;

									   }

									  }

									  return $parents;

									 }

									 //单线获取父节点

									 function getNodeLever($id)

									 {

									  $parents=array();

									  if (key_exists($this->cateArray[$id],$this->cateArray))

									  {

									   $parents[]=$this->cateArray[$id];

									   $parents=array_merge($parents,$this->getNodeLever($this->cateArray[$id]));

									  }

									  return $parents;

									 }

									 function getLayer($id,$preStr='|-')

									 {

									  return str_repeat($preStr,count($this->getNodeLever($id)));

									 }

									 function getValue ($id)

									 {

									  return $this->data[$id];

									 } // end func

									 //获取所有节点数据生成树

									 function getAll($id=0,$str="|-"){

									  if($id!=0){

									   $str=$str."|-";

									  }

									  //遍历所有数组检查parent是否有id

									  foreach($this->cateArray as $child=>$parent){

									   //检查是否有相等的ID

									   if($parent==$id){

									    $this->res[$child]=$str.$this->getValue($child);

									    $this->getAll($child,$str);

									   }

									   //$this->res[$child]=$child.$str.$this->getValue($child);

									  }

									 }

									}

									//构造树

									//setNode ($id, $parent, $value)

									$tree = new Tree();

									$tree->setNode("1","","电器");

									$tree->setNode("2","","服装");

									$tree->setNode("3","1","电脑");

									$tree->setNode("4","1","家电");

									$tree->setNode("5","2","男装");

									$tree->setNode("6","2","女装");

									$tree->setNode("7","3","笔记本");

									$tree->setNode("8","3","台式机");

									$tree->setNode("9","7","惠普");

									$tree->setNode("10","7","戴尔");

									$tree->setNode("11","8","火星人");

									$tree->setNode("12","5","西装");

									$tree->setNode("13","6","上衣");

									$tree->setNode("14","9","惠普-N90");

									$tree->setNode("15","9","惠普-N91");

									$tree->setNode("16","10","戴尔A11");

									$tree->setNode("17","10","戴尔A12");

									$tree->setNode("18","10","戴尔A13");

									$tree->setNode("19","6","裤子 ");

									$tree->setNode("20","13","长袖");

									$tree->setNode("21","13","短袖");

									$tree->setNode("22","20","NIKE长袖");

									$tree->setNode("23","20","361长袖");

									$tree->setNode("24","22","NIKE长袖-均码");

									$tree->setNode("25","22","NIKE长袖-短码");

									$tree->setNode("26","14","惠普-N90-14寸");

									$tree->setNode("27","14","惠普-N90-15寸");

									$tree->setNode("28","14","惠普-N90-17寸");

									$tree->setNode("29","28","惠普-N90-17寸-高性能企业版");

									$tree->setNode("30","28","惠普-N90-17寸-普通家用版");

									//获取一个节点的所有父节点

									//print_r ($tree->getNodeLever(12));

									//print_r ($tree->getParentsTree(12));

									//$childs = $tree->getChildsTree(1);

									//print_r($childs);

									//echo "/r/n/r/n/r/n/r/n";

									/*

									foreach($childs as $key=>$value){

									 echo $key."<br>";

									 //echo $tree->getLayer($key).$tree->getValue($key)."<br>";

									}

									*/

									$tree->getAll();

									foreach($tree->res as $val){

									 echo $val."<br>";

									}

									?>

									<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"

									"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

									<html xmlns="http://www.w3.org/1999/xhtml">

									<head>

									<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

									<title>生成Tree</title>

									</head>

									<body>

									<h5>生成标签测试</5>

									<select>

									<?php

									 foreach($tree->res as $key=>$val){

									  echo "<option value='{$key}'>{$val}</option>";

									 }

									?>

									</select>

									</body>

									</html>