public function downLoad($dataUrl,$saveName)
  {
    $datalist = [
      ROOT_PATH.'/public/introduce/110.docx',
      ROOT_PATH.'/public/upfile/110.zip'
    ];
//    print_r($datalist);die;
    $filename = ROOT_PATH.'\public\/'.$saveName.'.zip';
    if(file_exists($filename)){
      unlink($filename);
    }

    $zip = new \ZipArchive();
    if ($zip->open($filename,\ZipArchive::CREATE)!== true){
      exit('无法打开文件，或者文件创建失败');
    }

    foreach ($dataUrl as $index => $item) {
      if (DIRECTORY_SEPARATOR=='\\'){
        $item = str_replace('/',DIRECTORY_SEPARATOR,$item);
        $filename = str_replace('/',DIRECTORY_SEPARATOR,$filename);
      }
//      var_dump($item);
//      var_dump(file_exists($item));die;
      if (file_exists($item)){
        $zip->addFile($item,basename($item));
      }
    }

    $zip->close();
    if(!file_exists($filename)){
      exit("无法找到文件"); //即使创建，仍有可能失败
    }
    header('Content-Type: application/zip');
    header('Content-disposition: attachment; filename='.basename($filename));
    header('Content-Length: ' . filesize($filename));
    @readfile($filename);
　　　　　@unlink ( $filename );
}

public function unzip_file($file, $dir){ 

    // 实例化对象 

    $zip = new ZipArchive() ; 

    //打开zip文档，如果打开失败返回提示信息 

    if ($zip->open($file) !== TRUE) { 

     die ("Could not open archive"); 

    } 

    //将压缩文件解压到指定的目录下 

    $zip->extractTo($dir); 

    //关闭zip文档 

    $zip->close(); 

  }

public function loopFun($dir) 

  { 

    $handle = opendir($dir.".");

    //定义用于存储文件名的数组

    $array_file = array();

    while (false !== ($file = readdir($handle)))

    {

      if ($file != "." && $file != "..") {

        $array_file[] = $dir.'/'.$file; //输出文件名

      }

    }

    closedir($handle);

    return $array_file;

    //print_r($array_file);

  }