PHP로 파일을 강제로 다운로드하는 방법

PHP로 파일을 강제로 다운로드하는 방법

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PHP로 웹 페이지를 방문하는 사용자에게 파일을 다운로드해야합니다. 와 관련이 있다고 생각 file_get_contents하지만 실행 방법을 잘 모르겠습니다.

$url = "http://example.com/go.exe";

파일을 다운로드 한 후 header(location)다른 페이지로 리디렉션되지 않습니다. 그냥 멈춰요.

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내장 PHP 함수 readfile 에 대한 문서 읽기

$file_url = 'http://www.myremoteserver.com/file.exe';
header('Content-Type: application/octet-stream');
header("Content-Transfer-Encoding: Binary"); 
header("Content-disposition: attachment; filename=\"" . basename($file_url) . "\""); 
readfile($file_url); // do the double-download-dance (dirty but worky)

또한 파일 응용 프로그램 / zip, 응용 프로그램 / pdf 등을 기반으로 올바른 내용 유형을 추가해야합니다. 그러나 다른 이름으로 저장 대화 상자를 트리거하지 않으려는 경우에만 해당됩니다.

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header("Content-Type: application/octet-stream");
header("Content-Transfer-Encoding: Binary");
header("Content-disposition: attachment; filename=\"file.exe\""); 
echo readfile($url);

맞다

또는 exe 유형의 파일에 더 적합

header("Location: $url");

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<?php
$file = "http://example.com/go.exe"; 

header("Content-Description: File Transfer"); 
header("Content-Type: application/octet-stream"); 
header("Content-Disposition: attachment; filename=" . basename($file)); 

readfile ($file);
exit(); 
?>

또는 브라우저에서 파일을 열 수없는 경우 Location헤더를 사용하면됩니다 .

<?php header("Location: http://example.com/go.exe"); ?>

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파일을 먼저 표시하고 그 값을 url로 설정하십시오.

index.php

<a href="download.php?download='.$row['file'].'" title="Download File">

download.php

<?php
/*db connectors*/
include('dbconfig.php');

/*function to set your files*/
function output_file($file, $name, $mime_type='')
{
    if(!is_readable($file)) die('File not found or inaccessible!');
    $size = filesize($file);
    $name = rawurldecode($name);
    $known_mime_types=array(
        "htm" => "text/html",
        "exe" => "application/octet-stream",
        "zip" => "application/zip",
        "doc" => "application/msword",
        "jpg" => "image/jpg",
        "php" => "text/plain",
        "xls" => "application/vnd.ms-excel",
        "ppt" => "application/vnd.ms-powerpoint",
        "gif" => "image/gif",
        "pdf" => "application/pdf",
        "txt" => "text/plain",
        "html"=> "text/html",
        "png" => "image/png",
        "jpeg"=> "image/jpg"
    );

    if($mime_type==''){
        $file_extension = strtolower(substr(strrchr($file,"."),1));
        if(array_key_exists($file_extension, $known_mime_types)){
            $mime_type=$known_mime_types[$file_extension];
        } else {
            $mime_type="application/force-download";
        };
    };
    @ob_end_clean();
    if(ini_get('zlib.output_compression'))
    ini_set('zlib.output_compression', 'Off');
    header('Content-Type: ' . $mime_type);
    header('Content-Disposition: attachment; filename="'.$name.'"');
    header("Content-Transfer-Encoding: binary");
    header('Accept-Ranges: bytes');

    if(isset($_SERVER['HTTP_RANGE']))
    {
        list($a, $range) = explode("=",$_SERVER['HTTP_RANGE'],2);
        list($range) = explode(",",$range,2);
        list($range, $range_end) = explode("-", $range);
        $range=intval($range);
        if(!$range_end) {
            $range_end=$size-1;
        } else {
            $range_end=intval($range_end);
        }

        $new_length = $range_end-$range+1;
        header("HTTP/1.1 206 Partial Content");
        header("Content-Length: $new_length");
        header("Content-Range: bytes $range-$range_end/$size");
    } else {
        $new_length=$size;
        header("Content-Length: ".$size);
    }

    $chunksize = 1*(1024*1024);
    $bytes_send = 0;
    if ($file = fopen($file, 'r'))
    {
        if(isset($_SERVER['HTTP_RANGE']))
        fseek($file, $range);

        while(!feof($file) &&
            (!connection_aborted()) &&
            ($bytes_send<$new_length)
        )
        {
            $buffer = fread($file, $chunksize);
            echo($buffer);
            flush();
            $bytes_send += strlen($buffer);
        }
        fclose($file);
    } else
        die('Error - can not open file.');
    die();
}
set_time_limit(0);

/*set your folder*/
$file_path='uploads/'."your file";

/*output must be folder/yourfile*/

output_file($file_path, ''."your file".'', $row['type']);

/*back to index.php while downloading*/
header('Location:index.php');
?>

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In case you have to download a file with a size larger than the allowed memory limit (memory_limit ini setting), which would cause the PHP Fatal error: Allowed memory size of 5242880 bytes exhausted error, you can do this:

// File to download.
$file = '/path/to/file';

// Maximum size of chunks (in bytes).
$maxRead = 1 * 1024 * 1024; // 1MB

// Give a nice name to your download.
$fileName = 'download_file.txt';

// Open a file in read mode.
$fh = fopen($file, 'r');

// These headers will force download on browser,
// and set the custom file name for the download, respectively.
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="' . $fileName . '"');

// Run this until we have read the whole file.
// feof (eof means "end of file") returns `true` when the handler
// has reached the end of file.
while (!feof($fh)) {
    // Read and output the next chunk.
    echo fread($fh, $maxRead);

    // Flush the output buffer to free memory.
    ob_flush();
}

// Exit to make sure not to output anything else.
exit;

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A modification of the accepted answer above, which also detects the MIME type in runtime:

$finfo = finfo_open(FILEINFO_MIME_TYPE);
header('Content-Type: '.finfo_file($finfo, $path));

$finfo = finfo_open(FILEINFO_MIME_ENCODING);
header('Content-Transfer-Encoding: '.finfo_file($finfo, $path)); 

header('Content-disposition: attachment; filename="'.basename($path).'"'); 
readfile($path); // do the double-download-dance (dirty but worky)

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The following code is a correct way of implementing a download service in php as explained in the following tutorial

header('Content-Type: application/zip');
header("Content-Disposition: attachment; filename=\"$file_name\"");
set_time_limit(0);
$file = @fopen($filePath, "rb");
while(!feof($file)) {
    print(@fread($file, 1024*8));
    ob_flush();
    flush();
}

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try this:

header('Content-type: audio/mp3'); 
header('Content-disposition: attachment; 
filename=“'.$trackname'”');                             
readfile('folder name /'.$trackname);          
exit();

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http://php.net/manual/en/function.readfile.php

That's all you need. "Monkey.gif" change to your file name. If you need to download from other server, "monkey.gif" change to "http://www.exsample.com/go.exe"

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You can stream download too which will consume significantly less resource. example:

$readableStream = fopen('test.zip', 'rb');
$writableStream = fopen('php://output', 'wb');

header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="test.zip"');
stream_copy_to_stream($readableStream, $writableStream);
ob_flush();
flush();

In the above example, I am downloading a test.zip (which is actually the android studio zip on my local machine). php://output is a write-only stream (generally used by echo or print). after that, you just need to set the required headers and call stream_copy_to_stream(source, destination). stream_copy_to_stream() method acts as a pipe which takes the input from the source stream (read stream) and pipes it to the destination stream (write stream).

참고URL : https://stackoverflow.com/questions/7263923/how-to-force-file-download-with-php