用php5轻松解析xml

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　　php5|xml

用sax方式的时候,要自己构建3个函数, 而且要直接用这三的函数来返回数据, 要求较强的逻辑. 在处理不同结构的xml的时候, 还要重新进行构造这三个函数,麻烦!

用dom方式,倒是好些,但是他把每个节点都看作是一个node, 操作起来要写好多的代码, 麻烦!

网上有好多的开源的xml解析的类库, 以前看过几个, 但是心里总是觉得不踏实, 感觉总是跟在别人的屁股后面.

这几天在搞java, 挺累的, 所以决定换换脑袋, 写点php代码, 为了防止以后xml解析过程再令我犯难, 就花了一天的时间写了下面一个xml解析的类, 于是就有了下面的东西,

实现方式是通过包装"sax方式的解析结果"来实现的. 总的来说，对于我个人来说挺实用的，性能也还可以，基本上可以完成大多数的处理要求。

功能:
1\ 对基本的xml文件的节点进行 查询 / 添加 / 修改 / 删除 工作.
2\ 导出xml文件的所有数据到一个数组里面.
3\ 整个设计采用了oo方式,在操作结果集的时候, 使用方法类似于dom

缺点:
1\ 每个节点最好都带有一个id(看后面的例子), 每个“节点名字”=“节点的标签_节点的id”，如果这个id值没有设置，程序将自动给他产生一个id，这个id就是这个节点在他的上级节点中的位置编号，从0开始。
2\ 查询某个节点的时候可以通过用“|”符号连接“节点名字”来进行。这些“节点名字”都是按顺序写好的上级节点的名字。

使用说明：
运行下面的例子，在执行结果页面上可以看到函数的使用说明

代码是通过php5来实现的，在php4中无法正常运行。

由于刚刚写完，所以没有整理文档，下面的例子演示的只是一部分的功能，代码不是很难，要是想知道更多的功能，可以研究研究源代码。

目录结构: 

      test.php      test.xml      xml / SimpleDocumentBase.php      xml / SimpleDocumentNode.php      xml / SimpleDocumentRoot.php      xml / SimpleDocumentParser.php
文件:test.xml 
<?xml version="1.0" encoding="GB2312"?>
<shop>
 <name>华联</name>
 <address>北京长安街－9999号</address>
 <desc>连锁超市</desc>
 <cat id="food">
  <goods id="food11">
   <name>food11</name>
   <price>12.90</price>
  </goods>
  <goods id="food12">
   <name>food12</name>
   <price>22.10</price>
   <desc creator="hahawen">好东西推荐</desc>
  </goods>
 </cat>
 <cat>
  <goods id="tel21">
   <name>tel21</name>
   <price>1290</price>
  </goods>
 </cat>
 <cat id="coat">
  <goods id="coat31">
   <name>coat31</name>
   <price>112</price>
  </goods>
  <goods id="coat32">
   <name>coat32</name>
   <price>45</price>
  </goods>
 </cat>
 <special id="hot">
  <goods>
   <name>hot41</name>
   <price>99</price>
  </goods>
 </special>
</shop>
文件:test.php 
<?php

require_once "xml/SimpleDocumentParser.php";
require_once "xml/SimpleDocumentBase.php";
require_once "xml/SimpleDocumentRoot.php";
require_once "xml/SimpleDocumentNode.php";

$test = new SimpleDocumentParser();
$test->parse("test.xml");
$dom = $test->getSimpleDocument();

echo "<pre>";

echo "<hr><font color=red>";
echo "下面是通过函数getSaveData()返回的整个xml数据的数组";
echo "</font><hr>";
print_r($dom->getSaveData());

echo "<hr><font color=red>";
echo "下面是通过setValue()函数，给给根节点添加信息，添加后显示出结果xml文件的内容";
echo "</font><hr>";
$dom->setValue("telphone", "123456789");
echo htmlspecialchars($dom->getSaveXml());

echo "<hr><font color=red>";
echo "下面是通过getNode()函数，返回某一个分类下的所有商品的信息";
echo "</font><hr>";
$obj = $dom->getNode("cat_food");
$nodeList = $obj->getNode();
foreach($nodeList as $node){
$data = $node->getValue();
echo "<font color=red>商品名：".$data[name]."</font>
";
print_R($data);
print_R($node->getAttribute());
}

