无法下载zip文件在joomla中有内容！延期

Question

我为joomla开发了扩展下载zip文件！ 3.8。我已经创建了zip文件并在其中添加了一些文本文件。我想通过浏览器下载它，但我不能。请帮我！ 我的代码：

$zipName = 'test.zip';
  $zip = new ZipArchive;
  $zip->open($zipName,  ZipArchive::CREATE);
  for($i = 0; $i < count($datas); $i++){
      switch (strtoupper($filetype)){
          case 'XLIFF':
              $filenames[$i] = $filenames[$i].".xlf";
              //create xliff file to add in zip file.
              $this->createXLIFF($datas[$i], $header, $deduplicate, $sourcelanguage, $targetlanguage, $filenames[$i]);
              $zip->addFile(realpath($filenames[$i]),$filenames[$i]);
              break;
      }
  }
  $zip->close();
  @header("Content-Description: File Transfer");
  @header("Content-Type: application/force-download");
  @header("Content-Type: application/octet-stream");
  @header("Content-Type: application/download");
  @header("Content-Disposition: attachment; filename=\"".$zipName."\"");
  @header("Content-Transfer-Encoding: binary");
  @header("Pragma: public");
  @header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
  @header("Content-Length: ".filesize($zipName));
  flush();
  readfile($zipName);
  unlink($zipName);
  foreach ($filenames as $filename){
      unlink($filename);
  }
  exit; 

并输出： output in browser