使用PHP 5.0 轻松解析XML文档

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＞＜br＞"; 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＞＜br＞"; 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)

{

$tag = $this-＞currentNO-＞getSeq();

$this-＞currentNO = $this-＞currentNO-＞getPNodeObject();

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];

}

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 = '＜?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);

}

}

?＞

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＞