Question

可能重复：
Forcing to download a file using PHP

所以我在卖东西，我想在用户访问感谢页面时开始下载文件。

文件的位置存储在$install，现在当用户访问thanks.php时，如何自动启动文件下载？

感谢。

Answer 1

你想要做的大部分事实上都是用Javascript完成的。

您的PHP代码将提供感谢页面，加载后，您需要使用以下标题将页面中隐藏的iFrame指向一个提供文件作为下载的页面：

header("Content-Type: application/octet-stream");
header("Content-Disposition: attachment; filename=yourfile.txt");
readfile($pathToFile);

Answer 2

<?php
// place this code inside a php file and call it f.e. "download.php"
$path = $_SERVER['DOCUMENT_ROOT']."/path2file/"; // change the path to fit your websites document structure
$fullPath = $path.$_GET['download_file'];
if ($fd = fopen ($fullPath, "r")) {
    $fsize = filesize($fullPath);
    $path_parts = pathinfo($fullPath);
    $ext = strtolower($path_parts["extension"]);
    switch ($ext) {
        case "pdf":
        header("Content-type: application/pdf"); // add here more headers for diff. extensions
        header("Content-Disposition: attachment; filename=\"".$path_parts["basename"]."\""); // use 'attachment' to force a download
        break;
        default;
            header("Content-type: application/octet-stream");
            header("Content-Disposition: filename=\"".$path_parts["basename"]."\"");
    }
    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;
// example: place this kind of link into the document where the file download is offered:
// <a href="download.php?download_file=some_file.pdf">Download here</a>
?>

Answer 3

javascript重定向的替代方法是在HTML中使用meta refresh标记。它甚至在javascript被禁用时也能正常工作。

如何开始下载文件？

3 个答案: