create_initial_post_types() WordPress Function

function create_initial_post_types() {
	WP_Post_Type::reset_default_labels();

	register_post_type(
		'post',
		array(
			'labels'                => array(
				'name_admin_bar' => _x( 'Post', 'add new from admin bar' ),
			),
			'public'                => true,
			'_builtin'              => true, /* internal use only. don't use this when registering your own post type. */
			'_edit_link'            => 'post.php?post=%d', /* internal use only. don't use this when registering your own post type. */
			'capability_type'       => 'post',
			'map_meta_cap'          => true,
			'menu_position'         => 5,
			'menu_icon'             => 'dashicons-admin-post',
			'hierarchical'          => false,
			'rewrite'               => false,
			'query_var'             => false,
			'delete_with_user'      => true,
			'supports'              => array( 'title', 'editor', 'author', 'thumbnail', 'excerpt', 'trackbacks', 'custom-fields', 'comments', 'revisions', 'post-formats' ),
			'show_in_rest'          => true,
			'rest_base'             => 'posts',
			'rest_controller_class' => 'WP_REST_Posts_Controller',
		)
	);

	register_post_type(
		'page',
		array(
			'labels'                => array(
				'name_admin_bar' => _x( 'Page', 'add new from admin bar' ),
			),
			'public'                => true,
			'publicly_queryable'    => false,
			'_builtin'              => true, /* internal use only. don't use this when registering your own post type. */
			'_edit_link'            => 'post.php?post=%d', /* internal use only. don't use this when registering your own post type. */
			'capability_type'       => 'page',
			'map_meta_cap'          => true,
			'menu_position'         => 20,
			'menu_icon'             => 'dashicons-admin-page',
			'hierarchical'          => true,
			'rewrite'               => false,
			'query_var'             => false,
			'delete_with_user'      => true,
			'supports'              => array( 'title', 'editor', 'author', 'thumbnail', 'page-attributes', 'custom-fields', 'comments', 'revisions' ),
			'show_in_rest'          => true,
			'rest_base'             => 'pages',
			'rest_controller_class' => 'WP_REST_Posts_Controller',
		)
	);

	register_post_type(
		'attachment',
		array(
			'labels'                => array(
				'name'           => _x( 'Media', 'post type general name' ),
				'name_admin_bar' => _x( 'Media', 'add new from admin bar' ),
				'add_new'        => _x( 'Add New', 'add new media' ),
				'edit_item'      => __( 'Edit Media' ),
				'view_item'      => __( 'View Attachment Page' ),
				'attributes'     => __( 'Attachment Attributes' ),
			),
			'public'                => true,
			'show_ui'               => true,
			'_builtin'              => true, /* internal use only. don't use this when registering your own post type. */
			'_edit_link'            => 'post.php?post=%d', /* internal use only. don't use this when registering your own post type. */
			'capability_type'       => 'post',
			'capabilities'          => array(
				'create_posts' => 'upload_files',
			),
			'map_meta_cap'          => true,
			'menu_icon'             => 'dashicons-admin-media',
			'hierarchical'          => false,
			'rewrite'               => false,
			'query_var'             => false,
			'show_in_nav_menus'     => false,
			'delete_with_user'      => true,
			'supports'              => array( 'title', 'author', 'comments' ),
			'show_in_rest'          => true,
			'rest_base'             => 'media',
			'rest_controller_class' => 'WP_REST_Attachments_Controller',
		)
	);
	add_post_type_support( 'attachment:audio', 'thumbnail' );
	add_post_type_support( 'attachment:video', 'thumbnail' );

	register_post_type(
		'revision',
		array(
			'labels'           => array(
				'name'          => __( 'Revisions' ),
				'singular_name' => __( 'Revision' ),
			),
			'public'           => false,
			'_builtin'         => true, /* internal use only. don't use this when registering your own post type. */
			'_edit_link'       => 'revision.php?revision=%d', /* internal use only. don't use this when registering your own post type. */
			'capability_type'  => 'post',
			'map_meta_cap'     => true,
			'hierarchical'     => false,
			'rewrite'          => false,
			'query_var'        => false,
			'can_export'       => false,
			'delete_with_user' => true,
			'supports'         => array( 'author' ),
		)
	);

