This morning at BarCamp Cork I gave a short talk on how to add AJAX functionality to WordPress plugins.
Here are the example scripts I used during the talk. Rename the files to .php and install as you would normal WordPress plugins.
- helloworld1.txt – very simple and basic “Hello World” plugin.
- helloworld2.txt – script that will display the text “Hello World” using an AJAX request to get the text from the server.
- helloworld3.txt – script that displays “Hello World” text, and an “update” link that increments a counter via an AJAX http request.
- helloworld4.txt – script that displays a simple form. The form has one text box, a “Random” button and a “Save” button. Clicking the “Random” button makes a request to the server to get a random number. “Save” sends the number to the server.
- helloworld5.txt and rate.txt – “Rating” script to rate a post (Originally from here). Makes an AJAX request to the server with the rating. Server returns randomly generated stats on rating. Place rate.php in wp-content/
All scripts that operate in the Settings page in the Dashboard use a nonce for security and access admin-ajax.php when making AJAX requests. The wp_ajax_$POST[ ‘action’ ] hook is used to execute the actual code that does something useful.
The rating script uses wp_enqueue_script() to load the jQuery class.
If you’re an Irish O2 user, and use Twitter you might like to install the new Tweet Tweet WordPress plugin. Thanks to Enda who let me use his O2 account briefly, I created a plugin that sends Twitter sms notifications using the free O2.ie web texts. That means Meteor, Vodafone and O2 are now covered. Anyone want to contribute a plugin for 3?
PS. I was very proud that Automattic was able to sponsor BarCamp Cork, and hopefully most of the WordPress badges found good homes! Conor says 116 signed up for the event, with just over 100 showing up. That’s a great number to pull in for a Saturday tech event!
More photos can be found on pix.ie and flickr. Looks like Phil hasn’t uploaded any of his shots yet! Can’t wait to see what came of his afternoon photo session. I had to leave early and missed it unfortunately.
Discovered photos of my presentation. Yes, I used Vi (or Vim if you want to be pedantic) to give my talk!