is_post_type_viewable() WP 1.0

Determines whether a post type is considered "viewable".

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.

No Hooks.

Return

true/false. Whether the post type should be considered viewable.

Usage

is_post_type_viewable( $post_type );

$post_type(string/WP_Post_Type) (required)

Post type name or object.

Changelog

Code of is post type viewable: wp-includes/post.php ^{WP 5.2.2}

<?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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From tag: Custom post type (post_type)

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