如何使用php从数据库/文件夹下载文件

Question

上传的文件将存储在数据库和文件夹中(文件夹名称:上传).现在我想知道如何从数据库/文件夹创建下载文件.我有两个文件butangDonload.php和download.php.当用户点击"donload"字样时,弹出框将出现并保存文件.

butangDonload.php

<?php

    $file = "Bang.png"; //Let say If I put the file name Bang.png
    echo "<a href='download.php?nama=".$file."'>donload</a> ";

?>

的download.php

<?php
    $name= $_GET['nama'];
    download($name);

    function download($name) {
        $file = $nama_fail;

        if (file_exists($file)) {
            header('Content-Description: File Transfer');
            header('Content-Type: application/octet-stream');
            header('Content-Disposition: attachment; filename='.basename($file));
            header('Content-Transfer-Encoding: binary');
            header('Expires: 0');
            header('Cache-Control: must-revalidate');
            header('Pragma: public');
            header('Content-Length: ' . filesize($file));
            ob_clean();
            flush();
            readfile($file);
            exit;
        }
    }
?>

Answer 1

我已经改变了你的代码,很少修改将很好.这是代码:

butangDonload.php

<?php
$file = "logo_ldg.png"; //Let say If I put the file name Bang.png
echo "<a href='download1.php?nama=".$file."'>download</a> ";
?>

的download.php

<?php
$name= $_GET['nama'];

    header('Content-Description: File Transfer');
    header('Content-Type: application/force-download');
    header("Content-Disposition: attachment; filename=\"" . basename($name) . "\";");
    header('Content-Transfer-Encoding: binary');
    header('Expires: 0');
    header('Cache-Control: must-revalidate');
    header('Pragma: public');
    header('Content-Length: ' . filesize($name));
    ob_clean();
    flush();
    readfile("your_file_path/".$name); //showing the path to the server where the file is to be download
    exit;
?>

在这里,您需要显示要下载文件的路径.ie将只提供文件名,但需要提供用于读取该文件的文件路径.因此,它应该被我已经使用您的代码进行测试所取代,并且修改也将起作用.

Answer 2

butangDonload.php

$file = "Bang.png"; //Let say If I put the file name Bang.png
$_SESSION['name']=$file;    

尝试这个，

<?php

$name=$_SESSION['name'];
download($name);

function download($name){
$file = $nama_fail;
?>