Feeds

Harness XML with PHP 5 extensions

A time to query

The essential guide to IT transformation

Hands on PHP is one of the most commonly used languages for developing web sites while XML has become an industry standard for exchanging data. Increasingly, web sites use XML to transfer data through web feeds such as RSS and Atom, or through web services.

PHP 5 XML extensions provide support for parsing, transformation, XPath navigation, and schema validation of XML documents. The SimpleXML extension in PHP 5 simplifies node selection by converting an XML document to a PHP object that may be accessed with property selectors and array iterators. The XSL extension in PHP 5 is used to transform an XML document.

In this article, I'll show you how to process an example XML document, catalog.xml using the PHP 5 XML extensions.

First things first, though. Before you go anywhere, you'll need to install PHP 5 in Apache HTTP Server, and activate the XSL extension in the php.ini configuration file.

extension=php_xsl.dll

Restart Apache Server after modifying php.ini.

Create your XML

To create an XML document with the PHP 5 DOM extension create a PHP file, createXML.php , in the C:/Program Files/Apache Group/Apache2/htdocs directory, the document root directory of the Apache server. An XML document in PHP 5 is represented with DOMDocument class. Therefore, create a DOMDocument object. Specify the XML version and encoding in the DOMDocument constructor.

$domDocument = new DOMDocument('1.0','utf-8');

An element is represented with the DOMElement class. Create root element catalog with createElement(). Add the root element to the DOMDocument object with appendChild().

$catalog=    $domDocument->createElement("catalog");
$domDocument->appendChild ($catalog);

An attribute in a DOMElement object is represented with the DOMAttr class. Create attribute title with createAttribute(). Set the value of the title attribute using the value property. Add the title attribute to catalog element using setAttributeNode().

$titleAttribute= $domDocument->createAttribute("title");
    $titleAttribute->value="XML Zone";
    $catalog->setAttributeNode ($titleAttribute);

Create a journal element, including the date attribute, within the catalog element. Add an article element, including sub elements title and author, within the journal element. A text node in an element is represented with the DOMText class. Create a text node using the createTextNode() to set the text of title element.

$titleText= $domDocument->createTextNode("The Java XPath API");
 $title->appendChild ($titleText);

Output the XML document created to the browser using saveXML().

$domDocument->saveXML();

Run the PHP script with URL http://localhost/createXML.php. The XML document, catalog.xml, gets generated.

Secure remote control for conventional and virtual desktops

Next page: Parse the XML

More from The Register

next story
Apple promises to lift Curse of the Drained iPhone 5 Battery
Have you tried turning it off and...? Never mind, here's a replacement
Mozilla's 'Tiles' ads debut in new Firefox nightlies
You can try turning them off and on again
Linux turns 23 and Linus Torvalds celebrates as only he can
No, not with swearing, but by controlling the release cycle
Scratched PC-dispatch patch patched, hatched in batch rematch
Windows security update fixed after triggering blue screens (and screams) of death
This is how I set about making a fortune with my own startup
Would you leave your well-paid job to chase your dream?
prev story

Whitepapers

Endpoint data privacy in the cloud is easier than you think
Innovations in encryption and storage resolve issues of data privacy and key requirements for companies to look for in a solution.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Advanced data protection for your virtualized environments
Find a natural fit for optimizing protection for the often resource-constrained data protection process found in virtual environments.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Next gen security for virtualised datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.