编程语言：用php5轻松解析xml

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用php5轻松解析xml

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文章来源http://blog.csdn.net/hahawen, 转载请注明出处,谢谢

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

echo "<hr>";
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 "<hr>";
$dom->setValue("telphone", "123456789");
echo htmlspecialchars($dom->getSaveXml());

echo "<hr>";
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 "<hr>";
$obj = $dom->getNode("cat_food");
$nodeList = $obj->getNode();
foreach($nodeList as $node){
$data = $node->getValue();
echo "商品名：".$data[name]." ";
print_R($data);
print_R($node->getAttribute());
}

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

echo "<hr>";
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 "<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>";
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 "<hr>";
$obj = $dom->findNodeByPath("cat_food|goods_food12");
$obj->setValue("name", "new food12");
$obj->removeValue("desc");
echo htmlspecialchars($dom->getSaveXml());

echo "<hr>";
echo "下面是通过createNode()函数，添加商品, 然后显示添加后的结果";
echo "<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>";
echo "下面是通过removeNode()函数，删除商品, 然后显示删除后的结果";
echo "<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 * *========================================================= */ /** * 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]; } 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

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