is_post_type_viewable( string|WP_Post_Type $post_type )

Determines whether a post type is considered “viewable”.

Description

For built-in post types such as posts and pages, the ‘public’ value will be evaluated. For all others, the ‘publicly_queryable’ value will be used.

Parameters

$post_type

(Required) Post type name or object.

Return

(bool) Whether the post type should be considered viewable.

Source

File: wp-includes/post.php 

function is_post_type_viewable( $post_type ) {
	if ( is_scalar( $post_type ) ) {
		$post_type = get_post_type_object( $post_type );
		if ( ! $post_type ) {
			return false;
		}
	}

	return $post_type->publicly_queryable || ( $post_type->_builtin && $post_type->public );
}

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Related

Uses

Uses
Uses Description
wp-includes/post.php: get_post_type_object()

Retrieves a post type object by name.

Used By

Used By
Used By Description
wp-includes/general-template.php: wp_get_archives()

Display archive links based on type and format.
wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php: WP_REST_Post_Types_Controller::prepare_item_for_response()

Prepares a post type object for serialization.
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php: WP_REST_Posts_Controller::get_item()

Retrieves a single post.
wp-includes/class-wp-post-type.php: WP_Post_Type::add_rewrite_rules()

Adds the necessary rewrite rules for the post type.
wp-includes/link-template.php: get_preview_post_link()

Retrieves the URL used for the post preview.
wp-includes/class-wp.php: WP::parse_request()

Parse request to find correct ClassicPress query.
wp-admin/includes/class-wp-posts-list-table.php: WP_Posts_List_Table::handle_row_actions()

Generates and displays row action links.
wp-admin/includes/meta-boxes.php: post_submit_meta_box()

Displays post submit form fields.
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Changelog

Changelog
Version Description
WP-4.6.0 Converted the $post_type parameter to accept a WP_Post_Type object.
WP-4.5.0 Added the ability to pass a post type name in addition to object.
WP-4.4.0 Introduced.