php 系统树形类，以树形方式显示

浏览数：32 / 时间：2015年06月09日

<?php
/**
*系统树形类，以树形方式显示
*
*
*/
header("Content-type: text/html; charset=utf-8;");
class TreeModel{
    /**
    *树形标识
    */
    public $icon = array(‘│‘,‘├‘,‘└‘);
    public $nbsp = "   ";
    /**
    *树形的二维数组数据
    */
    public $arr = array();
   public $arrTree = array();
   public $ret;

   /**
   *初始化数组，传入的数组必须是
   * array(
   *      1 => array(‘id‘=>‘1‘,‘parentid‘=>0,‘name‘=>‘一级栏目一‘),
   *      2 => array(‘id‘=>‘2‘,‘parentid‘=>0,‘name‘=>‘一级栏目二‘),
   *      3 => array(‘id‘=>‘3‘,‘parentid‘=>1,‘name‘=>‘二级栏目一‘)
   *)这种形式数组下标与当前数据ID相同
   */
    public function init($arr = array()){
        if(!empty($arr) && is_array($arr)) {
             $this->arr = $arr;
        }
        return $this->arr;
    }

    //-------------------------------------------------------------------

    /**
    *获得全部的树形数据
   *每个父类的子类在$arr[son]数据中
    *占用空间比较大
    */
    public function GetArrayTreeSpace()
    {
       $tmpArray    = array(); //临时数组
       $tmpSonArray = array();
       $tmp         = array();

           $tmpArray = $this->arr;

       $key = ‘‘;
       foreach($tmpArray as $key=>$tmp) {
           if($tmp[‘parentid‘]) {//如果存在父级ID
               $tmpArray[$tmp[‘parentid‘]][‘son‘][] = &$tmpArray[$key];
               $tmpSonArray[] = $key;
           }
       }
       foreach($tmpSonArray as $key) {
           unset($tmpArray[$key]);
       }
       unset($tmpSonArray);
       return $this->arrTree = $tmpArray;
    }
   /**
   *获得此类的同级父数组，
   *
   */
   public function GetParent($myid) {
       $tmp = array();
       $parentid = $this->arr[$myid][‘parentid‘];
       $parentid = $this->arr[$parentid][‘parentid‘];
       foreach($this->arr as $v) {
           if($parentid == $v[‘parentid‘]) {
               $tmp[] = $v;
           }
       }
   }

   /**
   *获得此类的子类
   *
   */
   public function GetChild($myid) {
       $tmp = array();
       foreach($this->arr as $key=>$v) {
           if($v[‘parentid‘] == $myid){
               $tmp[$key] = $v;
           }
       }
       return $tmp;
   }
   /**
   *输出html格式的树形
   *@param 数据
   *@param 输出的格式
   */
   public function GetViewTreeSpace($arr,$str,$adds=‘‘) {
       $ret = ‘‘;
       $nbsp = $this->nbsp;
       $spacer = $adds ? $this->icon[1].$nbsp.$adds : ‘‘;
       foreach($arr as $tmp) {
           @extract($tmp); //转换数组下标为变量
           eval("\$nstr = \"$str\";");
           $ret .= $nstr;
           if(isset($tmp[‘son‘])) {
               $ret .= $this->GetViewTreeSpace($tmp[‘son‘],$str,$nbsp.$this->icon[2].$adds);
           }
       }
       return $ret;
   }
   /**
   *输出html格式的树形
   *@param 父级ID
   *@param 输出的格式
   */
    public function GetViewTree($myid,$str,$adds=‘‘) {
       $child = $this->GetChild($myid);
       $nbsp = $this->nbsp;
       $spacer = $adds ? $this->icon[1].$nbsp.$adds : ‘‘;
       foreach($child as $key=>$tmp) {
           @extract($tmp); //转换数组下标为变量
           eval("\$nstr = \"$str\";");
           $this->ret .= $nstr;
           $this->GetViewTree($key,$str,$nbsp.$this->icon[2].$adds);
       }
       return $this->ret;
   }

}

   $array = array(
          1 => array(‘id‘=>‘1‘,‘parentid‘=>0,‘name‘=>‘一级栏目一‘),
          2 => array(‘id‘=>‘2‘,‘parentid‘=>0,‘name‘=>‘一级栏目二‘),
          3 => array(‘id‘=>‘3‘,‘parentid‘=>1,‘name‘=>‘二级栏目一‘),
          4 => array(‘id‘=>‘4‘,‘parentid‘=>0,‘name‘=>‘一级栏目一‘),
          5 => array(‘id‘=>‘5‘,‘parentid‘=>2,‘name‘=>‘二级栏目二‘),
          6 => array(‘id‘=>‘6‘,‘parentid‘=>5,‘name‘=>‘三级栏目一‘),
          7 => array(‘id‘=>‘7‘,‘parentid‘=>3,‘name‘=>‘三级栏目一‘),
          8 => array(‘id‘=>‘8‘,‘parentid‘=>7,‘name‘=>‘四级栏目二‘),
          9 => array(‘id‘=>‘9‘,‘parentid‘=>1,‘name‘=>‘二级栏目一‘),
          10 => array(‘id‘=>‘10‘,‘parentid‘=>0,‘name‘=>‘一级栏目一‘),
          11 => array(‘id‘=>‘11‘,‘parentid‘=>2,‘name‘=>‘二级栏目二‘)
          );
       $Trees = new TreeModel();
       $Trees->init($array);
       //print_r($array);
       $str = ‘<li>$spacer $name [id] $id</li>‘;
       echo $Trees->GetViewTree(0, $str);
       echo ‘<br/><br/><br/><br/>‘;
       $arr = $Trees->GetArrayTreeSpace();

       echo $Trees->GetViewTreeSpace($arr,$str);