如何在没有临时文件的情况下强制 zip 下载？答案

【问题标题】：how to force zip to dowload without temp file?如何在没有临时文件的情况下强制 zip 下载？
【发布时间】：2020-11-08 13:33:05
【问题描述】：

我想制作动态 zip，所以当管理员点击 .zip 时，它将根据用户 ud 下载并压缩文件夹中的所有文件用户将拥有文档并使用其 ID 存储在文件夹中

即/public/stroage/file/ID001，所以当用户点击按钮下载时，它将强制下载ID0001.zip

这是我的代码

   $zip = new \ZipArchive();

 $uploaddir = public_path().'/temp'; 

        $tmp_file = tempnam($uploaddir,'');
        $zip->open($tmp_file, \ZipArchive::CREATE);
             
         // Loop through each file
                foreach($files as $file){
                     $url2 = $url.$file->upload;
                     $url2 = str_replace(' ', '%20', $url2);

                        if (!function_exists('curl_init')){ 
                            die('CURL is not installed!');
                        }

                     $ch = curl_init();
                     curl_setopt($ch, CURLOPT_URL, $url2);
                     curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
                     $output = curl_exec($ch);
                     curl_close($ch);
                     $download_file = $output;

                     $type = substr($url2, -5, 5); 
                     #add it to the zip
                     $zip->addFromString(basename($url.$file->upload.'.'.$type),$download_file);
                }
                // close zip
                $zip->close();
            

        
                // Set Time Download
                date_default_timezone_set("Asia/Kuala_Lumpur");
                $time_name = date('Ymd');
                $time_download = date('Y-m-d H:i:s');
                $log_download = new Log_download;
                
                $user = Auth::user();
                $id_user =  $user->id;
                $log_download->id_praapplication   =  $id_pra;
                $log_download->id_user   =  $id_user;
                $log_download->Activity   =  'Download ZIP File';
                $log_download->type   =  'Zip Archive';
                $log_download->downloaded_at   =  $time_download;
                $log_download->save();
                
                # send the file to the browser as a download
               ob_start();
               $strFile = file_get_contents($tmp_file);         

                header('Content-disposition: attachment; filename=DOC-'.$id_pra.'-'.'.zip');
                header('Content-type: application/zip');
                  echo $tmp_file;
                  while (ob_get_level()) {
                    ob_end_clean();
                  }
                  readfile($tmp_file);  

                //$filetopath=$public_dir.'/'.$zipFileName;
               //$filetopath = public_path().'/storage/uploads/file/'. $id_pra.'/'.$zipFileName;
                    // Create Download Response
                   // if(file_exists($filetopath)){
                       // return response()->download($filetopath,$zipFileName,$headers);
                    //} 
                exit;

实际上这段代码有效。但是我点击的每个下载 zip 的 utton 都会在文件夹 /public 中创建一个临时文件。如何在不创建临时文件的情况下下载 zip，或者我可以创建 /public/tmp 之类的文件夹并将所有临时 zip 保存到该文件夹中？

【问题讨论】：

标签： php laravel public ziparchive tmp

【解决方案1】：

你应该可以做到$zip->open('php://output', \ZipArchive::CREATE);。完整代码：

   header('Content-disposition: attachment; filename=DOC-'.$id_pra.'-'.'.zip');
   header('Content-type: application/zip');
   $zip = new \ZipArchive();
   $zip->open('php://output', \ZipArchive::CREATE);
             
   // Loop through each file
   foreach($files as $file){
      $url2 = $url.$file->upload;
      $url2 = str_replace(' ', '%20', $url2);

      if (!function_exists('curl_init')){ 
      die('CURL is not installed!');
   }

   $ch = curl_init();
   curl_setopt($ch, CURLOPT_URL, $url2);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
   $output = curl_exec($ch);
   curl_close($ch);
   $download_file = $output;
   $type = substr($url2, -5, 5); 
   #add it to the zip
   $zip->addFromString(basename($url.$file->upload.'.'.$type),$download_file);
}
// close zip
$zip->close();
            

        
// Set Time Download
date_default_timezone_set("Asia/Kuala_Lumpur");
$time_name = date('Ymd');
$time_download = date('Y-m-d H:i:s');
$log_download = new Log_download;
                
$user = Auth::user();
$id_user =  $user->id;
$log_download->id_praapplication   =  $id_pra;
$log_download->id_user   =  $id_user;
$log_download->Activity   =  'Download ZIP File';
$log_download->type   =  'Zip Archive';
$log_download->downloaded_at   =  $time_download;
$log_download->save();

exit;

但是，zip 文件大小不应超过 PHP 最大内存限制。如果是这样，您最终会得到损坏的 zip 文件。

【讨论】：