Carview!

Returns all the possible statuses for a post type.

Parameters

$typestringoptional: The post_type you want the statuses for. Default 'post'.
Default:'post'

string[] An array of all the statuses for the supplied post type.

function get_available_post_statuses( $type = 'post' ) {
	$statuses = wp_count_posts( $type );
	return array_keys( get_object_vars( $statuses ) );
}

Uses	Description
wp_count_posts()`wp-includes/post.php`	Counts number of posts of a post type and if user has permissions to view.

Used by	Description
wp_edit_posts_query()`wp-admin/includes/post.php`	Runs the query to fetch the posts for listing on the edit posts page.

Version	Description
2.5.0	Introduced.