Feeds

Xajax and PHP: JavaScript without the pain

Automatic for the people

  • alert
  • submit to reddit

HP ProLiant Gen8: Integrated lifecycle automation

Hands on When it comes to Web 2.0, PHP’s seen it all before. Birthed before the last great internet boom, PHP has matured and is now one of a triumvirate of languages synonymous with today’s craze for building web sites and online services with Linux and MySQL.

While it shares LAMP honors with Perl and Python, though, PHP has become the most commonly used server-side platforms for Ajax and, of all the Ajax frameworks for PHP, Xajax is the most commonly used. If you are not familiar with JavaScript, which forms the basis of Ajax, but still would like to use Ajax with PHP, Xajax is the obvious choice because Xajax generates the required JavaScript for you.

In this Hands On, I’ll demonstrate a simple way to use Ajax and PHP within Xajax, with an Oracle database, while sidestepping the need for the problematic XMLHttpRequest.

Xajax backrounder

Xajax is an open source, object oriented, PHP class library that can be used with PHP scripts for server-side processing. Xajax is used to communicate asynchronously between a client- and a server-side application comprised of PHP scripts, and generates JavaScript wrapper functions so that PHP functions on the server can be accessed from a client application.

When a client application invokes the wrapper functions, a XMLHttpRequest object is initiated and a XMLHttpRequest object is sent to the server. On the server, the Xajax object receives the XMLHttpRequest and invokes the PHP functions corresponding to the JavaScript wrapper functions.

The default request type of PHP functions registered through Xajax is POST. The PHP functions return an XML response that is returned to the client application by the Xajax object. Based on the instructions in the XML response, the Xajax’s JavaScript message pump updates the content of the client input page. Xajax has a feature that, data is updated only if data has been modified.

Download and go

As Xajax is a PHP class library, first download and install PHP 5 and Apache2 HTTP server as explained in an earlier, article on PHP. The example application shall store and fetch data from Oracle database 10g. Therefore, enable the Oracle database extension in the php.ini configuration file.

extension=php_oci8.dll

Create an example database table in OE schema with a PHP script, Table.php, which is available in resources zip. Download Xajax0.2.4/0.2.5. Extract xajax_0.2.4.zip file to the C:/Program Files/Apache Group/Apache2/htdocs directory.

The Power of One eBook: Top reasons to choose HP BladeSystem

More from The Register

next story
Apple fanbois SCREAM as update BRICKS their Macbook Airs
Ragegasm spills over as firmware upgrade kills machines
HIDDEN packet sniffer spy tech in MILLIONS of iPhones, iPads – expert
Don't panic though – Apple's backdoor is not wide open to all, guru tells us
Mozilla fixes CRITICAL security holes in Firefox, urges v31 upgrade
Misc memory hazards 'could be exploited' - and guess what, one's a Javascript vuln
NO MORE ALL CAPS and other pleasures of Visual Studio 14
Unpicking a packed preview that breaks down ASP.NET
Captain Kirk sets phaser to SLAUGHTER after trying new Facebook app
William Shatner less-than-impressed by Zuck's celebrity-only app
Cheer up, Nokia fans. It can start making mobes again in 18 months
The real winner of the Nokia sale is *drumroll* ... Nokia
EU dons gloves, pokes Google's deals with Android mobe makers
El Reg cops a squint at investigatory letters
Chrome browser has been DRAINING PC batteries for YEARS
Google is only now fixing ancient, energy-sapping bug
prev story

Whitepapers

Designing a Defense for Mobile Applications
Learn about the various considerations for defending mobile applications - from the application architecture itself to the myriad testing technologies.
How modern custom applications can spur business growth
Learn how to create, deploy and manage custom applications without consuming or expanding the need for scarce, expensive IT resources.
Reducing security risks from open source software
Follow a few strategies and your organization can gain the full benefits of open source and the cloud without compromising the security of your applications.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Consolidation: the foundation for IT and business transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.