PHP 创建文件供下载而不保存在服务器上
最终目标：我想创建一个网页，用户可以在其中输入表单信息。有了这些信息，我想通过将给定的信息插入到模板中来创建一个 html 文件（下面称为 test-download.html），然后强制下载。因为我想在即将举行的研讨会上演示这一点，人们将“同时”使用它，所以我不想将文件保存在服务器上，而只是强制下载。
到目前为止： 我的 html 文件 (test.html) 中有这个：
<form action="test.php" method="post">
To file: <input type="text" name="tofile" />
<input type="submit" />
</form>
我的 test.php 中有这个：
<?php
$filename = 'test-download.html';
$htmlcode1 = "<HTML> \n <BODY>";
$htmlcode2 = "</BODY> \n <HTML>";
$somecontent = $htmlcode1.$_POST["tofile"].$htmlcode2;
!$handle = fopen($filename, 'w');
fwrite($handle, $somecontent);
fclose($handle);
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);
?>
这会覆盖文件 test-download.html 文件并强制下载。
问题：如何才能做到这一点而不弄乱服务器上的文件（test-download.html）？
Ultimate goal: I want to create a webpage where a user can enter information in forms. With that information I want to create a html file (below called test-download.html) by inserting the information given into a template and then force a download. Since I want to demonstrate this at an upcoming workshop where people will be using this at the "same time" I would like to not save the file on the server and just force the download.
So far: I have this in my html file (test.html):
<form action="test.php" method="post">
To file: <input type="text" name="tofile" />
<input type="submit" />
</form>
and this in my test.php:
<?php
$filename = 'test-download.html';
$htmlcode1 = "<HTML> \n <BODY>";
$htmlcode2 = "</BODY> \n <HTML>";
$somecontent = $htmlcode1.$_POST["tofile"].$htmlcode2;
!$handle = fopen($filename, 'w');
fwrite($handle, $somecontent);
fclose($handle);
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);
?>
This overwrites the file test-download.html file and forces a download.
Question: How can I do this without messing with a file (the test-download.html) on the server?
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无需将其保存到文件中，只需在发送标头后
echo即可。Instead of saving it to a file, just
echoit after you send the headers.意识到几乎每次 PHP 脚本响应请求时，它都会“生成一个文件”并由浏览器下载。您
echo、print、printf或以其他方式输出到标准输出的任何内容都是该“文件”的内容。您所要做的就是告诉浏览器应该以不同的方式处理“文件”——并且您输出的标头应该已经这样做了。发送标头后，您打印出来的任何内容都将成为下载内容。
Realize that nearly every time a PHP script responds to a request, it's "generating a file" that's downloaded by the browser. Anything you
echo,print,printf, or otherwise put out to standard output is the contents of that "file".All you have to do is tell the browser that the "file" should be handled differently -- and the headers you're outputting should already do that. Once the headers are sent, anything you print out becomes contents of the download.