_count_posts_cache_key() WordPress Function

function _count_posts_cache_key( $type = 'post', $perm = '' ) {
	$cache_key = 'posts-' . $type;

	if ( 'readable' === $perm && is_user_logged_in() ) {
		$post_type_object = get_post_type_object( $type );

		if ( $post_type_object && ! current_user_can( $post_type_object->cap->read_private_posts ) ) {
			$cache_key .= '_' . $perm . '_' . get_current_user_id();
		}
	}

	return $cache_key;
}
Uses	Description
wp-includes/capabilities.php:current_user_can()	Returns whether the current user has the specified capability.
wp-includes/pluggable.php:is_user_logged_in()	Determines whether the current visitor is a logged in user.
wp-includes/user.php:get_current_user_id()	Gets the current user’s ID.
wp-includes/post.php:get_post_type_object()	Retrieves a post type object by name.
Used By	Description
wp-includes/post.php:_transition_post_status()	Hook for managing future post transitions to published.
wp-includes/post.php:wp_count_posts()	Count number of posts of a post type and if user has permissions to view.