Create WordPress Custom Post Types & Taxonomies, and add custom columns to display CPT data

functions.php

<?php
/**
 * Add an action when WP Admin initialises to register our Custom Post Type
 */
function mdsgns_create_custom_post_types() {

	$types = array(
		// Where the magic happens
		array(
			'the_type' => 'store',
			'single' => 'Store',
			'plural' => 'Stores',
			'rewrite' => 'stores',
			'icon' => 'dashicons-store',
		),
		array(
			'the_type' => 'booktitle',
			'single' => 'Book Title',
			'plural' => 'Book Titles',
			'rewrite' => 'book-titles',
			'icon' => 'dashicons-book'
		)
	);

	foreach ( $types as $type ) {

		$the_type = $type['the_type'];
		$single = $type['single'];
		$plural = $type['plural'];
		$rewrite = $type['rewrite'];
		$icon = $type['icon'];

		$labels = array(
			'name' => _x( $plural, 'post type general name' ),
			'singular_name' => _x( $single, 'post type singular name' ),
			'add_new' => _x( 'Add New', $single ),
			'add_new_item' => __( 'Add New ' . $single ),
			'edit_item' => __( 'Edit ' . $single ),
			'new_item' => __( 'New ' . $single ),
			'view_item' => __( 'View ' . $single ),
			'search_items' => __( 'Search ' . $plural ),
			'not_found' =>  __( 'No ' . $plural . ' found' ),
			'not_found_in_trash' => __( 'No ' . $plural . ' found in Trash' ),
			'parent_item_colon' => ''
		);

		$args = array(
			'labels' => $labels,
			'public' => true,
			'has_archive' => true,
			'publicly_queryable' => true,
			'show_ui' => true,
			'query_var' => true,
			'rewrite' => true,
			'capability_type' => 'post',
			'hierarchical' => false,
			'menu_position' => 5,
			'block-editor' => false,
			'show_in_rest' => false,
			'rewrite' => array( 'slug' => $rewrite ),
			'supports' => array( 'title', 'editor', 'author', 'thumbnail', 'custom-fields', 'excerpt', 'revisions' ),
			'menu_icon' => $icon
		);

		register_post_type( $the_type, $args );

	}

}
add_action( 'init', 'mdsgns_create_custom_post_types' );

/**
 * Add an action when WP Admin initialises to registers our CPT Taxonomies
 */
function mdsgns_create_cpt_taxonomies() {
	// The name of our Custom Post Type
	$cptname = "store";
	// Our Taxonomy names
	// hierarchical => true are like categories
	// hierarchical => false are like tags
	$types = array(
		// Where the magic happens
		array('the_type' => 'store_category',
			'single' => 'Category',
			'plural' => 'Categories',
			'hierarchical' => true,
			'rewrite' => array( 'slug' => 'category' ),
			),
		array('the_type' => 'store_tag',
			'single' => 'Tag',
			'plural' => 'Tags',
			'hierarchical' => false,
			'rewrite' => array( 'slug' => 'tag' ),
			)
	);
	foreach ($types as $type) {
		$the_type = $type['the_type'];
		$single = $type['single'];
		$plural = $type['plural'];
		$hierarchical = $type['hierarchical'];
		$rewrite = $type['rewrite'];
		$labels = array(
			'name' => _x( $plural, 'taxonomy general name' ),
			'singular_name' => _x( $single, 'taxonomy singular name' ),
			'search_items' =>  __( 'Search ' . $plural ),
			'all_items' => __( 'All ' . $plural ),
			'parent_item' => __( 'Parent ' . $single ),
			'parent_item_colon' => __( 'Parent ' . $single.':' ),
			'edit_item' => __( 'Edit ' . $single ), 
			'update_item' => __( 'Update ' . $single ),
			'add_new_item' => __( 'Add New ' . $single ),
			'new_item_name' => __( 'New ' . $single ),
			'menu_name' => __( $single ),
		); 	
		register_taxonomy( $the_type, array( $cptname ), array(
			'hierarchical' => $hierarchical,
			'labels' => $labels,
			'update_count_callback' => '_update_post_term_count',
			'rewrite' => $rewrite
		));
	}
}
add_action( 'init', 'mdsgns_create_cpt_taxonomies', 0 );

/**
 * Flush the Rewrites on plugin activation to make sure the new Permalinks work
 * Use this if your CPT is within a plugin
 */
function ephemeris_plugin_rewrite_flush() {
	flush_rewrite_rules();
}
register_activation_hook( __FILE__, 'ephemeris_plugin_rewrite_flush' );

/**
 * Flush the Rewrites on theme switch to make sure the new Permalinks work
 * Use this if your CPT is within a theme
 */
function ephemeris_theme_rewrite_flush() {
	flush_rewrite_rules();
}
add_action( 'after_switch_theme', 'ephemeris_theme_rewrite_flush' );

/**
 * Add an action and filter to customise the display when viewing the list of Custom Posts
 * The hook name is actually `manage_edit-{$post_type}_columns` so ensure you replace {$post_type} with name of your Custom Post type
 */
function mdsgns_store_edit_columns( $columns ){
	$columns = array(
		'cb' => '<input type="checkbox" />',
		'title' => 'Store Name',
		'category' => 'Categories',
		'tag' => 'Tags',
		'date' => 'Date'
	);
	
	return $columns;
}
add_filter( 'manage_edit-store_columns', 'mdsgns_store_edit_columns' );

/**
 * Add an action and filter to add our content to the custom columns
 * The hook name is actually `manage_{$post_type}_posts_custom_column` so ensure you replace {$post_type} with name of your Custom Post type
 */
function mdsgns_store_custom_columns( $column ){
	global $post;
	
	switch ( $column ) {
		case 'category':
			echo get_the_term_list( $post->ID, 'store_category', '', ', ','' );
			break;
		case 'tag':
			echo get_the_term_list( $post->ID, 'store_tag', '', ', ','' );
			break;
	}
}
add_action( 'manage_store_posts_custom_column',  'mdsgns_store_custom_columns' );