php中操作xml文档程序代码

/*
<?xml version="1.0" encoding="UTF-8"?>
<班级>
<学生 number="101">
<名字>孙悟空</名字>
<名字>孙行者</名字>
<年龄>猴精猴精</年龄>
<介绍></介绍>
</学生>
<学生 number="102">
<名字>白骨精</名字>
<年龄>140</年龄>
<介绍>幻化万千</介绍>
</学生>
<学生 number="103">
<名字>猪八戒</名字>
<名字>猪无能</名字>
<年龄>200</年龄>
<介绍>能吃会睡</介绍>
</学生>
</班级>
*/

class xmlDom{
    public $version;
    public $encoding;
    private $xml;
    private $items;
    private $seachNode = '';
    private $seachItem = '';
    private $seachValue = '';
    public $writeBytes = 0;

    function __construct($xmlFile ='', $version ='1.0', $encoding = 'UTF-8'){
        $this->version = $version;
        $this->encoding = $encoding;
        $this->xml = new DOMDocument($version, $encoding);
        if($xmlFile)$this->xml->load($xmlFile);
    }
    function getRootEle($rootTag){
        $this->xmlRoot = $this->xml->getElementsByTagName($rootTag)->item(0);
    }
    function getSeachItem($itemsTag, $seachNode, $seachValue){
        $this->items = $this->xml->getElementsByTagName($itemsTag);
        $this->items->length;
        for($i=0; $i<$this->items->length; $i++){
            $item = $this->items->item($i);//元素
            $node = $item->getElementsByTagName($seachNode);//节点
            for($j = 0; $j< $node->length; $j++){
                $subNode = $node->item($j);
                if($seachValue == $subNode->nodeValue){
                    $this->seachNode = $subNode;
                    $this->seachItem = $item;
                    $this->seachValue = $subNode->nodeValue;
                    break(2);
                }
            }
        }
        return ($this->seachNode) ? true : false;
    }
   
    function update($nodeValue, $nodeTag = '',$append = false, $index = 0){
        if($append){
            if($nodeTag)
                $this->seachItem->getElementsByTagName($nodeTag)->item($index)->nodeValue += $nodeValue;
            else
                $this->seachNode->nodeValue += $nodeValue;
        }else{
            if($nodeTag)
                $this->seachItem->getElementsByTagName($nodeTag)->item($index)->nodeValue = $nodeValue;
            else
                $this->seachNode->nodeValue = $nodeValue;
        }
    }
   
    function save($filename){
        $this->writeBytes = $this->xml->save($filename);
        return ($this->writeBytes) ? true : false;
    }
}

$test = new xmlDom('student.xml');
$test->getSeachItem('学生','年龄','103');//找到 年龄=103 的猪八戒
$test->update('小猪猪', '名字', false, 1); //把猪八戒的第二个名字改成：小猪猪
$test->save('new.xml'); //保存成新文件

<?php
$xml = simplexml_load_file(’example.xml’); //创建 SimpleXML对象
print_r($xml);         //输出 XML
?>

<?php
/**
* to show <title lang="en"><![CDATA[Site Title]]></title>   instead of <title lang="en">Site Title</title>
*
*/
class SimpleXMLExtended extends SimpleXMLElement
  {
  public function addCData($cdata_text)
    {
    $node = dom_import_simplexml($this);
    $no   = $node->ownerDocument;
    $node->appendChild($no->createCDATASection($cdata_text));
    }
  }
$xmlFile    = 'config.xml';
// instead of $xml = new SimpleXMLElement('<sites/>');
$xml = new SimpleXMLExtended('<sites/>');
$site = $xml->addChild('site');
// instead of $site->addChild('site', 'Site Title');
$site->title = NULL; // VERY IMPORTANT! We need a node where to append
$site->title->addCData('Site Title');
$site->title->addAttribute('lang', 'en');
$xml->asXML($xmlFile);
?>

$arr[] = array(

'name' => $row['name'],

'sex' => $row['sex'],

'age' => $row['age']

);

$doc = new DOMDocument('1.0', 'utf-8'); // 声明版本和编码

$doc->formatOutput = true;
$r = $doc->createElement("root");

$doc->appendChild($r);
foreach ($arr as $dat) {

$b = $doc->createElement("data");
$name = $doc->createElement("name");

$name->appendChild($doc->createTextNode($dat['name']));

$b->appendChild($name);
$sex = $doc->createElement("sex");

$sex->appendChild($doc->createTextNode($dat['sex']));

$b->appendChild($sex);

$age = $doc->createElement("age");

$age->appendChild($doc->createTextNode($dat['age']));

$b->appendChild($age);

$r->appendChild($b);

}
echo $doc->saveXML();

header("Content-type:text/html; Charset=utf-8");

$url = "createXML.php";

$reader = new XMLReader(); //实例化XMLReader

$reader->open($url); //获取xml

$i=1;

while ($reader->read()) {

if ($reader->nodeType == XMLReader::TEXT) { //判断node类型

$m = $i%3;

if($m==1)

$name = $reader->value; //读取node值

if($m==2)

$sex = $reader->value;

if($m==0){

$age = $reader->value;

$arr[] = array(

'name' => $name,

'sex' => $sex,

'age' => $age

);

}

$i++;

}

}

//print_r($arr);

<?php

//Store your html into $html variable.

