PHP Operation XML

First, PHP DOM

1. Main categories:

DOMDocument: Document Class--$dom->new DOMDocument (' 1.0 ', ' gb2312 ')

Domnodelist: Node List class--$dom->getelementsbytagname (")

DomElement: Element Class--$dom->getelementsbytagname (")->item (0); $dom->documentelement (Root node)

Domnode: Node class

node additions and deletions change (To find the parent node first)

$dom->load (' Aa.xml ')

$dom->createelement (' name ' [, ' value ']);

$son = $dom->createcdatasection (");

$parent->appendchild ($son);

$parent->removechild ($son);--delete node

$parent->replacechild ($new, $old);--replace node

$dom->savexml (' Aa.xml ')

$dom->save (' Aa.xml ')

Property manipulation

$element->setattribute (' name ', ' value '); Add or modify property values

$element->getattribute (' name ');--Get the value of the property

$element->hasattribute (' name ');--to determine if there is a property

$element->removeattribute (' name ')--delete attribute

Second, SimpleXML

The returned XML variable is an instance of the SimpleXMLElement class//This object represents the root element in the XML $xml=simplexml_load_file (' Demo05.xml '); Echo $xml->person[1] ->name. ' <br> '; Echo $xml->person[1]->age. ' <br> ';

　　

$xml =simplexml_load_file (' demo05.xml ');
$xml->children ();--represents all child nodes of the root node

To add a node:

$person = $xml->addchild (' person ');

$person->addchild (' name ', ' Tom ');

$person->addchild (' Age ', ' 29 ');

$xml->asxml (' demo05.xml ');

Add Property

$xml =simplexml_load_file (' demo05.xml ');//Add the id attribute to the 3rd person with a value of P103$xml->person[2]->addattribute (' id ', ' p103 '); $ Xml->asxml (' Demo05.xml ');

　　

Third, XPATH

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