用 PHP5 轻松解析 XML

echo "<hr><font color=red>";
echo "下面是通过removeValue()/removeAttribute()函数，给商品"food11"改变和删除属性, 然后显示操作后的结果";
echo "</font><hr>";
$obj = $dom->findNodeByPath("cat_food|goods_food12");
$obj->setValue("name", "new food12");
$obj->removeValue("desc");
echo htmlspecialchars($dom->getSaveXml());

echo "<hr><font color=red>";
echo "下面是通过createNode()函数，添加商品, 然后显示添加后的结果";
echo "</font><hr>";
$obj = $dom->findNodeByPath("cat_food");
$newObj = $obj->createNode("goods", array("id"=>"food13"));
$newObj->setValue("name", "food13");
$newObj->setValue("price", 100);
echo htmlspecialchars($dom->getSaveXml());

echo "<hr><font color=red>";
echo "下面是通过removeNode()函数，删除商品, 然后显示删除后的结果";
echo "</font><hr>";
$obj = $dom->findNodeByPath("cat_food");
$obj->removeNode("goods_food12");
echo htmlspecialchars($dom->getSaveXml());

?>

文件:SimpleDocumentParser.php

<?php
/**
 *================================================
 * 
 * @author     hahawen(大龄青年) 

 * @since      2004-12-04
 * @copyright  Copyright (c) 2004, NxCoder Group 
 *
 *================================================
 */
 /**
 * class SimpleDocumentParser
 * use SAX parse xml file, and build SimpleDocumentObject 
 * all this pachage's is work for xml file, and method is action as DOM.
 *
 * @package SmartWeb.common.xml
 * @version 1.0
 */
 class SimpleDocumentParser
 {

     private $domRootObject = null;

     private $currentNO = null;
     private $currentName  = null;
     private $currentValue = null;
     private $currentAttribute = null;

     public
     function getSimpleDocument()
     {
         return $this->domRootObject;
     }

     public function parse($file)
     {
         $xmlParser = xml_parser_create();
         xml_parser_set_option($xmlParser,XML_OPTION_CASE_FOLDING,
         0);
         xml_parser_set_option($xmlParser,XML_OPTION_SKIP_WHITE, 1);
         xml_parser_set_option($xmlParser,
         XML_OPTION_TARGET_ENCODING, 'UTF-8');
         xml_set_object($xmlParser, $this);

         xml_set_element_handler($xmlParser, "startElement", "endElement");
         xml_set_character_data_handler($xmlParser,
         "characterData");

         if (!xml_parse($xmlParser, file_get_contents($file)))

         die(sprintf("XML error: %s at line %d", xml_error_string(xml_get_error_code($xmlParser)),
         xml_get_current_line_number($xmlParser)));

         xml_parser_free($xmlParser);

     }

     private function startElement($parser, $name, $attrs)
     {
         $this->currentName = $name;
         $this->currentAttribute = $attrs;
         if($this->currentNO == null)
         {
             $this->domRootObject = new SimpleDocumentRoot($name);

             $this->currentNO = $this->domRootObject;
         }
         else
         {
             $this->currentNO = $this->currentNO->createNode($name, $attrs);

         }
     }

     private function endElement($parser, $name)
     {
         if($this->currentName==$name)

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