Tech Chorus

On 30 October 2010, the Bangalore PHP User Group met at Microsoft. I gave a talk, XML For PHP Developers, in the event.

I'm sharing the slides in this entry.

It was an introductory talk on XML for PHP developers. There are hundreds of technologies built on top of XML. We have all heard about RSS, Atom, XML-RPC, SOAP, etc. The goal of the talk was to get PHP developers to start using XML. In the talk, I presented three recipes:

• Parsing RSS feeds using simplexml. This was based on my blog post about retrieving weather information in your location using Yahoo! Weather.
• Generating Atom feed document using DOM.
• Scraping web pages using DOM and XPath. This was based on Web Scraping With lxml. This time I did in PHP.

Today, we will learn how to toggle the 'disabled' attribute of input elements in a div block using jQuery.

The 'disabled' attributed is set to HTML input elements where user input is not desirable. When 'disabled' attribute is set to an input element, it is rendered read only. The read only input elements make lot of sense in various contexts.

<input type="text" name="elementName" disabled="disabled" />

Wouldn't it be more fun if we play around with the 'disabled' attribute programmatically? We are going to do exactly the same in this example.