	register_post_type(
		'nav_menu_item',
		array(
			'labels'                => array(
				'name'          => __( 'Navigation Menu Items' ),
				'singular_name' => __( 'Navigation Menu Item' ),
			),
			'public'                => false,
			'_builtin'              => true, /* internal use only. don't use this when registering your own post type. */
			'hierarchical'          => false,
			'rewrite'               => false,
			'delete_with_user'      => false,
			'query_var'             => false,
			'map_meta_cap'          => true,
			'capability_type'       => array( 'edit_theme_options', 'edit_theme_options' ),
			'capabilities'          => array(
				// Meta Capabilities.
				'edit_post'              => 'edit_post',
				'read_post'              => 'read_post',
				'delete_post'            => 'delete_post',
				// Primitive Capabilities.
				'edit_posts'             => 'edit_theme_options',
				'edit_others_posts'      => 'edit_theme_options',
				'delete_posts'           => 'edit_theme_options',
				'publish_posts'          => 'edit_theme_options',
				'read_private_posts'     => 'edit_theme_options',
				'read'                   => 'read',
				'delete_private_posts'   => 'edit_theme_options',
				'delete_published_posts' => 'edit_theme_options',
				'delete_others_posts'    => 'edit_theme_options',
				'edit_private_posts'     => 'edit_theme_options',
				'edit_published_posts'   => 'edit_theme_options',
			),
			'show_in_rest'          => true,
			'rest_base'             => 'menu-items',
			'rest_controller_class' => 'WP_REST_Menu_Items_Controller',
		)
	);

	register_post_type(
		'custom_css',
		array(
			'labels'           => array(
				'name'          => __( 'Custom CSS' ),
				'singular_name' => __( 'Custom CSS' ),
			),
			'public'           => false,
			'hierarchical'     => false,
			'rewrite'          => false,
			'query_var'        => false,
			'delete_with_user' => false,
			'can_export'       => true,
			'_builtin'         => true, /* internal use only. don't use this when registering your own post type. */
			'supports'         => array( 'title', 'revisions' ),
			'capabilities'     => array(
				'delete_posts'           => 'edit_theme_options',
				'delete_post'            => 'edit_theme_options',
				'delete_published_posts' => 'edit_theme_options',
				'delete_private_posts'   => 'edit_theme_options',
				'delete_others_posts'    => 'edit_theme_options',
				'edit_post'              => 'edit_css',
				'edit_posts'             => 'edit_css',
				'edit_others_posts'      => 'edit_css',
				'edit_published_posts'   => 'edit_css',
				'read_post'              => 'read',
				'read_private_posts'     => 'read',
				'publish_posts'          => 'edit_theme_options',
			),
		)
	);

	register_post_type(
		'customize_changeset',
		array(
			'labels'           => array(
				'name'               => _x( 'Changesets', 'post type general name' ),
				'singular_name'      => _x( 'Changeset', 'post type singular name' ),
				'add_new'            => _x( 'Add New', 'Customize Changeset' ),
				'add_new_item'       => __( 'Add New Changeset' ),
				'new_item'           => __( 'New Changeset' ),
				'edit_item'          => __( 'Edit Changeset' ),
				'view_item'          => __( 'View Changeset' ),
				'all_items'          => __( 'All Changesets' ),
				'search_items'       => __( 'Search Changesets' ),
				'not_found'          => __( 'No changesets found.' ),
				'not_found_in_trash' => __( 'No changesets found in Trash.' ),
			),
			'public'           => false,
			'_builtin'         => true, /* internal use only. don't use this when registering your own post type. */
			'map_meta_cap'     => true,
			'hierarchical'     => false,
			'rewrite'          => false,
			'query_var'        => false,
			'can_export'       => false,
			'delete_with_user' => false,
			'supports'         => array( 'title', 'author' ),
			'capability_type'  => 'customize_changeset',
			'capabilities'     => array(
				'create_posts'           => 'customize',
				'delete_others_posts'    => 'customize',
				'delete_post'            => 'customize',
				'delete_posts'           => 'customize',
				'delete_private_posts'   => 'customize',
				'delete_published_posts' => 'customize',
				'edit_others_posts'      => 'customize',
				'edit_post'              => 'customize',
				'edit_posts'             => 'customize',
				'edit_private_posts'     => 'customize',
				'edit_published_posts'   => 'do_not_allow',
				'publish_posts'          => 'customize',
				'read'                   => 'read',
				'read_post'              => 'customize',
				'read_private_posts'     => 'customize',
			),
		)
	);

