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PHP XML

PHP XML Contents

PHP DOMText Function splitText
PHP DOMText Function isWhitespaceInElementContent
PHP DOMNode Function replaceChild
PHP DOMNode Function lookupPrefix
PHP DOMNode Function lookupNamespaceURI
PHP DOMNode Function isSupported
PHP DOMNode Function isSameNode
PHP DOMNode Function insertBefore
PHP DOMNode Function hasChildNodes
PHP DOMNode Function hasAttributes
PHP DOMNode Function cloneNode
PHP DOMNodelist Function item
PHP DOMNamedNodeMap Function item
PHP DOMNamedNodeMap Function getNamedItemNS
PHP DOMNamedNodeMap Function getNamedItem
PHP DOMImplementation Function hasFeature
PHP DOMImplementation Function createDocumentType
PHP DOMImplementation Function createDocument
PHP DOMElement Function removeAttributeNS
PHP DOMElement Function removeAttributeNode
 
 
By :Mark Wilson
I am the creator of TopXML. I am available for international and local (Australia) contracts. I am a Solution Architect/Business Analyst. I have worked in IT in several countries (NZ, Australia, South Africa, UK) building and training teams for government and very large non-governmental organizations. I am ex-Microsoft Consulting Services. I wrote the first book on Microsoft XML published in 2000 called XML Programming with VB and ASP. Most recently I have been building tools for the SEO industry. Ask me for a 37 point SEO health-checkup for your website.
First posted :03/24/2008
Times viewed :608
 

DOMXPath Function query

PHP Version: (No version information might be only in CVS. I have used this function in PHP5)

Description

This function executes an xpath query and returns the result as nodlist.

Usage:

objectDOMXPath->query ( string expression [, object contextnode])

Returns a DOMNodelist containing all nodes matching expression. Any expression which do not return nodes will return an empty DOMNodelist.

The optional contextnode can be specified for doing relative XPath queries.

PHP Code:

<?php

$xmlstr = <<<XML

<?xml version="1.0" encoding="UTF-8"?>

<company>

<employee>

<employeename id="myId">test1</employeename>

<employeeaddress>testAddress1</employeeaddress>

<SSN>11111</SSN>

<company>XYZ Corporation</company>

</employee>

<employee>

<employeename id="myId1">test1</employeename>

<employeeaddress>testAddress1</employeeaddress>

<SSN>11111</SSN>

<company>ABC Corporation</company>

</employee>

</company>

XML;

$dom = new domDocument;

//load the XML string into the DOM

$dom->loadXML($xmlstr);

//retrieve the second element with name employee

$employee = $dom->getElementsByTagName('employee')->item(1);

//creates a new domXPath object by passing the DOM Document

$xpath = new domXPath($dom);

//create a xpath query to return employeename with id  myId

$query = "//employeename[@id='myId']";

//execute the xpath query

$xpathQuery = $xpath->query($query);

//append the result nodes into second employee element

$size = $xpathQuery->length;

for ($i=0; $i<$size; $i++){

   $node = $xpathQuery->item($i);

   $employee->appendChild($node);

echo "<HTML>";

echo "<Head>";

echo "<title>Example of DOMXPath->query</title>";

echo "<Head>";

echo "<body>";

echo "<PRE>";

echohtmlentities($dom ->saveXML());

echo "</PRE>";

echo "</body>";

echo "</HTML>";

?>

The expected output would be:

<?xml version="1.0" encoding="UTF-8"?>
<company>
<employee>
      <!—employeename element is missing here because it is added to second employee element by using above PHP code -->
      <employeeaddress>testAddress1</employeeaddress>
      <SSN>11111</SSN>
      <company>XYZ Corporation</company>
</employee>
<employee>
      <employeename id="myId1">test1</employeename>
      <employeeaddress>testAddress1</employeeaddress>
      <SSN>11111</SSN>
      <company>ABC Corporation</company>
<employeename id="myId">test1</employeename></employee>
</company>
 


Note: to Know more XPATH please read XPATH tutorial

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