一棵php的类树(支持无限分类)

网络编程 2024/11/15 佚名

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无为清净楼资源网 Design By www.qnjia.com

最近问无限分类的类树问题比较多，所以一高兴自己写了一个，我刚写完的，大家用用看，看看怎么实现起来更快，更简单，把你的树也贴出来(要只查询一次数据库的)<br>

这是一棵分类列表的类树, 支持无限分类<br>
一个分类下面可以同时有"包含子类的分类"和"最终分类";<br>

唯一的优点是*****只需要进行一次的数据库*****查询.<br>

样子不是很好看，不过可以自定义修改,可以自己定义css加里面<br>

缓存方面还没有作，可以自己补上

下面例子的目录结构是这样的。
¦--Catagory.php                                        <br>
¦--images----tree.jsp                            <br>
¦--images----treeopen.gif                    <br>
¦--images----treeclose.gif                  <br>
¦--images----line.gif                            <br>

/****************tree.jsp********************/
function expand(id){
           node = document.all('node'+id);
           if(node.style.display==''){
                       node.style.display = 'none';
                       document.images('img'+id).src = imgopen;
           }else{
                       node.style.display = '';
                       document.images('img'+id).src = imgclose;
           }
}

/****************Catagory.php********************/
<?php

define('CATAGORY_TREE_EXPEND_NONE',0);
define('CATAGORY_TREE_EXPEND_ALL',1);

class Catagory{
       //基础分类数据
           var $treeData = array();
       //分类的等级结构数组，以分类的id值作为数组的关键字
       var $treePList = array();
       //自分类对应上级类的关系
       var $treeCList = array();
/*
         * 这个是大分类的模板
         *
         * __id__          分类的编号
         * __name__      分类的名称
         * __image__    分类前面显示的图像名称 $imgOpen or $imgClose
         * __open__      分类当前是否是展开的
         * __inner__    子分类显示的位置 * 样式可以根据自己的需要任意修改，但是不能删除现有的元素
       */
       var $blockTpl = '
   <table border="0" cellpadding="0" cellspacing="0">
<tr>
<td colspan="2"><a onclick="expand(__id__); return false;" href="#">
    <img src="/UploadFiles/2021-04-02/__image__">     <a onclick="expand(__id__); return false;" href="#">
   __name__</a></td>
   </tr>
   <tr id="node__id__" style="display:__open__;">
                               <td width="20"></td><td>__inner__</td>
       </tr>
</table>';
       /*
         * 这个是小分类的模板
         *
         * see $blockTpl
       */
       var $elementTpl = '<img src="/UploadFiles/2021-04-02/line.gif">       /*
         * 这个是当前位置显示模板
         *
         * see $blockTpl
       */
       var $currentTpl = '<a href="?id=__id__"><font color="white">__name__</font></a>';
       var $js = "images/tree.js";

       var $imgOpen = 'images/treeopen.gif';
       var $imgClose = 'images/treeclose.gif';
       var $imgLine = 'images/line.gif';

       var $cachFile = '';
       var $expand = 0;

       var $result = array();
       var $treeStr = '';
       var $currentStr = '';
       /*
         * 用来初始化，传入分类数据
         *
         *param $data array()
       */
           function Catagory(&$data){
               $this->_init($data);
       }

       function _init($tmpData){
               $plevel = $clevel = $treeData = array(); foreach($tmpData as $value){
                           $treeData[$value['id']] = $value;
                           $plevel[$value['pid']][$value['id']] = 'END';
                       $clevel[$value['id']] = $value['pid'];
                   }
               $this->treeData = &$treeData;
               $this->treePList = &$plevel;
               $this->treeCList = &$clevel;
           }
       /*
         * 解析分类列表
         *
         *param $cataId int 要解析的主分类的编号
       */
       function parseNode($cataId=0){
               $this->result = $this->treePList[$cataId];
               if($this->result==null) die("Catagory id error");
                   $this->treeStr =    $this->_doNode($this->result);
               $this->treeStr .= $this->_jsParse();
       }

           function &_doNode(&$result){
                   $nstr = $estr = '';
                   foreach($result as $key=>$value){
                           if(isset($this->treePList[$key])){
                                   $result[$key] = $this->treePList[$key];
                                   $inner = $this->_doNode($result[$key]);
                               $nstr .= $this->_parseNodeTpl($key, $inner);
                           }else{
                               $estr .= $this->_parseElementTpl($key);
                       }
               }
               return $nstr.$estr;
           }

       function &_parseNodeTpl($cataId, $inner){
               $data = $this->treeData[$cataId];
               $str = preg_replace(' ¦__id__ ¦', $data['id'], $this->blockTpl);
               $str = preg_replace(' ¦__name__ ¦', $data['name'], $str);
               $str = preg_replace(' ¦__image__ ¦', ($this->expand? $this->imgClose:$this->imgOpen), $str);
               $str = preg_replace(' ¦__open__ ¦', ($this->expand?'':'none'), $str);
               $str = preg_replace(' ¦__inner__ ¦', $inner, $str);
               return $str;
       }