	register_post_type(
		'oembed_cache',
		array(
			'labels'           => array(
				'name'          => __( 'oEmbed Responses' ),
				'singular_name' => __( 'oEmbed Response' ),
			),
			'public'           => false,
			'hierarchical'     => false,
			'rewrite'          => false,
			'query_var'        => false,
			'delete_with_user' => false,
			'can_export'       => false,
			'_builtin'         => true, /* internal use only. don't use this when registering your own post type. */
			'supports'         => array(),
		)
	);

	register_post_type(
		'user_request',
		array(
			'labels'           => array(
				'name'          => __( 'User Requests' ),
				'singular_name' => __( 'User Request' ),
			),
			'public'           => false,
			'_builtin'         => true, /* internal use only. don't use this when registering your own post type. */
			'hierarchical'     => false,
			'rewrite'          => false,
			'query_var'        => false,
			'can_export'       => false,
			'delete_with_user' => false,
			'supports'         => array(),
		)
	);

	register_post_type(
		'wp_block',
		array(
			'labels'                => array(
				'name'                     => _x( 'Reusable blocks', 'post type general name' ),
				'singular_name'            => _x( 'Reusable block', 'post type singular name' ),
				'add_new'                  => _x( 'Add New', 'Reusable block' ),
				'add_new_item'             => __( 'Add new Reusable block' ),
				'new_item'                 => __( 'New Reusable block' ),
				'edit_item'                => __( 'Edit Reusable block' ),
				'view_item'                => __( 'View Reusable block' ),
				'all_items'                => __( 'All Reusable blocks' ),
				'search_items'             => __( 'Search Reusable blocks' ),
				'not_found'                => __( 'No reusable blocks found.' ),
				'not_found_in_trash'       => __( 'No reusable blocks found in Trash.' ),
				'filter_items_list'        => __( 'Filter reusable blocks list' ),
				'items_list_navigation'    => __( 'Reusable blocks list navigation' ),
				'items_list'               => __( 'Reusable blocks list' ),
				'item_published'           => __( 'Reusable block published.' ),
				'item_published_privately' => __( 'Reusable block published privately.' ),
				'item_reverted_to_draft'   => __( 'Reusable block reverted to draft.' ),
				'item_scheduled'           => __( 'Reusable block scheduled.' ),
				'item_updated'             => __( 'Reusable block updated.' ),
			),
			'public'                => false,
			'_builtin'              => true, /* internal use only. don't use this when registering your own post type. */
			'show_ui'               => true,
			'show_in_menu'          => false,
			'rewrite'               => false,
			'show_in_rest'          => true,
			'rest_base'             => 'blocks',
			'rest_controller_class' => 'WP_REST_Blocks_Controller',
			'capability_type'       => 'block',
			'capabilities'          => array(
				// You need to be able to edit posts, in order to read blocks in their raw form.
				'read'                   => 'edit_posts',
				// You need to be able to publish posts, in order to create blocks.
				'create_posts'           => 'publish_posts',
				'edit_posts'             => 'edit_posts',
				'edit_published_posts'   => 'edit_published_posts',
				'delete_published_posts' => 'delete_published_posts',
				'edit_others_posts'      => 'edit_others_posts',
				'delete_others_posts'    => 'delete_others_posts',
			),
			'map_meta_cap'          => true,
			'supports'              => array(
				'title',
				'editor',
				'revisions',
			),
		)
	);

