Improved class concept

plugin-file.php

<?php # -*- coding: utf-8 -*-
declare( encoding = 'UTF-8' );
/**
 * Plugin Name: WP_Plugin class test
 * Version:     2012.01.17
 * Required:    3.3
 * Author:      Thomas Scholz
 * Author URI:  http://toscho.de
 * License:     GPL
 */

! defined( 'ABSPATH' ) and exit;

class WP_Plugin
{
	public function __construct()
	{
		$self           = new ReflectionClass( $this );
		$public_methods = $self->getMethods( ReflectionMethod::IS_PUBLIC );

		if ( empty ( $public_methods ) )
		{
			return;
		}

		foreach ( $public_methods as $method )
		{
			$params = $method->getNumberOfParameters();

			if ( 0 === strpos( $method->name, 'filter_' ) )
			{
				// priority MUST be two numbers long, eg.: 04 or 98
				$priority = (int) substr( $method->name, 7, 2 );
				$name     = substr( $method->name, 10 );
				add_filter(
					$name,
					array ( $this, $method->name ),
					$priority,
					$params
				);
			}
			elseif ( 0 === strpos( $method->name, 'action_' ) )
			{
				$priority = (int) substr( $method->name, 7, 2 );
				$name     = substr( $method->name, 10 );
				add_action(
					$name,
					array ( $this, $method->name ),
					$priority,
					$params
				);
			}
		}
	}
}

// Here's an example of a plugin that would benefit from the above
class Some_Plugin extends WP_Plugin
{
	public static function init()
	{
		new self;
	}

	// Will filter the_title
	public function filter_20_the_title( $title )
	{
		return $title . ' 123';
	}
	// Will run during wp_footer
	public function action_99_wp_footer()
	{
		echo "I'm in the footer!";
	}
}
// set a predictable point for execution.
add_action( 'plugins_loaded', array ( 'Some_Plugin', 'init' ), 99 );

Priority on hooks please and then is fine ;)

Done. :)

simple and useful

Outdated. See https://gist.github.com/1631723