echo "<hr><font color=red>";
echo "下面是通过findNodeByPath()函数，返回某一商品的信息";
echo "</font><hr>";
$obj = $dom->findNodeByPath("cat_food|goods_food11");
if(!is_object($obj)){
echo "该商品不存在";
}else{
$data = $obj->getValue();
echo "<font color=red>商品名：".$data[name]."</font>
";
print_R($data);
print_R($obj->getAttribute());
}

echo "<hr><font color=red>";
echo "下面是通过setValue()函数，给商品\"food11\"添加属性, 然后显示添加后的结果";
echo "</font><hr>";
$obj = $dom->findNodeByPath("cat_food|goods_food11");
$obj->setValue("leaveword", array("value"=>"这个商品不错", "attrs"=>array("author"=>"hahawen", "date"=>date('Y-m-d'))));
echo htmlspecialchars($dom->getSaveXml());

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)        {         $seq = $this->currentNO->getSeq();
         $this->currentNO = $this->currentNO->getPNodeObject();
         $tag = $this->currentNO->getNodeName($seq);
         if($this->currentAttribute!=null && sizeof($this->currentAttribute)>0)          $this->currentNO->setValue($name, array('value'=>$this->currentValue, 'attrs'=>$this->currentAttribute));         else                $this->currentNO->setValue($name, $this->currentValue);            $this->currentNO->removeNode($tag);        }        else        {      $this->currentNO = (is_a($this->currentNO, 'SimpleDocumentRoot'))? null: $this->currentNO->getPNodeObject();        } } private function characterData($parser, $data) {        $this->currentValue = iconv('UTF-8', 'GB2312', $data); } function __destruct() {     unset($this->domRootObject); }}?>
文件:SimpleDocumentBase.php 
<?php/** *========================================================= * * author     hahawen(大龄青年)   * since      2004-12-04 * copyright  Copyright (c) 2004, NxCoder Group * *========================================================= *//** * abstract class SimpleDocumentBase * base class for xml file parse * all this pachage's is work for xml file, and method is action as DOM. * * 1\ add/update/remove data of xml file. * 2\ explode data to array. * 3\ rebuild xml file * * package SmartWeb.common.xml * abstract * version 1.0 */abstract class SimpleDocumentBase{ private $nodeTag = null; private $attributes = array(); private $values = array(); private $nodes = array();    function __construct($nodeTag)    {        $this->nodeTag = $nodeTag;    }    public function getNodeTag()    {     return $this->nodeTag;    }    public function setValues($values){     $this->values = $values;    }    public function setValue($name, $value)    {     $this->values[$name] = $value;    }    public function getValue($name=null)    {     return $name==null? $this->values: $this->values[$name];    }    public function removeValue($name)    {     unset($this->values["$name"]);    }    public function setAttributes($attributes){        $this->attributes = $attributes;    }    public function setAttribute($name, $value)    {     $this->attributes[$name] = $value;    }    public function getAttribute($name=null)    {        return $name==null? $this->attributes: $this->attributes[$name];    }    public function removeAttribute($name)    {     unset($this->attributes["$name"]);    }    public function getNodesSize()    {        return sizeof($this->nodes);    }    protected function setNode($name, $nodeId)    {     $this->nodes[$name] = $nodeId;    }    public abstract function createNode($name, $attributes);    public abstract function removeNode($name);    public abstract function getNode($name=null);    protected function getNodeId($name=null)    {     return $name==null? $this->nodes: $this->nodes[$name];    }
    public function getNodeName($id)
    {
     $tmp = array_flip($this->nodes);
     return $tmp[$id];
    }    protected function createNodeByName($rootNodeObj, $name, $attributes, $pId)    {        $tmpObject = $rootNodeObj->createNodeObject($pId, $name, $attributes);        $key = isset($attributes[id])? $name.'_'.$attributes[id]: $name.'_'.$this->getNodesSize();        $this->setNode($key, $tmpObject->getSeq());     return $tmpObject;    }    protected function removeNodeByName($rootNodeObj, $name)    {        $rootNodeObj->removeNodeById($this->getNodeId($name));        if(sizeof($this->nodes)==1)            $this->nodes = array();     else      unset($this->nodes[$name]);    }    protected function getNodeByName($rootNodeObj, $name=null)    {     if($name==null)     {            $tmpList = array();            $tmpIds = $this->getNodeId();            foreach($tmpIds as $key=>$id)             $tmpList[$key] = $rootNodeObj->getNodeById($id);            return $tmpList;     }     else     {      $id = $this->getNodeId($name);      