Papi_Page_Type::setup_post_types PHP Method

    protected function setup_post_types()
    {
        $this->post_type = papi_to_array($this->post_type);
        // Set a default value to post types array
        // if we don't have a array or a empty array.
        if (empty($this->post_type)) {
            $this->post_type = ['page'];
        }
        if (count($this->post_type) === 1 && $this->post_type[0] === 'any') {
            $this->post_type = get_post_types('', 'names');
            $this->post_type = array_values($this->post_type);
        }
    }