	register_post_type(
		'wp_template',
		array(
			'labels'                => array(
				'name'                  => _x( 'Templates', 'post type general name' ),
				'singular_name'         => _x( 'Template', 'post type singular name' ),
				'add_new'               => _x( 'Add New', 'Template' ),
				'add_new_item'          => __( 'Add New Template' ),
				'new_item'              => __( 'New Template' ),
				'edit_item'             => __( 'Edit Template' ),
				'view_item'             => __( 'View Template' ),
				'all_items'             => __( 'Templates' ),
				'search_items'          => __( 'Search Templates' ),
				'parent_item_colon'     => __( 'Parent Template:' ),
				'not_found'             => __( 'No templates found.' ),
				'not_found_in_trash'    => __( 'No templates found in Trash.' ),
				'archives'              => __( 'Template archives' ),
				'insert_into_item'      => __( 'Insert into template' ),
				'uploaded_to_this_item' => __( 'Uploaded to this template' ),
				'filter_items_list'     => __( 'Filter templates list' ),
				'items_list_navigation' => __( 'Templates list navigation' ),
				'items_list'            => __( 'Templates list' ),
			),
			'description'           => __( 'Templates to include in your theme.' ),
			'public'                => false,
			'_builtin'              => true, /* internal use only. don't use this when registering your own post type. */
			'has_archive'           => false,
			'show_ui'               => false,
			'show_in_menu'          => false,
			'show_in_rest'          => true,
			'rewrite'               => false,
			'rest_base'             => 'templates',
			'rest_controller_class' => 'WP_REST_Templates_Controller',
			'capability_type'       => array( 'template', 'templates' ),
			'capabilities'          => array(
				'create_posts'           => 'edit_theme_options',
				'delete_posts'           => 'edit_theme_options',
				'delete_others_posts'    => 'edit_theme_options',
				'delete_private_posts'   => 'edit_theme_options',
				'delete_published_posts' => 'edit_theme_options',
				'edit_posts'             => 'edit_theme_options',
				'edit_others_posts'      => 'edit_theme_options',
				'edit_private_posts'     => 'edit_theme_options',
				'edit_published_posts'   => 'edit_theme_options',
				'publish_posts'          => 'edit_theme_options',
				'read'                   => 'edit_theme_options',
				'read_private_posts'     => 'edit_theme_options',
			),
			'map_meta_cap'          => true,
			'supports'              => array(
				'title',
				'slug',
				'excerpt',
				'editor',
				'revisions',
				'author',
			),
		)
	);

	register_post_type(
		'wp_template_part',
		array(
			'labels'                => array(
				'name'                  => _x( 'Template Parts', 'post type general name' ),
				'singular_name'         => _x( 'Template Part', 'post type singular name' ),
				'add_new'               => _x( 'Add New', 'Template Part' ),
				'add_new_item'          => __( 'Add New Template Part' ),
				'new_item'              => __( 'New Template Part' ),
				'edit_item'             => __( 'Edit Template Part' ),
				'view_item'             => __( 'View Template Part' ),
				'all_items'             => __( 'Template Parts' ),
				'search_items'          => __( 'Search Template Parts' ),
				'parent_item_colon'     => __( 'Parent Template Part:' ),
				'not_found'             => __( 'No template parts found.' ),
				'not_found_in_trash'    => __( 'No template parts found in Trash.' ),
				'archives'              => __( 'Template part archives' ),
				'insert_into_item'      => __( 'Insert into template part' ),
				'uploaded_to_this_item' => __( 'Uploaded to this template part' ),
				'filter_items_list'     => __( 'Filter template parts list' ),
				'items_list_navigation' => __( 'Template parts list navigation' ),
				'items_list'            => __( 'Template parts list' ),
			),
			'description'           => __( 'Template parts to include in your templates.' ),
			'public'                => false,
			'_builtin'              => true, /* internal use only. don't use this when registering your own post type. */
			'has_archive'           => false,
			'show_ui'               => false,
			'show_in_menu'          => false,
			'show_in_rest'          => true,
			'rewrite'               => false,
			'rest_base'             => 'template-parts',
			'rest_controller_class' => 'WP_REST_Templates_Controller',
			'map_meta_cap'          => true,
			'capabilities'          => array(
				'create_posts'           => 'edit_theme_options',
				'delete_posts'           => 'edit_theme_options',
				'delete_others_posts'    => 'edit_theme_options',
				'delete_private_posts'   => 'edit_theme_options',
				'delete_published_posts' => 'edit_theme_options',
				'edit_posts'             => 'edit_theme_options',
				'edit_others_posts'      => 'edit_theme_options',
				'edit_private_posts'     => 'edit_theme_options',
				'edit_published_posts'   => 'edit_theme_options',
				'publish_posts'          => 'edit_theme_options',
				'read'                   => 'edit_theme_options',
				'read_private_posts'     => 'edit_theme_options',
			),
			'supports'              => array(
				'title',
				'slug',
				'excerpt',
				'editor',
				'revisions',
				'author',
			),
		)
	);