if($id===null)      {             $tmpIds = $this->getNodeId();             foreach($tmpIds as $tkey=>$tid)             {              if(strpos($key, $name)==0)              {               $id = $tid;               break;              }             }      }      return $rootNodeObj->getNodeById($id);     }    }    public function findNodeByPath($path)    {     $pos = strpos($path, '|');     if($pos<=0)     {      return $this->getNode($path);        }        else        {         $tmpObj = $this->getNode(substr($path, 0, $pos));         return is_object($tmpObj)? $tmpObj->findNodeByPath(substr($path, $pos+1)): null;        }    }    public function getSaveData()    {        $data = $this->values;        if(sizeof($this->attributes)>0)         $data[attrs] = $this->attributes;        $nodeList = $this->getNode();        if($nodeList==null)         return $data;        foreach($nodeList as $key=>$node)        {         $data[$key] = $node->getSaveData();        }     return $data;    }    public function getSaveXml($level=0)    {     $prefixSpace = str_pad("", $level, "\t");     $str = "$prefixSpace<$this->nodeTag";        foreach($this->attributes as $key=>$value)         $str .= " $key=\"$value\"";        $str .= ">\r\n";        foreach($this->values as $key=>$value){            if(is_array($value))            {                $str .= "$prefixSpace\t<$key";                foreach($value[attrs] as $attkey=>$attvalue)                 $str .= " $attkey=\"$attvalue\"";                $tmpStr = $value[value];            }            else            {             $str .= "$prefixSpace\t<$key";             $tmpStr = $value;            }            $tmpStr = trim(trim($tmpStr, "\r\n"));            $str .= ($tmpStr===null || $tmpStr==="")? " />\r\n": ">$tmpStr</$key>\r\n";        }        foreach($this->getNode() as $node)         $str .= $node->getSaveXml($level+1)."\r\n";     $str .= "$prefixSpace</$this->nodeTag>";     return $str;    }    function __destruct()    {     unset($this->nodes, $this->attributes, $this->values);    }}?>
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 = ''; 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);    }}?>
下面是例子运行对结果: 
下面是通过函数getSaveData()返回的整个xml数据的数组
Array(    [name] => 华联    [address] => 北京长安街－9999号    [desc] => 连锁超市    [cat_food] => Array        (            [attrs] => Array                (                    [id] => food                )            [goods_food11] => Array                (                    [name] => food11                    [price] => 12.90                    [attrs] => Array                        (                            [id] => food11                        )                )            [goods_food12] => Array                (                    [name] => food12                    [price] => 22.10                    [desc] => Array                        (                            [value] => 好东西推荐                            [attrs] => Array                                (                                    [creator] => hahawen                                )                        )                    [attrs] => Array                        (                            [id] => food12                        )                )        )    [cat_1] => Array        (            [goods_tel21] => Array                (                    [name] => tel21                    [price] => 1290                    [attrs] => Array                        (                            [id] => tel21                        )                )        )    [cat_coat] => Array        (            [attrs] => Array                (                    [id] => coat                )            [goods_coat31] => Array                (                    [name] => coat31                    [price] => 112                    [attrs] => Array                        (                            [id] => coat31                        )                )            [goods_coat32] => Array                (                    [name] => coat32                    [price] => 45                    [attrs] => Array                        (                            [id] => coat32                        )                )        )    [special_hot] => Array        (            [attrs] => Array                (                    [id] => hot                )            [goods_0] => Array                (                    [name] => hot41                    [price] => 99                )        ))
下面是通过setValue()函数，给给根节点添加信息，添加后显示出结果xml文件的内容
