Last updated: Fri, 30 Oct 2009

The DOMXPath class

Einführung

Supports XPath 1.0

Klassenbeschreibung

DOMXPath

DOMXPath {

/* Properties */

public DOMDocument $document ;

/* Methods */

__construct ( DOMDocument $doc )

mixed evaluate ( string $expression [, DOMNode $contextnode ] )

DOMNodeList query ( string $expression [, DOMNode $contextnode ] )

bool registerNamespace ( string $prefix , string $namespaceURI )

public void registerPhpFunctions ([ mixed $restrict ] )

}

Eigenschaften

document: Prop description

Inhaltsverzeichnis

DOMXPath::__construct — Creates a new DOMXPath object
DOMXPath::evaluate — Evaluates the given XPath expression and returns a typed result if possible.
DOMXPath::query — Evaluates the given XPath expression
DOMXPath::registerNamespace — Registers the namespace with the DOMXPath object
DOMXPath::registerPhpFunctions — Register PHP functions as XPath functions

DOMXPath::__construct

DOMText::splitText

Last updated: Fri, 30 Oct 2009

add a note User Contributed Notes
DOMXPath

david at lionhead dot nl
11-Aug-2009 01:33


When using DOMXPath and having a default namespace. Consider using an intermediate function to add the default namespace to all queries:





<?php


// The default namespace: x:xmlns="http://..."


$path="/Book/Title";


$path=preg_replace("\/([a-zA-Z])","/x:$1",$path);





// Result: /x:Book/x:Title


?>

ahsdg at NOSPAM dot pochta dot ru
22-Mar-2009 11:39


For more then one search this function will be helpfull:



<?php

class xpathExtension{

   public static function getNodes($domDoc, $xpathString) {

        $xp = new DOMXPath($domDoc);

        $xp->registerNamespace('x', 'http://www.w3.org/1999/xhtml');

        $xp->registerNamespace('xhtml', 'http://www.w3.org/1999/xhtml');

        $xp->registerNamespace('i18n', 'http://apache.org/cocoon/i18n/2.1');



        $ret = array();

        $nodes = $xp->query($xpathString);

        foreach ($nodes as $node) {

            array_push($ret, $node);

        }

        return $ret;

    }

}



$domDoc = new DOMDocument();

$domDoc->load("xmlFile.xml");

$xpathString = "//html/body/*[@class='text']";

$domNodeList = xpathExtension::getNodes($domDoc, $xpathString);

foreach($domNodeList as $domNode){

   echo $domNode->nodeName;

}

?>



Thanks to:

https://svn.liip.ch/repos/public/okapi/core/trunk/inc/api/helpers/

xpath.php

Mark Omohundro, ajamyajax dot com
14-Dec-2008 05:15


<?php

// to retrieve selected html data, try these DomXPath examples:



$file = $DOCUMENT_ROOT. "test.html";

$doc = new DOMDocument();

$doc->loadHTMLFile($file);



$xpath = new DOMXpath($doc);



// example 1: for everything with an id

//$elements = $xpath->query("//*[@id]");



// example 2: for node data in a selected id

//$elements = $xpath->query("/html/body/div[@id='yourTagIdHere']");



// example 3: same as above with wildcard

$elements = $xpath->query("*/div[@id='yourTagIdHere']");



if (!is_null($elements)) {

  foreach ($elements as $element) {

    echo "<br/>[". $element->nodeName. "]";



    $nodes = $element->childNodes;

    foreach ($nodes as $node) {

      echo $node->nodeValue. "\n";

    }

  }

}

?>

add a note

DOMXPath::__construct

DOMText::splitText

Last updated: Fri, 30 Oct 2009