Allows you to quickly add multiple custom post types and taxonomies to WordPress via a plugin

cpt.php

<?php
/**
 * Plugin Name: {NAMESPACE}: Post Types
 * Description: Add custom post types
 * Author: {AUTHOR}
 * Author URI: {AUTHOR_URL}
 * Version: 1.0.0
 */

add_action( 'init', array('{NAMESPACE}_PostTypes', 'init') );


class {NAMESPACE}_PostTypes {


    /**
     * Multiple post_types
     *
     * @var  array
     */
    private static $post_types = array(
        '' => array(
            'post_type'   => '',
            'name'        => '',
            'name_single' => '',
            'menu_icon'   => '' // https://developer.wordpress.org/resource/dashicons/
        )
    );
    

    /**
     * Multiple taxonomies
     *
     * @var  array
     */
    private static $taxonomies = array(
        '' => array(
            'taxonomy'          => '',
            'for_post_type'     => '',
            'name'              => '',
            'name_single'       => '',
            'hierarchical'      => false,
            'show_ui'           => true,
            'show_admin_column' => true,
            'query_var'         => true,
            'rewrite'           => array('slug' => ''),
        )
    );


    /**
     * Initial functions to fire
     * 
     * @return  void
     */
    function init()
    {
        {NAMESPACE}_PostTypes::create_post_types();
        {NAMESPACE}_PostTypes::create_taxonomies();
    }


    /**
     * Creates the custom post types based on the `$post_types` class variable
     *
     * @return  void
     */
    function create_post_types()
    {
        $post_types = {NAMESPACE}_PostTypes::$post_types;

        foreach ($post_types as $post_type) {

            $labels = array(
                'name'               => $post_type['name'],
                'singular_name'      => $post_type['name_single'],
                'menu_name'          => $post_type['name'],
                'name_admin_bar'     => $post_type['name_single'],
                'add_new'            => __( 'Add New' ),
                'add_new_item'       => __( 'Add New' ) . ' ' . $post_type['name_single'],
                'new_item'           => __( 'New' ) . ' ' . $post_type['name_single'],
                'edit_item'          => __( 'Edit' ) . ' ' . $post_type['name_single'],
                'view_item'          => __( 'View' ) . ' ' . $post_type['name_single'],
                'all_items'          => __( 'All' ) . ' ' . $post_type['name'],
                'search_items'       => __( 'Search' ) . ' ' . $post_type['name'],
                'parent_item_colon'  => __( 'Parent' ) . ' ' . $post_type['name_single'] . ':',
                'not_found'          => __( 'None found.' ),
                'not_found_in_trash' => __( 'None in Trash.' )
            );

            register_post_type( $post_type['post_type'],
                array(
                    'labels'      => $labels,
                    'public'      => true,
                    'has_archive' => false,
                    'rewrite'     => array('slug' => $post_type['post_type']),
                    'menu_icon'   => $config['menu_icon']
                )
            );

        }
    }


    /**
     * Creates taxonomies based on the `$taxonomies` class variable
     *
     * @return  void
     */
    public static function create_taxonomies()
    {
        $taxonomies = {NAMESPACE}_PostTypes::$taxonomies;

        foreach ($taxonomies as $taxonomy) {
            $labels = array(
                'name'              => $taxonomy['name'],
                'singular_name'     => $taxonomy['name_single'],
                'menu_name'         => $taxonomy['name'],
                'search_items'      => __( 'Search' ) . ' ' . $taxonomy['name'],
                'all_items'         => __( 'All' ) . ' ' . $taxonomy['name'],
                'edit_item'         => __( 'Edit' ) . ' ' . $taxonomy['name_single'],
                'update_item'       => __( 'Update' ) . ' ' . $taxonomy['name_single'],
                'add_new_item'      => __( 'Add New' ),
                'new_item_name'     => __( 'Add New' ) . ' ' . $taxonomy['name_single'],
            );

            $options = array(
                'hierarchical'      => $taxonomy['hierarchical'],
                'show_ui'           => $taxonomy['show_ui'],
                'show_admin_column' => $taxonomy['show_admin_column'],
                'query_var'         => $taxonomy['query_var'],
                'rewrite'           => $taxonomy['rewrite']
            );

            if ($taxonomy['hierarchical']) {
                $labels['parent_item']       = __( 'Parent' ) . ' ' . $taxonomy['name_single'];
                $labels['parent_item_colon'] = __( 'Parent' ) . ' ' . $taxonomy['name_single'] . ':';
            } else {
                $labels['popular_items']              = __( 'Popular' ) . ' ' . $taxonomy['name'];
                $labels['separate_items_with_commas'] = __( 'Separate with commas' );
                $labels['add_or_remove_items']        = __( 'Add or remove' ) . ' ' . $taxonomy['name'];
                $labels['choose_from_most_used']      = __( 'Choose from the most used' ) . ' ' . $taxonomy['name'];
                $options['update_count_callback']     = '_update_post_term_count';
            }

            $options['labels'] = $labels;

            register_taxonomy($taxonomy['taxonomy'], $taxonomy['for_post_type'], $options);
        }
    }

}