$html="<html>
<head>
<title>Rakesh Verma</title>
</head>

<body>
    <a href='http://example.com'>Example</a>
    <a href='http://google.com'>Google</a>
    <a href='http://www.yahoo.com'>Yahoo</a>
</body>

</html>";

$dom = new DOMDocument();
$dom->loadHTML($html);

//Evaluate Anchor tag in HTML
$xpath = new DOMXPath($dom);
$hrefs = $xpath->evaluate("/html/body//a");

for ($i = 0; $i < $hrefs->length; $i++) {
        $href = $hrefs->item($i);
        $url = $href->getAttribute('href');

        //remove and set target attribute       
        $href->removeAttribute('target');
        $href->setAttribute("target", "_blank");

        $newURL=$url.".au";

        //remove and set href attribute       
        $href->removeAttribute('href');
        $href->setAttribute("href", $newURL);
}

// save html
$html=$dom->saveHTML();

echo $html;

?>

/*<?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <!-- css的样式定义，不加点。如：name{color:red;} -->
<?xml-stylesheet type="text/css" href="css.css"?>
<!-- 引入dtd文档定义文件 （根元素：班级）<!DOCTYPE 班级 SYSTEM "class.dtd" /> -->
<!-- <!DOCTYPE 班级[
<!ELEMENT 班级 (学生+)>
<!ELEMENT 学生 (名字,年龄,介绍)>
<!ELEMENT 名字 (#PCDATA)>
<!ELEMENT 年龄 (#PCDATA)>
<!ELEMENT 介绍 (#PCDATA)>
] /> -->
<班级>
<学生 number="101">
<名字>孙悟空</名字>
<名字>孙行者</名字>
<年龄>123</年龄>
<介绍><![CDATA[&*$%特殊字串^&#$&]]></介绍>
</学生>

<学生 number="10&quot;2">
<名字>白骨精</名字>
<年龄>140</年龄>
<介绍>介绍内容</介绍>
</学生>
</班级>
*/
$xmldoc = new DOMDocument('1.0', 'UTF-8');
$xmldoc->load('datas.xml');

$itemsNodeList = $xmldoc->getElementsbyTagName('学生');
$itemElement = $itemsNodeList->item(0);//得到第一个完整的学生信息节点
$itemChildsNodeList = $itemElement->getElementsbyTagName('名字');//得到子节点“名字”，也许有多个名字
$itemChildNode = $itemChildsNodeList->item(0);//得到第一个名字节点
echo $itemChildNode->nodeValue;//输出节点值

//封装成函数
$nodeArr = array('名字', '年龄', '介绍');
function getNodeVal($xmldoc, $itemsName, $nodeArr){
    $items = $xmldoc->getElementsByTagName($itemsName);
     for($i=0; $i < $items->length; $i++){
        $item = $items->item($i);
        foreach($nodeArr as $node){
            $data[$i][] = $item->getElementsByTagName($node)->item(0)->nodeValue;
        }
    }
    return $data;
}

$data = getNodeVal($xmldoc, '学生', $nodeArr);
print_r($data);

function xmlToArr ($xml, $root = true) {

  if (!$xml->children()) {
   return (string) $xml;
  }
  $array = array();
  foreach ($xml->children() as $element => $node) {
   $totalElement = count($xml->{$element});
   if (!isset($array[$element])) {
    $array[$element] = "";
   }
   // Has attributes
   if ($attributes = $node->attributes()) {
    $data = array(
     'attributes' => array(),
     'value' => (count($node) > 0) ? $this->__xmlToArr($node, false)

: (string) $node
    );
    foreach ($attributes as $attr => $value) {
     $data['attributes'][$attr] = (string) $value;
    }
    if ($totalElement > 1) {
     $array[$element][] = $data;
    } else {
     $array[$element] = $data;
    }
   // Just a value
   } else {
    if ($totalElement > 1) {
     $array[$element][] = $this->__xmlToArr($node, false);
    } else {
     $array[$element] = $this->__xmlToArr($node, false);
    }
   }
  }
  if ($root) {
   return array($xml->getName() => $array);
  } else {
   return $array;
  }

 }