How to make wordpress plugin: General

Tue, 21 Jul 2009 11:57:26 +0000

This article will present you with the basics of wordpress plugin. I have create a plugin to help you understand how to create a plugin. This simple plugin shows a digg button to all your post. You can download the full code here. Below is several code I use:

class diggme
{
function diggme() {

add_action(‘init’, array($this, ‘init’));
add_action(‘admin_menu’, array(&$this, ‘setmenu’));
add_filter(‘the_content’, array(&$this, ‘the_content_filter’));
}

function init()
{
?>
/wp-content/plugins/diggme/css.css” rel=”stylesheet” type=”text/css” />
}

function managepage(){
echo “

This is setting page. Just ignore this

”;
}

function setmenu () {
add_options_page(
‘DiggMe’,
‘DiggMe’,
‘manage_options’,
__FILE__,
array(&$this,’managepage’ ) );
}

function the_content_filter($content)
{
return $this->displaydigg() . $content;
}

function displaydigg()
{
global $post;

return “

ID).”\”>

”;
}

}

$diggme = new diggme();

The code will first create a class called diggme. Every time the plugin loads it will create an object of this class using $diggme = new diggme();

The constructor

add_action(‘init’, array($this, ‘init’)); -> This will tell your blog to execute function init whenever it loads.
add_action(‘admin_menu’, array(&$this, ‘setmenu’)); -> This will tell your blog to create menu at your admin page. You can place any settings here.
add_filter(‘the_content’, array(&$this, ‘the_content_filter’)); -> This will be executed every time when your post loads. In this example we will load function the_content_filter every time the page loads, read the post content and add a digg button to the post.

Other function is easy to understand if you have basic PHP skill. If you have any question just comment below.

Web development » Phase 2

How to make wordpress plugin: General