即使我使用Content-Disposition：inline，PHP也会强制下载PDF文件 [英] PHP forces PDF file download even though I'm using Content-Disposition: inline

问题描述

如果可能的话，我正试图在浏览器中显示PDF - 我知道我可以在Chrome中执行此操作，这正是我正在测试的。问题是，每次我尝试时，都会提示下载相反。

I'm trying to display a PDF in the browser if possible--and I know I can do this in Chrome, which is what I'm testing in. The trouble is, every time I try, it prompts a download instead.

我正在使用PHP会话，所以我知道有一些无关的标题被发送，所以我打电话给 header_remove（）重置所有内容。

I'm using PHP sessions, so I know there are some extraneous headers being sent, so I called header_remove() to reset everything.

我调用此函数来显示PDF：

I call this function to show the PDF:

<?php
// For demonstrative purposes
session_start();

if (!isset($_SESSION['auth'])) {
    header('Location: login.php');
    die;
}

/*
 * void viewPDF (Report $report)
 * Outputs the PDF of the report
 */
function viewPDF ($report) {
        // Tell the browser we are going to serve a PDF file.
    $file = dirname(__FILE__).'/../reports/'.$report->id.'.pdf';
        // The location of the PDF
    if (!file_exists($file)) {
        die ('The PDF does not exist.');
            // Somehow the file does not exist.
    }

    header_remove();
        // I'm using PHP sessions, so remove the headers
        // automatically set that might break something.
    header('Content-Disposition: inline;filename='.$report->id.'.pdf');
    header('Content-Transfer-Encoding: binary');
    header('Content-Type: application/pdf');
    header('Content-Length: '.filesize($file));
    readfile($file);
        // Serve the report PDF file from the reports
        // repository.
    die;
        // Any whitespace could corrupt the PDF, so be extra
        // sure nothing else gets printed.
}

// For demonstrative purposes:
$report = new StdClass;
$report->id = 1;
viewPDF($report);
?>

这些是发送的标题：

Date: Tue, 08 Oct 2013 18:41:32 GMT
Server: Apache/2.2.22 (Win32) PHP/5.4.15
Content-Type: application/pdf
Content-Transfer-Encoding: binary
Content-Disposition: inline;filename=1.pdf
Connection: Keep-Alive
Keep-Alive: timeout=5, max=100
Content-Length: 73464

它仍然提示下载。下载后，我可以在Adobe Reader中打开它。

It's still prompting a download though. Once it downloads, I can open it in Adobe Reader just fine.

我错过了什么吗？

谢谢。

推荐答案

此代码对我有用：

    header('Content-Description: File Transfer');
    header('Content-Type: application/pdf');
    header('Content-Disposition: inline; 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);

这篇关于即使我使用Content-Disposition：inline，PHP也会强制下载PDF文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！