使用php创建和下载文本文件 [英] Create and download a text file using php

问题描述

这是我要做的事情。我有一系列报告，他们也希望能够以逗号分隔的文本文件下载。我已经阅读了一堆页面，人们说只是回声结果，而不是创建一个文件，但是当我尝试它输出到他们所在的页面。

我以每份报告的形式出现

 导出文件< ; input type =checkboxname =exportvalue =1/> 
  

所以在发布时，我可以检查他们是否尝试导出文件。如果他们正在尝试这样做：

  if（$ _ POST ['export'] =='1'）
 {
 $ filename = date（DOB教练 - $ month）。 '。文本'; 
 
 $ content =; 
 
＃CSV文件
 $ content =名称，地址，城市，州，邮政编码，DOB \; （$ i = 0; $ i< count（$ instructors）; $ i ++）
 
 
 $ content。=; //填写内容
 
 fwrite（$ filename，$ content）; 
 
 header（Cache-Control：public）; 
 header（Content-Description：File Transfer）; 
 header（Content-Length：。filesize（$ filename）。;）; 
 header（Content-Disposition：attachment; filename = $ filename）; 
 header（Content-Type：application / octet-stream;）; 
 header（Content-Transfer-Encoding：binary）; 
 
 readfile（$ filename）; 
} 
  

基本上刷新页面，但没有文件被推送下载。任何人都可以指出我失踪了吗？

编辑
我想我还不完全清楚。这不在一个只创建和下载文件的页面上，这个页面也显示在该页面上。所以当我把一个exit（）; readfile后，页面的其余部分加载空白。我也需要在此页面上显示报告。我认为这也可能与为什么不下载，因为这个页面已经发送标题信息。

解决方案

我忽略了在您要求您尝试关闭文件之前，您正在写出内容的方式。

在此查看fwrite手册： http://php.net/manual/en/function.fwrite.php

您需要做的是：

  $ filename =yourfile.txt; 
＃... 
 $ f = fopen（$ filename，'w'）; 
 fwrite（$ f，$ content）; 
 fclose（$ f）; 
  

，关闭文件后，您现在可以安全地将其发送到下载。

  header（Cache-Control：public）; 
 header（Content-Description：File Transfer）; 
 header（Content-Length：。filesize（$ filename）。;）; 
 header（Content-Disposition：attachment; filename = $ filename）; 
 header（Content-Type：application / octet-stream;）; 
 header（Content-Transfer-Encoding：binary）; 
 
 readfile（$ filename）; 
  

有几件事：

• 你真的不需要将内容类型设置为 application / octet-stream 。为什么不设置一个更真实的类型为 text / plain ？


• 我真的不明白你想如何使用日期功能。请参阅手册： http://php.net/manual/en/function。 date.php


• 正如@nickb所正确指出的那样，在执行 readfile（..）

Here's what I'm trying to do. I have a series of reports that they also want to be able to download as comma delimited text files. I've read over a bunch of pages where people say simply echo out the results rather than creating a file, but when I try that it just outputs to the page they are on.

I have this in the form of each report

Export File<input type="checkbox" name="export" value="1" />

So on the post I can check if they are trying to export the file. If they are I was trying to do this:

if($_POST['export'] == '1')
{
    $filename = date("Instructors by DOB - ".$month) . '.txt';

    $content = "";

    # Titlte of the CSV
    $content = "Name,Address,City,State,Zip,DOB\n";

    for($i=0;$i<count($instructors);$i++)
        $content .= ""; //fill content

    fwrite($filename, $content);

    header("Cache-Control: public");
    header("Content-Description: File Transfer");
    header("Content-Length: ". filesize("$filename").";");
    header("Content-Disposition: attachment; filename=$filename");
    header("Content-Type: application/octet-stream; "); 
    header("Content-Transfer-Encoding: binary");

    readfile($filename);
}

Basically the page refreshes, but no file is pushed for download. Can anyone point out what I'm missing?

EDIT I think I wasn't entirely clear. This is not on a page that only creates and downloads the file, this is on a page that is also displaying the report. So when I put an exit(); after the readfile the rest of the page loads blank. I need to display the report on this page as well. I think this could also have to do with why it's not download, because this page has already sent header information.

解决方案

I overlooked the way you are writing out the contents before asking you to try closing the file.

Check the fwrite manual here: http://php.net/manual/en/function.fwrite.php

What you need to do is:

$filename = "yourfile.txt";
#...
$f = fopen($filename, 'w');
fwrite($f, $content);
fclose($f);

and after closing the file, you can now safely send it across for download.

header("Cache-Control: public");
header("Content-Description: File Transfer");
header("Content-Length: ". filesize("$filename").";");
header("Content-Disposition: attachment; filename=$filename");
header("Content-Type: application/octet-stream; "); 
header("Content-Transfer-Encoding: binary");

readfile($filename);

There are a couple of things:

• You really dont need to set the content-type as application/octet-stream. Why not set a more real type as text/plain?
• I really dont understand how you want to use the date functionality. please refer to the manual here: http://php.net/manual/en/function.date.php
• As correctly pointed out by @nickb, you must exit the script after doing the readfile(..)

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