如何使用php將字符串作為文件發送到瀏覽器？

Question

我想在內存中創建一個文件，並在單擊按鈕時將其發送到瀏覽器。 我期待以下代碼來做到這一點：

<?php

$content = 'This is supposed to be working... dammit';
$length = strlen($content);

header('Content-Description: File Transfer');
header('Content-Type: application/pdf');
header('Content-Disposition: attachment; filename=testfile.txt');
header('Content-Transfer-Encoding: binary');
header('Content-Length: ' . $length);
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Expires: 0');
header('Pragma: public');

echo $content;
exit;

?>

相反，我得到了回聲的字符串。 什么是我的愚蠢新手錯誤？

Answer 1

您需要更改內容類型，這適用於我，在FF和Chrome上測試

<?php 
$content = 'This is supposed to be working... dammit';
$length = strlen($content);

header('Content-Description: File Transfer');
header('Content-Type: text/plain');//<<<<
header('Content-Disposition: attachment; filename=testfile.txt');
header('Content-Transfer-Encoding: binary');
header('Content-Length: ' . $length);
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Expires: 0');
header('Pragma: public');

echo $content;
exit;
?>

Answer 2

“請記住，在發送任何實際輸出之前必須調用header（）”（ c ）