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Homephp教程php手册解析php DOMElement 操作xml 文档的实现代码

解析php DOMElement 操作xml 文档的实现代码

Jun 13, 2016 am 11:53 AM
ENCphpxmlcodecopyaccomplishoperatedocumentofparse

复制代码 代码如下:


/*
 





孙悟空名字>
孙行者名字>
123年龄>
介绍>
学生>


白骨精名字>
140年龄>
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 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);


复制代码 代码如下:


//添加节点
$xmldoc = new DOMDocument('1.0', 'UTF-8');
$xmldoc->load('datas.xml');
$items = $xmldoc->getElementsByTagName('班级')->item(0);//根节点
$student =  $xmldoc->createElement('学生');//创建一个新的学生节点
$stu_name = $xmldoc->createElement('名字','张三');
$stu_age = $xmldoc->createElement('年龄','15');
$stu_intro = $xmldoc->createElement('介绍','动手能力强且成绩稳定');
$items->appendChild($student);
$student->appendChild($stu_name);
$student->appendChild($stu_age);
$student->appendChild($stu_intro);
$bytes = $xmldoc->save('datas.xml');
echo ($bytes)? "写入了: $bytes 字节" : '保存失败';

//删除节点
$xmldoc = new DOMDocument('1.0', 'UTF-8');
$xmldoc->load('datas.xml');
$student = $xmldoc->getElementsByTagName('学生')->item(2);//直接找到要删除的节点
$student->parentNode->removeChild($student);//父节点的删除方法
$xmldoc->save('datas.xml');

//修改节点值
$student = $xmldoc->getElementsByTagName('学生')->item(2);
$student->getElementsByTagName('年龄')->item(0)->nodeValue += 10;
$student->setAttribute('id', '110');
$xmldoc->save('datas.xml');

//应用 Xpath 查找节点

$xml = new DOMDocument('1.0', 'UTF-8');
$xml->load('dat.xml');
$xpath = new DOMXPath($xml);
$nodeList = $xpath->query('/aaa/bbb/ddd/fff');
echo $nodeList->item(0)->nodeValue;

//SimpleXML 类操作 xml
/*



1001
200元
大明
天龙八部


1002
321元
张三
笑傲江湖


1004
182元
李四
读者


*/
$xml = simplexml_load_file('books.xml');
$books = $xml->book;
echo $books[1]->title . $books[1]['house'];//直接指向第二本书
foreach($xml as $item){
    echo $item->title,' ',$item['house'],'
';
}

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