如何将下载zip保存到laravel中的公共文件夹

Question

我想用下面的代码将文件夹下载为 ZIP 格式。

实际上，这非常适合下载文件夹以压缩。

但是我希望zip文件也保存到公共/文件夹中的公共文件夹中。我使用Laravel和ZipArchive

请帮助我

 public function downloadzip($id_pra) {
     $dcmt = DB::table('document')->select(DB::raw(" max(id) as id"))->where('id_praapplication',$id_pra)->groupBy('type')->pluck('id');
     $files = Document::whereIn('id', $dcmt)->get(); 
     $url = url('')."/storage/uploads/file/".$id_pra."/"; 
     # create new zip opbject
     $zip = new ZipArchive();
     # create a temp file & open it
     $tmp_file = tempnam('.','');
     $zip->open($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();
     # send the file to the browser as a download
     ob_start();
     $strFile = file_get_contents($tmp_file);         
     header('Content-disposition: attachment; filename=DOC-'.$id_pra.'-'.$url.'.zip');
     header('Content-type: application/zip');
     echo $tmp_file;
     while (ob_get_level()) {
         ob_end_clean();
     }
     readfile($tmp_file);
     exit;   
}

Answer 1

无需创建临时文件，您可以直接创建 ZIP 文件，然后使用文件系统 API 下载它。

public function downloadzip($id_pra) {
     $dcmt = DB::table('document')->select(DB::raw(" max(id) as id"))->where('id_praapplication',$id_pra)->groupBy('type')->pluck('id');
     $files = Document::whereIn('id', $dcmt)->get(); 
     $url = url('')."/storage/uploads/file/".$id_pra."/"; 
     // create new zip object
     $zip = new ZipArchive();
     // store the public path
     $publicDir = public_path();
     // Define the file name. Give it a unique name to avoid overriding.
     $zipFileName = 'Documents.zip';
     // Create the ZIP file directly inside the desired folder. No need for a temporary file.
     if ($zip->open($publicDir . '/folder/' . $zipFileName, ZipArchive::CREATE) === true) {
         // Loop through each file
         foreach($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();
     }
     // Download the file using the Filesystem API
     $filePath = $publicDir . '/folder/' . $zipFileName;
     if (file_exists($filePath)) {
         return Storage::download($filePath);
     }
}

注意：

我会将 CURL 部分提取到返回下载文件的方法fetchFile($url);，但这超出了这个问题的范围。