A tiny little article plugin to demo Extended CPTs ... with translatable labels, menu icon, custom taxonomy, admin columns, admin filters and shortcode.

pixie-article.php

<?php

/**
 * @link              https://deliciousbrains.com/blog/
 * @since             1.0
 * @package           Pixie_Article
 *
 * @wordpress-plugin
 * Plugin Name:       Pixie Article
 * Plugin URI:        https://deliciousbrains.com/blog/
 * Description:       A tiny little article plugin to demo Extended CPTs.
 * Version:           1.0
 * Author:            ianmjones
 * Author URI:        https://profiles.wordpress.org/ianmjones
 * License:           GPL-2.0+
 * License URI:       http://www.gnu.org/licenses/gpl-2.0.txt
 * Text Domain:       pixie-article
 * Domain Path:       /languages
 * Network:           False
 */

// If this file is called directly, abort.
if ( ! defined( 'WPINC' ) ) {
	die;
}

function pixie_article_loaded() {
	require_once( 'extended-cpts/extended-cpts.php' );
	require_once( 'extended-taxos/extended-taxos.php' );

	load_plugin_textdomain(
		'pixie-article',
		false,
		dirname( plugin_basename( __FILE__ ) ) . '/languages/'
	);

	$labels  = array(
		'name'               => __( 'Pixie Articles', 'pixie-article' ),
		'singular_name'      => __( 'Pixie Article', 'pixie-article' ),
		'menu_name'          => __( 'Pixie Articles', 'pixie-article' ),
		'add_new'            => _x( 'Add New', 'Pixie Article', 'pixie-article' ),
		'add_new_item'       => __( 'Add New Pixie Article', 'pixie-article' ),
		'edit_item'          => __( 'Edit Pixie Article', 'pixie-article' ),
		'new_item'           => __( 'New Pixie Article', 'pixie-article' ),
		'view_item'          => __( 'View Pixie Article', 'pixie-article' ),
		'search_items'       => __( 'Search Pixie Articles', 'pixie-article' ),
		'not_found'          => __( 'No pixie articles found', 'pixie-article' ),
		'not_found_in_trash' => __( 'No pixie articles found in Trash', 'pixie-article' ),
		'parent_item_colon'  => __( 'Parent Pixie Article:', 'pixie-article' ),
		'all_items'          => __( 'All Pixie Articles', 'pixie-article' ),
	);
	$options = array(
		'labels'        => $labels,
		'menu_icon'     => 'dashicons-media-document',
		'admin_cols'    => array(
			'pixie_article_audience' => array(
				'taxonomy' => 'pixie-article-audience',
				'title'    => _x( 'Audience', 'Pixie Article Taxonomy', 'pixie-article' ),
			),
			'post_date'              => array(
				'title'      => __( 'Created', 'Date', 'pixie-article' ),
				'post_field' => 'post_date',
			),
			'post_modified'          => array(
				'title'      => __( 'Modified', 'Date', 'pixie-article' ),
				'post_field' => 'post_modified',
			),
		),
		'admin_filters' => array(
			'pixie_article_audience' => array(
				'taxonomy' => 'pixie-article-audience',
				'title'    => _x( 'Audience', 'Pixie Article Taxonomy', 'pixie-article' ),
			),
		),
	);
	register_extended_post_type( 'pixie-article', $options );

	register_extended_taxonomy( 'pixie-article-audience', 'pixie-article' );

	add_shortcode( 'pixie_articles', 'pixie_article_list' );
}

add_action( 'plugins_loaded', 'pixie_article_loaded' );

/**
 * Handler for pixie_articles shortcode to list all Pixie Article titles.
 *
 * @return string
 */
function pixie_article_list() {
	$output      = '';
	$posts_query = new WP_Query( 'post_type=pixie-article' );
	if ( $posts_query->have_posts() ) {
		$output .= '<div class="pixie-articles">';
		while ( $posts_query->have_posts() ) {
			$posts_query->the_post();
			$output .= the_title( '', '<br />' );
		}
		$output .= '</div>';
	}
	wp_reset_postdata();

	return $output;
}