pippinsplugins

http://pippinsplugins.com/modular-plugins-presentation-from-wordcamp-kansas-city-2012/
http://pippinsplugins.com/lets-talk-extensible-code/
http://wp.tutsplus.com/tutorials/the-beginners-guide-to-wordpress-actions-and-filters/
http://wp.tutsplus.com/tutorials/plugins/writing-extensible-plugins-with-actions-and-filters/

pippinsplugins

<?php

class EDD_Sample_Email_Tag {

	function __construct() {

		add_action( 'edd_add_email_tags', array( $this, 'add_sample_tag' ), 100 );

	}

pippinsplugins

<?php
/**
 * Plugin Name: Settings Import / Export Example Plugin
 * Plugin URI: http://pippinsplugins.com/building-a-settings-import-and-export-feature
 * Description: An example plugin that shows how to create a settings import and export feature
 * Author: Pippin Williamson
 * Author URI: http://pippinsplugins.com
 * Version: 1.0
 */

pippinsplugins

// user login form
function pw_rcp_login_form( $atts, $content = null ) {

	global $post;

	$prev_page = $_SERVER['HTTP_REFERER'];

	extract( shortcode_atts( array(
		'redirect' 	=> $prev_page,
		'class' 	=> 'rcp_form'

pippinsplugins

<?php
/**
 * Plugin Name: Restrict Content Pro - Collect Billing Address
 * Description: Collect customers billing address during registration through Restrict Content Pro
 * Author: Pippin Williamson
 * Version: 1.0
 */

class RCP_Billing_Address {

pippinsplugins

<?php

/**
 * Upgrade Functions
 *
 * @package     Easy Digital Downloads
 * @subpackage  Download Functions
 * @copyright   Copyright (c) 2012, Pippin Williamson
 * @license     http://opensource.org/licenses/gpl-2.0.php GNU Public License
 * @since       1.3.1

pippinsplugins

<?php
# 
# rt-theme loop
#
global $args,$content_width,$paged;

add_filter('excerpt_more', 'no_excerpt_more'); 
 
//varialbles
$video_width 		= ($content_width 	=="960") ? 940 : 606; 

pippinsplugins

<?php
/*
Plugin Name: Restrict Content Pro - Custom User Fields
Description: Illustrates how to add custom user fields to the Restrict Content Pro registration form that can also be edited by the site admins
Version: 1.0
Author: Pippin Williamson
Author URI: http://pippinsplugins.com
Contributors: mordauk
*/

pippinsplugins

<?php

function pw_edd_add_email_confirmation() {
	?>
	<p>
		<label class="edd-label" for="edd-email-confirm">
			<?php _e('Confirm Your Email Address', 'easy-digital-downloads'); ?>
			<span class="edd-required-indicator">*</span>
		</label>
		<span class="edd-description" id="edd-email-description"><?php esc_html_e( 'Please confirm your email address.', 'easy-digital-downloads' ); ?></span>

pippinsplugins

<?php
/*
 * Plugin name: Affiliate role on registration
 */

function pw_affwp_set_role_on_registration( $affiliate_id = 0 ) {
	
	$user_id = affwp_get_affiliate_user_id( $affiliate_id );
	$user = new WP_User( $user_id );
	$user->add_role( 'affiliate' );