Question

我从来没有写过PHP下载文件脚本也没有任何经验，我真的不是专业人士。我从另一个网站上看到了以下代码片段，并尝试使用它。我理解脚本中写的是什么，但我只是没有得到错误的消息或者更确切地说，我不知道如何防止这些。

这是download.php脚本 - 我把它放在我主域下面的/ download /文件夹中：

<?php

ignore_user_abort(true);
set_time_limit(0); // disable the time limit for this script

$path = "/downloads/"; // change the path to fit your websites document structure

$dl_file = preg_replace("([^\w\s\d\-_~,;:\[\]\(\).]|[\.]{2,})", '', $_GET['download_file']); // simple file name validation
$dl_file = filter_var($dl_file, FILTER_SANITIZE_URL); // Remove (more) invalid characters
$fullPath = $path.$dl_file;

if ($fd = fopen ($fullPath, "r")) {
$fsize = filesize($fullPath);
$path_parts = pathinfo($fullPath);
$ext = strtolower($path_parts["extension"]);
switch ($ext) {
    case "pdf":
    header("Content-type: application/pdf");
    header("Content-Disposition: attachment; filename=\"".$path_parts["basename"]."\""); // use 'attachment' to force a file download
    break;
    // add more headers for other content types here
    default;
    header("Content-type: application/octet-stream");
    header("Content-Disposition: filename=\"".$path_parts["basename"]."\"");
    break;
}
header("Content-length: $fsize");
header("Cache-control: private"); //use this to open files directly
while(!feof($fd)) {
    $buffer = fread($fd, 2048);
    echo $buffer;
}
}
fclose ($fd);
exit;

现在在/ download /文件夹中，其中包含download.php我有一个文件夹/ downloads，其中包含应该下载的.pdf文件。

我在网页上使用的链接是： PHP download file（为什么不显示，包括4个空格：

现在，当我点击链接时出现以下错误：

Warning: Cannot set max_execution_time above master value of 30 (tried to set unlimited) in /var/www/xxx/html/download/download.php on line 4

Warning: fopen(/downloads/test.pdf): failed to open stream: No such file or directory in /var/www/xxx/html/download/download.php on line 12

Warning: fclose() expects parameter 1 to be resource, boolean given in /var/www/xxx/html/download/download.php on line 34

如果我对$ path变量使用绝对路径（https://www.my-domain.de/downloads/），我会收到以下错误：

Warning: Cannot set max_execution_time above master value of 30 (tried to set unlimited) in /var/www/xxx/html/download/download.php on line 4

Warning: fopen(): https:// wrapper is disabled in the server configuration by allow_url_fopen=0 in /var/www/xxx/html/download/download.php on line 12

Warning: fopen(https://www.my-domain.de/downloads/test.pdf): failed to open stream: no suitable wrapper could be found in /var/www/xxx/html/download/download.php on line 12

Warning: fclose() expects parameter 1 to be resource, boolean given in /var/www/xxx/html/download/download.php on line 34

我很感谢任何建议！

Answer 1

<?php

ignore_user_abort(true);
//set_time_limit(0); disable the time limit for this script

$path = "downloads/"; // change the path to fit your websites document structure

$dl_file = preg_replace("([^\w\s\d\-_~,;:\[\]\(\).]|[\.]{2,})", '', $_GET['download_file']); // simple file name validation
$dl_file = filter_var($dl_file, FILTER_SANITIZE_URL); // Remove (more) invalid characters
$fullPath = $path.$dl_file;

if ($fd = fopen ($fullPath, "r")) {
$fsize = filesize($fullPath);
$path_parts = pathinfo($fullPath);
$ext = strtolower($path_parts["extension"]);
switch ($ext) {
    case "pdf":
    header("Content-type: application/pdf");
    header("Content-Disposition: attachment; filename=\"".$path_parts["basename"]."\""); // use 'attachment' to force a file download
    break;
    // add more headers for other content types here
    default;
    header("Content-type: application/octet-stream");
    header("Content-Disposition: filename=\"".$path_parts["basename"]."\"");
    break;
}
header("Content-length: $fsize");
header("Cache-control: private"); //use this to open files directly
while(!feof($fd)) {
    $buffer = fread($fd, 2048);
    echo $buffer;
}
}
fclose ($fd);
exit;
?>

尝试此代码您的服务器可能不允许您无限期地执行最大持续时间。在php.ini文件中检查而且相对路径是错误的，“ https://www.my-domain.de/downloads/”不是路径，它是服务器的网址

PHP下载文件脚本（不起作用）

1 个答案: