public function out_html($code)

{

        $data['articles'] = $datalist;

        $this->load->helper('file');

        $this->load->view('article',$data);

        $html_data = $this->output->get_output();

        //根据规则生成目录

        $path = '/usr/share/nginx/htdocs/static/www.test.com/'.

               substr($code,0,2).'/'.substr($code,2,3);

        //目录不存在时创建

        if (!is_dir($path)){

            mkdir($path,0755,true);

        }

        $file_path = $path.'/'.$code.'.html';

        if(write_file($file_path,$html_data)){

            echo "success";

        }else{

            echo "error";

        }

}