如何在PHP中返回文件 [英] How to return a file in PHP

问题描述

我有一个文件

/file.zip

用户来

/download.php

我希望用户的浏览器开始下载文件.我怎么做? readfile是否在服务器上打开文件，这似乎是不必要的事情.有没有一种方法可以在不打开服务器的情况下返回文件?

I want the user's browser to start downloading the file. How do i do that? Does readfile open the file on server, which seems like an unnecessary thing to do. Is there a way to return the file without opening it on the server?

推荐答案

我认为您想要这样做:

        $attachment_location = $_SERVER["DOCUMENT_ROOT"] . "/file.zip";
        if (file_exists($attachment_location)) {

            header($_SERVER["SERVER_PROTOCOL"] . " 200 OK");
            header("Cache-Control: public"); // needed for internet explorer
            header("Content-Type: application/zip");
            header("Content-Transfer-Encoding: Binary");
            header("Content-Length:".filesize($attachment_location));
            header("Content-Disposition: attachment; filename=file.zip");
            readfile($attachment_location);
            die();        
        } else {
            die("Error: File not found.");
        } 

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