example-wp-post-type.php

<?php
	/////////////////////////////
	# Register Post Type
	/////////////////////////////
	add_action('init', 'register_post_type_review');
	function register_post_type_review(){
		
		# NOTE: to enable comments for your custom post type, you must set the option 'default_comment_status' to true:		update_option('default_comment_status', true);
		// or goto: WP ADMIN => SETTINGS => DISCUSSION => check the "Allow people to post comments on new articles" 
		
		$post_types = array('review');
		if(!empty($post_types)){
			
			foreach($post_types as $slug){
				
				register_post_type(
					$slug,
					array(
						'labels' => array(
							'name' 				=> __( 'Reviews', TEXTDOMAIN ), 			// this name will be used when will will call the investments in our theme
							'menu_name' 		=> __( 'Reviews', TEXTDOMAIN ),
							'singular_name' 	=> __( 'Review', TEXTDOMAIN ),
							'add_new' 			=> __( 'Add New', TEXTDOMAIN ),
							'add_new_item' 		=> __('Add New Review', TEXTDOMAIN), 		// custom name to show up instead of Add New Post. Same for the following
							'name_admin_bar' 	=> __('Add New Review', TEXTDOMAIN), 		// custom name to show up instead of Add New Post. Same for the following
							'all_items' 		=> __('All Reviews', TEXTDOMAIN),
							'edit_item' 		=> __('Edit Review', TEXTDOMAIN),
							'new_item' 			=> __('New Review', TEXTDOMAIN),
							'view_item' 		=> __('View Review', TEXTDOMAIN),
							'search_items' 		=> __('Search Reviews', TEXTDOMAIN),
							'not_found' 		=> __('No Reviews Found', TEXTDOMAIN),
							'not_found_in_trash' => __('No Reviews Found in Trash', TEXTDOMAIN),
							'parent_item_colon'  => __('Parent Page', TEXTDOMAIN),
						),
						'public' 				=> true,									// how the type is visible to authors
						'has_archive' 			=> true,
						'exclude_from_search'	=> false,
						'publicly_queryable'	=> true,
						'show_ui' 				=> true,									// display in admin area
						'show_in_menu' 			=> true,									// display in admin menu
						'show_in_nav_menus' 	=> true,									// display in admin menu
						'show_in_admin_bar' 	=> true,									// display in admin bar
						'menu_position' 		=> 5,										// 5 - below posts
						// 'menu_icon' 			=> 'dashicons-editor-code',					
						'menu_icon' 			=> 'dashicons-portfolio',					
						'capability_type' 		=> 'post', 									// will act like a normal post
						'hierarchical' 			=> false,					 				// it means we cannot have parent and sub pages
						// 'rewrite' 				=> array( 'slug' => 'slug-goes-here/yes' ),
						'rewrite' 				=> true,
						'query_var' 			=> true,
						'can_export' 			=> true,
						'supports' => array( 'title', 'editor', 'thumbnail', 'excerpt', 'comments' ), // title, editor, author, thumbnail, excerpt, trackbacks, custom-fields, comments, revisions, page-attributes, post-formats
						'taxonomies' 			=> array($slug. '_tag', $slug. '_category'), // Adding Categories Boxes
						'capabilities' => array(
							'read_post'				=> 'read',
							'edit_post' 			=> 'read',
							'edit_posts' 			=> 'read',
							'edit_others_posts' 	=> 'administrator',
							'publish_posts' 		=> 'administrator',
							'read_private_posts' 	=> 'read',
							'delete_posts' 			=> 'administrator',
							'delete_others_posts' 	=> 'administrator',
							'delete_post' 			=> 'administrator',
						),
					)
				);
				
			} // endforeach 
		} // endif
		
	}
?>

example-wp-taxonomy.php

<?php
	/////////////////////////////
	# Register Taxonomies
	/////////////////////////////
	add_action( 'init', 'register_taxonomies_review', 0 );
	function register_taxonomies_review() {
		
		//////////////////////
		# Review Categories
		//////////////////////
		$slug = 'review_category';
		$post_types = array('review');
		$labels = array(
			'menu_name'         => __( 'Categories', TEXTDOMAIN ),
			'name'              => _x( 'Categories', 'taxonomy general name' ),
			'singular_name'     => _x( 'Review Category', 'taxonomy singular name' ),
			'search_items'      => __( 'Search Categories', TEXTDOMAIN ),
			'all_items'         => __( 'All Categories', TEXTDOMAIN ),
			'parent_item'       => __( 'Parent Category', TEXTDOMAIN ),
			'parent_item_colon' => __( 'Parent Category:', TEXTDOMAIN ),
			'edit_item'         => __( 'Edit Category', TEXTDOMAIN ),
			'update_item'       => __( 'Update Category', TEXTDOMAIN ),
			'add_new_item'      => __( 'Add New Category', TEXTDOMAIN ),
			'new_item_name'     => __( 'New Category Name', TEXTDOMAIN ),
		);
		$args = array(
			'hierarchical'      => true,
			'labels'            => $labels,
			'show_ui'           => true,
			'show_admin_column' => true,
			'query_var'         => true,
			'rewrite'           => array( 'slug' => $slug ),
		);
		register_taxonomy( $slug, $post_types, $args );

		//////////////////
		# Review Tags
		//////////////////
		$slug = 'review_tag';
		$post_types = array('review');
		$labels = array(
			'menu_name'                  => __( 'Tags', TEXTDOMAIN ),
			'name'                       => _x( 'Tags', 'taxonomy general name' ),
			'singular_name'              => _x( 'Tag', 'taxonomy singular name' ),
			'search_items'               => __( 'Search Tags', TEXTDOMAIN ),
			'popular_items'              => __( 'Popular Tags', TEXTDOMAIN ),
			'all_items'                  => __( 'All Tags', TEXTDOMAIN ),
			'parent_item'                => null,
			'parent_item_colon'          => null,
			'edit_item'                  => __( 'Edit Tag', TEXTDOMAIN ),
			'update_item'                => __( 'Update Tag', TEXTDOMAIN ),
			'add_new_item'               => __( 'Add New Tag', TEXTDOMAIN ),
			'new_item_name'              => __( 'New Tag Name', TEXTDOMAIN ),
			'separate_items_with_commas' => __( 'Separate tags with commas', TEXTDOMAIN ),
			'add_or_remove_items'        => __( 'Add or remove tags', TEXTDOMAIN ),
			'choose_from_most_used'      => __( 'Choose from the most used tags', TEXTDOMAIN ),
			'not_found'                  => __( 'No tags found.', TEXTDOMAIN ),
		);
		$args = array(
			'hierarchical'          => false,
			'labels'                => $labels,
			'show_ui'               => true,
			'show_admin_column'     => true,
			'update_count_callback' => '_update_post_term_count',
			'query_var'             => true,
			'rewrite'               => array( 'slug' => $slug ),
		);
		register_taxonomy( $slug, $post_types, $args );
		
	}
?>