	register_post_type(
		'wp_global_styles',
		array(
			'label'        => _x( 'Global Styles', 'post type general name' ),
			'description'  => __( 'Global styles to include in themes.' ),
			'public'       => false,
			'_builtin'     => true, /* internal use only. don't use this when registering your own post type. */
			'show_ui'      => false,
			'show_in_rest' => false,
			'rewrite'      => false,
			'capabilities' => array(
				'read'                   => 'edit_theme_options',
				'create_posts'           => 'edit_theme_options',
				'edit_posts'             => 'edit_theme_options',
				'edit_published_posts'   => 'edit_theme_options',
				'delete_published_posts' => 'edit_theme_options',
				'edit_others_posts'      => 'edit_theme_options',
				'delete_others_posts'    => 'edit_theme_options',
			),
			'map_meta_cap' => true,
			'supports'     => array(
				'title',
				'editor',
				'revisions',
			),
		)
	);

	register_post_type(
		'wp_navigation',
		array(
			'labels'                => array(
				'name'                  => _x( 'Navigation Menus', 'post type general name' ),
				'singular_name'         => _x( 'Navigation Menu', 'post type singular name' ),
				'add_new'               => _x( 'Add New', 'Navigation Menu' ),
				'add_new_item'          => __( 'Add New Navigation Menu' ),
				'new_item'              => __( 'New Navigation Menu' ),
				'edit_item'             => __( 'Edit Navigation Menu' ),
				'view_item'             => __( 'View Navigation Menu' ),
				'all_items'             => __( 'Navigation Menus' ),
				'search_items'          => __( 'Search Navigation Menus' ),
				'parent_item_colon'     => __( 'Parent Navigation Menu:' ),
				'not_found'             => __( 'No Navigation Menu found.' ),
				'not_found_in_trash'    => __( 'No Navigation Menu found in Trash.' ),
				'archives'              => __( 'Navigation Menu archives' ),
				'insert_into_item'      => __( 'Insert into Navigation Menu' ),
				'uploaded_to_this_item' => __( 'Uploaded to this Navigation Menu' ),
				'filter_items_list'     => __( 'Filter Navigation Menu list' ),
				'items_list_navigation' => __( 'Navigation Menus list navigation' ),
				'items_list'            => __( 'Navigation Menus list' ),
			),
			'description'           => __( 'Navigation menus that can be inserted into your site.' ),
			'public'                => false,
			'_builtin'              => true, /* internal use only. don't use this when registering your own post type. */
			'has_archive'           => false,
			'show_ui'               => true,
			'show_in_menu'          => false,
			'show_in_admin_bar'     => false,
			'show_in_rest'          => true,
			'rewrite'               => false,
			'map_meta_cap'          => true,
			'capabilities'          => array(
				'edit_others_posts'      => 'edit_theme_options',
				'delete_posts'           => 'edit_theme_options',
				'publish_posts'          => 'edit_theme_options',
				'create_posts'           => 'edit_theme_options',
				'read_private_posts'     => 'edit_theme_options',
				'delete_private_posts'   => 'edit_theme_options',
				'delete_published_posts' => 'edit_theme_options',
				'delete_others_posts'    => 'edit_theme_options',
				'edit_private_posts'     => 'edit_theme_options',
				'edit_published_posts'   => 'edit_theme_options',
				'edit_posts'             => 'edit_theme_options',
			),
			'rest_base'             => 'navigation',
			'rest_controller_class' => 'WP_REST_Posts_Controller',
			'supports'              => array(
				'title',
				'editor',
				'revisions',
			),
		)
	);

	register_post_status(
		'publish',
		array(
			'label'       => _x( 'Published', 'post status' ),
			'public'      => true,
			'_builtin'    => true, /* internal use only. */
			/* translators: %s: Number of published posts. */
			'label_count' => _n_noop(
				'Published <span class="count">(%s)</span>',
				'Published <span class="count">(%s)</span>'
			),
		)
	);