<?xml version="1.0" encoding="GB2312" ?><shop> <name>华联</name> <address>北京长安街－9999号</address> <desc>连锁超市</desc> <telphone>123456789</telphone> <cat id="food">  <goods id="food11">   <name>food11</name>   <price>12.90</price>  </goods>  <goods id="food12">   <name>food12</name>   <price>22.10</price>   <desc creator="hahawen">好东西推荐</desc>  </goods> </cat> <cat>  <goods id="tel21">   <name>tel21</name>   <price>1290</price>  </goods> </cat> <cat id="coat">  <goods id="coat31">   <name>coat31</name>   <price>112</price>  </goods>  <goods id="coat32">   <name>coat32</name>   <price>45</price>  </goods> </cat> <special id="hot">  <goods>   <name>hot41</name>   <price>99</price>  </goods> </special></shop>
下面是通过getNode()函数，返回某一个分类下的所有商品的信息
商品名：food11
Array(    [name] => food11    [price] => 12.90)Array(    [id] => food11)商品名：food12
Array(    [name] => food12    [price] => 22.10    [desc] => Array        (            [value] => 好东西推荐            [attrs] => Array                (                    [creator] => hahawen                )        ))Array(    [id] => food12)
下面是通过findNodeByPath()函数，返回某一商品的信息
商品名：food11
Array(    [name] => food11    [price] => 12.90)Array(    [id] => food11)
下面是通过setValue()函数，给商品"food11"添加属性, 然后显示添加后的结果
<?xml version="1.0" encoding="GB2312" ?><shop> <name>华联</name> <address>北京长安街－9999号</address> <desc>连锁超市</desc> <telphone>123456789</telphone> <cat id="food">  <goods id="food11">   <name>food11</name>   <price>12.90</price>   <leaveword author="hahawen" date="2004-12-05">这个商品不错</leaveword>  </goods>  <goods id="food12">   <name>food12</name>   <price>22.10</price>   <desc creator="hahawen">好东西推荐</desc>  </goods> </cat> <cat>  <goods id="tel21">   <name>tel21</name>   <price>1290</price>  </goods> </cat> <cat id="coat">  <goods id="coat31">   <name>coat31</name>   <price>112</price>  </goods>  <goods id="coat32">   <name>coat32</name>   <price>45</price>  </goods> </cat> <special id="hot">  <goods>   <name>hot41</name>   <price>99</price>  </goods> </special></shop>
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
<?xml version="1.0" encoding="GB2312" ?><shop> <name>华联</name> <address>北京长安街－9999号</address> <desc>连锁超市</desc> <telphone>123456789</telphone> <cat id="food">  <goods id="food11">   <name>food11</name>   <price>12.90</price>   <leaveword author="hahawen" date="2004-12-05">这个商品不错</leaveword>  </goods>  <goods id="food12">   <name>new food12</name>   <price>22.10</price>  </goods> </cat> <cat>  <goods id="tel21">   <name>tel21</name>   <price>1290</price>  </goods> </cat> <cat id="coat">  <goods id="coat31">   <name>coat31</name>   <price>112</price>  </goods>  <goods id="coat32">   <name>coat32</name>   <price>45</price>  </goods> </cat> <special id="hot">  <goods>   <name>hot41</name>   <price>99</price>  </goods> </special></shop>
下面是通过createNode()函数，添加商品, 然后显示添加后的结果
<?xml version="1.0" encoding="GB2312" ?><shop> <name>华联</name> <address>北京长安街－9999号</address> <desc>连锁超市</desc> <telphone>123456789</telphone> <cat id="food">  <goods id="food11">   <name>food11</name>   <price>12.90</price>   <leaveword author="hahawen" date="2004-12-05">这个商品不错</leaveword>  </goods>  <goods id="food12">   <name>new food12</name>   <price>22.10</price>  </goods>  <goods id="food13">   <name>food13</name>   <price>100</price>  </goods> </cat> <cat>  <goods id="tel21">   <name>tel21</name>   <price>1290</price>  </goods> </cat> <cat id="coat">  <goods id="coat31">   <name>coat31</name>   <price>112</price>  </goods>  <goods id="coat32">   <name>coat32</name>   <price>45</price>  </goods> </cat> <special id="hot">  <goods>   <name>hot41</name>   <price>99</price>  </goods> </special></shop>
下面是通过removeNode()函数，删除商品, 然后显示删除后的结果
<?xml version="1.0" encoding="GB2312" ?><shop> <name>华联</name> <address>北京长安街－9999号</address> <desc>连锁超市</desc> <telphone>123456789</telphone> <cat id="food">  <goods id="food11">   <name>food11</name>   <price>12.90</price>   <leaveword author="hahawen" date="2004-12-05">这个商品不错</leaveword>  </goods>  <goods id="food13">   <name>food13</name>   <price>100</price>  </goods> </cat> <cat>  <goods id="tel21">   <name>tel21</name>   <price>1290</price>  </goods> </cat> <cat id="coat">  <goods id="coat31">   <name>coat31</name>   <price>112</price>  </goods>  <goods id="coat32">   <name>coat32</name>   <price>45</price>  </goods> </cat> <special id="hot">  <goods>   <name>hot41</name>   <price>99</price>  </goods> </special></shop>

					

			
      
    
	
		
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 上一篇用“类”来代替“递归方法”，用php举例。   
      
 下一篇php页面访问时，统一进行权限验证的设计   
    
    
      
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