       function _parseElementTpl($cataId){
               $data = $this->treeData[$cataId];
               $str = preg_replace(' ¦__id__ ¦', $data['id'], $this->elementTpl);
               $str = preg_replace(' ¦__name__ ¦', $data['name'], $str);
               $str = preg_replace(' ¦__image__ ¦', $this->imgLine, $str);
               return $str;
       } function _jsParse(){
                   $str = "<script language=\"javascript\">
                               imgopen = \"$this->imgOpen\";
                                   imgclose = \"$this->imgClose\";
                                   </script><script src=\"$this->js\" language=\"javascript\"></script>";
               return $str;
       }
       /*
         * 展开分类$cataId
         *
         *param $cataId int 要展开的分类的编号
       */
       function parseCurrent($cataId){
               $str = '';
               $str .= $this->_parseCurrentTpl($cataId);
               while(isset($this->treeCList[$cataId]) && $this->treeCList[$cataId]!=0){
                       $cataId = $this->treeCList[$cataId];
                       $str = $this->_parseCurrentTpl($cataId).'->'.$str;
               }
               $this->currentStr = &$str;
       }

       function _parseCurrentTpl($cataId){
               $data = $this->treeData[$cataId];
               $str = preg_replace(' ¦__id__ ¦', $data['id'], $this->currentTpl);
               $str = preg_replace(' ¦__name__ ¦', $data['name'], $str);
               return $str;
       }
       /*
         * 解析当前分类的路径
         *
         *param $cataId int 要解析的主分类的编号
       */
       function expand($cataId){
                   if($this->expand>0) return ;
                   $str = '';
               if(isset($this->treePList[$cataId])) $str .= "expand($cataId);";
               while(isset($this->treeCList[$cataId]) && $this->treeCList[$cataId]!=0){
                       $str .= "expand(".$this->treeCList[$cataId].");";
                       $cataId = $this->treeCList[$cataId];
               }
               $this->treeStr .= "<script language=\"javascript\">$str</script>";
       }
       /*
         * 返回当前分类的路径
       */
       function getCurrentStr(){   return $this->currentStr;
       }
       /*
         * 返回分类的类树
       */
       function getTreeStr(){
               return $this->treeStr;
       }

       function setTpl($blockTpl, $elementTpl, $currentTpl, $js){
               $this->blockTpl = $blockTpl;
               $this->elementTpl = $elementTpl;
               $this->currentTpl = $currentTpl;
               $this->js = $js;
       }

       function setImage($open, $close, $line){
               $this->imgOpen    = $open;
                   $this->imgClose = $close;
                   $this->imgLine    = $line;
       }

       function setExpend($expand){
               $this->expand = $expand;
       }

}

//分类的基础数据的样子如下:
$data = array(array('id'=>1, 'name'=>'name1', 'pid'=>0, 'order'=>1),
                           array('id'=>2, 'name'=>'name2', 'pid'=>1, 'order'=>1),
                           array('id'=>3, 'name'=>'name3', 'pid'=>0, 'order'=>1),
                           array('id'=>4, 'name'=>'name4', 'pid'=>3, 'order'=>1),
                           array('id'=>5, 'name'=>'name5', 'pid'=>6, 'order'=>1),
                           array('id'=>6, 'name'=>'name6', 'pid'=>2, 'order'=>1),
                           array('id'=>7, 'name'=>'name7', 'pid'=>6, 'order'=>1),
                           array('id'=>8, 'name'=>'name8', 'pid'=>3, 'order'=>1),
                           array('id'=>9, 'name'=>'name9', 'pid'=>6, 'order'=>1),
                           array('id'=>10, 'name'=>'name10', 'pid'=>0, 'order'=>1),
                           array('id'=>11, 'name'=>'name11', 'pid'=>10, 'order'=>1),
                          array('id'=>12, 'name'=>'name12', 'pid'=>10, 'order'=>1),
                          array('id'=>13, 'name'=>'name13', 'pid'=>10, 'order'=>1),
                          array('id'=>14, 'name'=>'name14', 'pid'=>12, 'order'=>1),
                          array('id'=>15, 'name'=>'name15', 'pid'=>12, 'order'=>4),
                  ); echo "<body bgcolor=\"blue\">";
$tree = new Catagory($data);
echo "<hr>下面是当前分类的类树<hr>";
//$tree->setExpend(1);
$tree->parseNode(0);
//$tree->parseNode(1);
//$tree->expand(9);
echo $tree->getTreeStr();

echo "<hr>下面是当前分类(分类的编号是9)的路径<hr>";
$tree->parseCurrent(9);
echo $tree->getCurrentStr();

|一棵|棵p|ph|hp|p的|的类|类树|树支|支持|持无|无限|限分|分类|类|

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