PHP文本文件在下载时前面有数字+意外的文件名 - PHP text file has numbers in front when downloaded + unexpected file name

PHP text file has numbers in front when downloaded + unexpected file name

<?php
$file = fopen("testing.txt","w");
$txt = "Who let the dogs out?! 'r'n";
echo fwrite($file, $txt);
header("Cache-Control: private");
header("Content-Description: File Transfer");
header("Content-Disposition: attachment; filename=$file.txt");
header("Content-Type: text/plain; ");
header("Content-Transfer-Encoding: binary");
readfile('testing.txt');
?>

第一个问题:我在PHP网站(http://php.net/manual/en/function.fopen.php)上读到，可能存在行结束的问题，但是当testing.txt已经下载并打开时，以下行出现在前面添加了一些数字:

25Who let the dogs out?!

第二个问题:我注意到文件名是Resource id #3.txt而不是testing.txt。谷歌搜索显示，该错误消息通常与MySQL/PHP有关，但对我来说只是PHP。

我猜，这是因为你的代码中有这一行

echo fwrite($file, $txt);

试试这个代码

fwrite($file, $txt);

并更正

$filename = 'testing.txt';
header("Content-Disposition: attachment; filename=$filename.txt");