写入字符串文件并强制在PHP下载

Question

我正在研究如何从字符串创建文件的方法，这可能是纯文本将保存为.txt和PHP为.php等，但我希望得到一些洞察到它

**我发现这个代码

$file = 'people.txt'; 
// Open the file to get existing content 
$current = file_get_contents($file); 
// Append a new person to the file 
$current .= "John Smith\n"; 
// Write the contents back to the file 
file_put_contents($file, $current); 

但是我需要有救了我的服务器上people.txt？

力下载部分

header("Content-Disposition: attachment; filename=\"" . basename($File) . "\""); 
header("Content-Type: application/force-download"); 
header("Content-Length: " . filesize($File)); 
header("Connection: close"); 

哪里需要房子上面，我假设的代码是正确的，迫使我下载现成的文件？

Answer 1

您不需要将字符串写入文件以便将其发送到浏览器。请看下面的例子，它会提示你的UA尝试下载一个名为“sample.txt的”含$ str中的值文件：

<?php 

$str = "Some pseudo-random 
text spanning 
multiple lines"; 

header('Content-Disposition: attachment; filename="sample.txt"'); 
header('Content-Type: text/plain'); # Don't use application/force-download - it's not a real MIME type, and the Content-Disposition header is sufficient 
header('Content-Length: ' . strlen($str)); 
header('Connection: close'); 


echo $str;