用PHP 5.0 轻松解析XML文档（3）

文件:SimpleDocumentRoot.php
＜?php
/**
*=========================================================
*
* @author     hahawen(大龄青年)  
* @since      2004-12-04
* @copyright  Copyright (c) 2004, NxCoder Group
*
*=========================================================
*/
/**
* class SimpleDocumentRoot
* xml root class, include values/attributes/subnodes.
* all this pachage's is work for xml file, and method is action as DOM.
*
* @package SmartWeb.common.xml
* @version 1.0
*/
class SimpleDocumentRoot extends SimpleDocumentBase
{
private $prefixStr = '＜?xml version="1.0" encoding="utf-8" ?＞';
private $nodeLists = array();
function __construct($nodeTag)
{
        parent::__construct($nodeTag);
}
    public function createNodeObject($pNodeId, $name, $attributes)
    {
     $seq = sizeof($this-＞nodeLists);
     $tmpObject = new SimpleDocumentNode($this, $pNodeId, $name, $seq);
     $tmpObject-＞setAttributes($attributes);
     $this-＞nodeLists[$seq] = $tmpObject;
     return $tmpObject;
    }
    public function removeNodeById($id)
    {
        if(sizeof($this-＞nodeLists)==1)
            $this-＞nodeLists = array();
     else
      unset($this-＞nodeLists[$id]);
    }
    public function getNodeById($id)
    {
     return $this-＞nodeLists[$id];
    }
    public function createNode($name, $attributes)
    {
        return $this-＞createNodeByName($this, $name, $attributes, -1);
    }
    public function removeNode($name)
    {
        return $this-＞removeNodeByName($this, $name);
    }
    public function getNode($name=null)
    {
        return $this-＞getNodeByName($this, $name);
    }
    public function getSaveXml()
    {
     $prefixSpace = "";
     $str = $this-＞prefixStr."\r\n";
     return $str.parent::getSaveXml(0);
    }
}
?＞
      　　
　　文件:SimpleDocumentNode.php
＜?php
/**
*=========================================================
*
* @author     hahawen(大龄青年)  
* @since      2004-12-04
* @copyright  Copyright (c) 2004, NxCoder Group
*
*=========================================================
*/
/**
* class SimpleDocumentNode
* xml Node class, include values/attributes/subnodes.
* all this pachage's is work for xml file, and method is action as DOM.
*
* @package SmartWeb.common.xml
* @version 1.0
*/
class SimpleDocumentNode extends SimpleDocumentBase
{
private $seq = null;
private $rootObject = null;
    private $pNodeId = null;
    function __construct($rootObject, $pNodeId, $nodeTag, $seq)
    {
     parent::__construct($nodeTag);
        $this-＞rootObject = $rootObject;
        $this-＞pNodeId = $pNodeId;
        $this-＞seq = $seq;
    }
    public function getPNodeObject()
    {
     return ($this-＞pNodeId==-1)? $this-＞rootObject: $this-＞rootObject-＞getNodeById($this-＞pNodeId);
    }
    public function getSeq(){
     return $this-＞seq;
    }
    public function createNode($name, $attributes)
    {
        return $this-＞createNodeByName($this-＞rootObject, $name, $attributes, $this-＞getSeq());
    }
    public function removeNode($name)
    {
        return $this-＞removeNodeByName($this-＞rootObject, $name);
    }
    public function getNode($name=null)
    {
        return $this-＞getNodeByName($this-＞rootObject, $name);
    }
}
?＞