SimplePie::set_item_limit PHP Method

    public function set_item_limit($limit = 0)
    {
        $this->item_limit = (int) $limit;
    }

 private function get_feed($feed_url)
 {
     $feed = new SimplePie();
     $feed->set_feed_url($feed_url);
     $feed->enable_order_by_date(true);
     $feed->set_item_limit(3);
     $feed->init();
     $feed->handle_content_type();
     return $feed;
 }