Seths Plugin Boiler Plate Idea - this is the "no singletons" version

seths-wordpress-plugin-boiler-plate.plugin.php

<?php
/**
 * Plugin Name: Fansided VIP
 * Plugin URI: http://fansided.com/
 * Description: All the amazing business logic Fansided provides to WordPress installs.
 * Author: sethcarstens
 * Version: 1.0.0
 * Author URI: http://www.linkedin.com/in/sethcarstens/
 * License: Privately Copyright - do not redistribute.
 * Text Domain: fs_vip
 *
 * @package fs_vip
 * @category plugin
 * @author Seth Carstens <seth.carstens@fansided.com>
 */

//avoid direct calls to this file, because now WP core and framework has been used
if ( ! function_exists( 'add_filter' ) ) {
	header('Status: 403 Forbidden'); header('HTTP/1.1 403 Forbidden'); exit();
}

if(!class_exists('fansided_vip'))
{
	class fansided_vip
	{
		public $installed_dir;
		public $installed_url;
		public $admin;
		public $modules;

		/**
		 * Construct the plugin object
		 *
		 * @since   1.0
		 */
		public function __construct()
		{
			$this->modules->count = 0;
			$this->installed_dir = dirname(__FILE__);
			$this->installed_url = plugins_url('/', __FILE__);

			#confirm PHP_TAB exists for use in printing
			if(!defined('PHP_TAB')) define('PHP_TAB',"\t");

			#extend current blog global variable with all blog details
			$GLOBALS['current_blog'] = get_blog_details($GLOBALS['current_blog']->blog_id);
			$GLOBALS['current_blog']->description = get_bloginfo('description');

			#initialize
			add_action('init', array($this,'init'));
			#loaded during init because loading during admin_init is too late for many admin functions
			if(is_admin()) add_action('init', array($this,'admin_init'));
		} // END public function __construct

		/**
		 * Initialize the plugin - for public (front end)
		 *
		 * @since   1.0
		 * @return  void
		 */
		public function init() {
			//always load includes folder php files
			$this->load_classes();
			#add meta data to HTML HEAD tag
			if(class_exists('fansided_social_meta')) $this->modules->fansided_social_meta  = new fansided_social_meta($this);
			if(class_exists('kses_custom_tag_allowances')) $this->modules->kses_custom_tag_allowances  = new kses_custom_tag_allowances($this);

		}

		/**
		 * Initialize the plugin - for admin (back end)
		 *
		 * @since   1.0
		 * @return  void
		 */
		public function admin_init() {
			//if user can edit posts, load VIP admin
			if(current_user_can('edit_others_posts')) {
				require_once($this->installed_dir.'/admin/fansided-vip-admin.php');
				$this->admin = new fansided_vip_admin($this);
			}
		}


		/**
		 * Activate the plugin
		 *
		 * @since   1.0
		 * @return  void
		 */
		public static function activate()
		{

		} // END public static function activate

		/**
		 * Deactivate the plugin
		 *
		 * @since   1.0
		 * @return  void
		 */
		public static function deactivate()
		{

		} // END public static function deactivate

		/**
		 * Loads PHP files in the includes folder
		 *
		 * @since   1.0
		 * @return  void
		 */
		protected function load_classes() {

			// load all files with the pattern *.php from the directory inc
			foreach( glob( dirname( __FILE__ ) . '/includes/*.php' ) as $class ) {
				require_once $class;
				$this->modules->count++;
			}
		}

	} // END class fansided_vip
} // END if(!class_exists('fansided_vip'))


/**
 * Build and initialize the plugin
 */
if(class_exists('fansided_vip'))
{
	// Installation and uninstallation hooks
	register_activation_hook(__FILE__, array('fansided_vip', 'activate'));
	register_deactivation_hook(__FILE__, array('fansided_vip', 'deactivate'));

	// instantiate the plugin class
	$fansided_vip = new fansided_vip();
}