simple_html_dom::save PHP Method

    function save($filepath = '')
    {
        $ret = $this->root->innertext();
        if ($filepath !== '') {
            file_put_contents($filepath, $ret, LOCK_EX);
        }
        return $ret;
    }

 public function parse($isUpdate = false)
 {
     Ibos::import("application.extensions.simple_html_dom", true);
     if ($isUpdate) {
         $model = preg_replace("/\\s+data-id\\s?=\\s?\"?\\d+\"?/i", "", $this->printmodel);
         $max = 0;
     } else {
         $model = $this->printmodel;
         $max = intval($this->itemmax);
     }
     $elements = array();
     $doc = new simple_html_dom();
     $doc->load($model, true, true, CHARSET);
     $items = $doc->find("ic");
     $config = $this->getItemConfig();
     if (!empty($items) && !empty($config)) {
         $this->refactor($items, $config, $max, $elements);
     }
     $html = $doc->save();
     $this->_cache = $elements;
     CacheUtil::set("form_" . $this->ID, $elements);
     $form["printmodelshort"] = $html;
     if ($max != $this->itemmax) {
         $form["itemmax"] = $max;
     }
     $doc->clear();
     FlowFormType::model()->modify($this->ID, $form);
 }