	register_post_status(
		'future',
		array(
			'label'       => _x( 'Scheduled', 'post status' ),
			'protected'   => true,
			'_builtin'    => true, /* internal use only. */
			/* translators: %s: Number of scheduled posts. */
			'label_count' => _n_noop(
				'Scheduled <span class="count">(%s)</span>',
				'Scheduled <span class="count">(%s)</span>'
			),
		)
	);

	register_post_status(
		'draft',
		array(
			'label'         => _x( 'Draft', 'post status' ),
			'protected'     => true,
			'_builtin'      => true, /* internal use only. */
			/* translators: %s: Number of draft posts. */
			'label_count'   => _n_noop(
				'Draft <span class="count">(%s)</span>',
				'Drafts <span class="count">(%s)</span>'
			),
			'date_floating' => true,
		)
	);

	register_post_status(
		'pending',
		array(
			'label'         => _x( 'Pending', 'post status' ),
			'protected'     => true,
			'_builtin'      => true, /* internal use only. */
			/* translators: %s: Number of pending posts. */
			'label_count'   => _n_noop(
				'Pending <span class="count">(%s)</span>',
				'Pending <span class="count">(%s)</span>'
			),
			'date_floating' => true,
		)
	);

	register_post_status(
		'private',
		array(
			'label'       => _x( 'Private', 'post status' ),
			'private'     => true,
			'_builtin'    => true, /* internal use only. */
			/* translators: %s: Number of private posts. */
			'label_count' => _n_noop(
				'Private <span class="count">(%s)</span>',
				'Private <span class="count">(%s)</span>'
			),
		)
	);

	register_post_status(
		'trash',
		array(
			'label'                     => _x( 'Trash', 'post status' ),
			'internal'                  => true,
			'_builtin'                  => true, /* internal use only. */
			/* translators: %s: Number of trashed posts. */
			'label_count'               => _n_noop(
				'Trash <span class="count">(%s)</span>',
				'Trash <span class="count">(%s)</span>'
			),
			'show_in_admin_status_list' => true,
		)
	);

	register_post_status(
		'auto-draft',
		array(
			'label'         => 'auto-draft',
			'internal'      => true,
			'_builtin'      => true, /* internal use only. */
			'date_floating' => true,
		)
	);

	register_post_status(
		'inherit',
		array(
			'label'               => 'inherit',
			'internal'            => true,
			'_builtin'            => true, /* internal use only. */
			'exclude_from_search' => false,
		)
	);

	register_post_status(
		'request-pending',
		array(
			'label'               => _x( 'Pending', 'request status' ),
			'internal'            => true,
			'_builtin'            => true, /* internal use only. */
			/* translators: %s: Number of pending requests. */
			'label_count'         => _n_noop(
				'Pending <span class="count">(%s)</span>',
				'Pending <span class="count">(%s)</span>'
			),
			'exclude_from_search' => false,
		)
	);

	register_post_status(
		'request-confirmed',
		array(
			'label'               => _x( 'Confirmed', 'request status' ),
			'internal'            => true,
			'_builtin'            => true, /* internal use only. */
			/* translators: %s: Number of confirmed requests. */
			'label_count'         => _n_noop(
				'Confirmed <span class="count">(%s)</span>',
				'Confirmed <span class="count">(%s)</span>'
			),
			'exclude_from_search' => false,
		)
	);

	register_post_status(
		'request-failed',
		array(
			'label'               => _x( 'Failed', 'request status' ),
			'internal'            => true,
			'_builtin'            => true, /* internal use only. */
			/* translators: %s: Number of failed requests. */
			'label_count'         => _n_noop(
				'Failed <span class="count">(%s)</span>',
				'Failed <span class="count">(%s)</span>'
			),
			'exclude_from_search' => false,
		)
	);

	register_post_status(
		'request-completed',
		array(
			'label'               => _x( 'Completed', 'request status' ),
			'internal'            => true,
			'_builtin'            => true, /* internal use only. */
			/* translators: %s: Number of completed requests. */
			'label_count'         => _n_noop(
				'Completed <span class="count">(%s)</span>',
				'Completed <span class="count">(%s)</span>'
			),
			'exclude_from_search' => false,
		)
	);
}