用 PHP5 轻松解析 XML_php教程-查字典教程网

用 PHP5 轻松解析 XML

摘要：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...

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>

<address>北京长安街－9999号</address>

</goods>

<desc creator="hahawen">好东西推荐</desc>

</goods>

</cat>

<cat>

</goods>

</cat>

</goods>

</goods>

</cat>

<goods>

</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

*================================================

/**

* 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;

} publicfunction 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

*=================================================

/**

* 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 .= ">rn";

foreach($this->values as $key=>$value){ if(is_array($value))

{

$str .= "$prefixSpacet<$key"; foreach($value[attrs] as $attkey=>$attvalue) $str .= " $attkey="$attvalue""; $tmpStr = $value[value];

}

else {

$str .= "$prefixSpacet<$key"; $tmpStr = $value;

}

$tmpStr = trim(trim($tmpStr, "rn")); $str .= ($tmpStr===null || $tmpStr==="")? " />rn": ">$tmpStr</$key>rn"; } foreach($this->getNode() as $node)

$str .= $node->getSaveXml($level+1)."rn";

$str .= "$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

*==============================================

/**

* 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."rn";

return $str.parent::getSaveXml(0);

}

?> 文件:SimpleDocumentNode.php <?php

/**

*===============================================

* @author hahawen(大龄青年)

* @since 2004-12-04

*===============================================

/**

* 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>

<address>北京长安街－9999号</address>

</goods>

<desc creator="hahawen">好东西推荐</desc>

</goods>

</cat>

<cat>

</goods>

</cat>

</goods>

</goods>

</cat>

<goods>

</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>

<address>北京长安街－9999号</address>

<leaveword author="hahawen" date="2004-12-05">这个商品不错</leaveword>

</goods>

<desc creator="hahawen">好东西推荐</desc>

</goods>

</cat>

<cat>

</goods>

</cat>

</goods>

</goods>

</cat>

<goods>

</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>

<address>北京长安街－9999号</address>

<leaveword author="hahawen" date="2004-12-05">这个商品不错</leaveword>

</goods>

</goods>

</cat>

<cat>

</goods>

</cat>

</goods>

</goods>

</cat>

<goods>

</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>

<address>北京长安街－9999号</address>

<leaveword author="hahawen" date="2004-12-05">这个商品不错</leaveword>

</goods>

</goods>

</goods>

</cat>

<cat>

</goods>

</cat>

</goods>

</goods>

</cat>

<goods>

</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>

<address>北京长安街－9999号</address>

<leaveword author="hahawen" date="2004-12-05">这个商品不错</leaveword>

</goods>

</goods>

</cat>

<cat>

</goods>

</cat>

</goods>

</goods>

</cat>

<goods>

</goods>

</special>

</shop>

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