使用php脚本从服务器下载并重命名文件

Question

I am storing all my files like "8asd98asd9as7d98asd9.file" and rerieve the "real" filename from a mysql-database: id (INT) AI PK, pathOnServer TEXT NOT NULL, realFilename VARCHAR(200) NOT NULL.

I need a script which allows me to access the files like "www.website.com/getFile?id=2" which downloads the file and renames it to "realFilename".

How can this be done?

Answer 1

You can use the Content-Disposition HTTP Header to tell the Browser the name of your file and then use readfile to load and echo said file.

header("Content-Type: application/octet-stream");
header('Content-Length: ' . filesize($path));
$name = basename($path);
header('Content-Disposition: attachment; filename="' . $name . '"');
readfile($path); 
exit;

Answer 2

I do believe this code will do a trick you look for

<?php

   if(!is_numeric($_GET['id'])) { // We validate parameter
       echo 'Wrong parameter';
       exit();
   }

   $oDb = new mysqli("ip","user","pass","databasename"); // Connecting to database
   if($oDb->connect_errno) { // Check for an error
      echo 'Error';
      exit();
   }

   $oResult = $oDb->query('SELECT `pathOnServer`, `realFilename`
                           FROM --tablename--
                           WHERE id = '.(int)$_GET['id'].'
                           LIMIT 1'); // make query
   if($oResult->num_rows != 1) {
       echo 'No file found';
       exit();
   }

   $oQuery = $oResult->fetch_object();
   header('Content-disposition: attachment; filename='.$oQuery->realFilename); // put special headers
   readfile($oQuery->pathOnServer.$oQuery->id); // put the file
?>

You could also add the header with filesize. Hope it will help you.