Implementation code for parsing php DOMElement and manipulating xml documents

Implementation code for parsing php DOMElement and manipulating xml documents_PHP tutorial

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Release： 2016-07-21 15:11:10

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Copy code The code is as follows:

/*

< Name>Sun Wukong
Sun Xingzhe
123
< ![CDATA[&*$%Special String^&#$&]]>

White Bone Essence
140
Introduction content

*/
$xmldoc = new DOMDocument('1.0', 'UTF-8 ');
$xmldoc->load('datas.xml');

$itemsNodeList = $xmldoc->getElementsbyTagName('Student');
$itemElement = $itemsNodeList->item(0);//Get the first complete student information node
$itemChildsNodeList = $itemElement->getElementsbyTagName('name');//Get the child node "name", there may be multiple names
$itemChildNode = $itemChildsNodeList->item(0);//Get the first name Node
echo $itemChildNode->nodeValue;//Output node value

//Encapsulated into a function
$nodeArr = array('name', 'age', 'introduction');
function getNodeVal($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, 'Student', $nodeArr);
print_r($data);

Copy codeThe code is as follows:

//Add node
$xmldoc = new DOMDocument('1.0', 'UTF-8');
$xmldoc->load('datas.xml');
$items = $xmldoc->getElementsByTagName('Class')->item(0);//Root node
$student = $xmldoc->createElement('Student');//Create a new Student node
$stu_name = $xmldoc->createElement('name','Zhang San');
$stu_age = $xmldoc->createElement('age','15');
$stu_intro = $xmldoc->createElement('Introduction','Strong hands-on ability and stable performance');
$items->appendChild($student);
$student->appendChild($stu_name );
$student->appendChild($stu_age);
$student->appendChild($stu_intro);
$bytes = $xmldoc->save('datas.xml');
echo ($bytes)? "Written: $bytes bytes" : 'Save failed';

//Delete node
$xmldoc = new DOMDocument('1.0', 'UTF-8');
$xmldoc->load('datas.xml');
$student = $xmldoc->getElementsByTagName('Student')->item(2);//Directly find the node to be deleted
$student->parentNode->removeChild($student);//The parent node’s Delete method
$xmldoc->save('datas.xml');

//Modify node value
$student = $xmldoc->getElementsByTagName('student')->item(2);
$student->getElementsByTagName('age')-> item(0)->nodeValue += 10;
$student->setAttribute('id', '110');
$xmldoc->save('datas.xml');

//Apply Xpath to find nodes

$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 class operation xml
/*

1001
200 yuan
Daming
< ;title>Tian Long Ba Bu

1002
< price>321 yuan
Zhang San
Swordsman

< ;book house="People's Publishing House">
1004
182 yuan
李思
Reader

*/
$xml = simplexml_load_file('books.xml');
$books = $xml->book;
echo $books[1]->title . $books[1]['house'];//directly points to the second book
foreach( $xml as $item){
echo $item->title,' ',$item['house'],'
';
}