PHP标头在使用变量时返回空格？

Question

I have asked a question earlier but I think I missed the point so I'm gonna post it again.

I'm using the header Content-Disposition.

The code I used to do so was like this:

header("Content-Disposition: attachment; filename='{$name}'");

It returns this:

Content-Disposition attachment; filename=' Bassnectar - Bass Head Official.mp3 '

Note the spaces before and after the quotes. This is a problem because it changes the extension from ".mp3" to ".mp3 " which is recognized as a different file. There has to be some way to fix this. I've changed everything, I've googled everything. I don't know what is left to do?

Answer 1

You should url encode and trim extra whitespace before placing in the header.

$name = rawurlencode(trim($name));
header("Content-Disposition: attachment; filename='{$name}'");

Final Solution

$name = $extract['original_name'];
$name2 = urlencode(trim($name));
$name3 = str_replace("+", " ", $name2);
$quote = '"';
header("Content-Disposition: attachment; filename=$quote{$name3}$quote");

I am pretty sure you could clean this up:

$name = $extract['original_name'];
$name = urlencode(trim($name));
$name = str_replace("+", " ", $name);
header("Content-Disposition: attachment; filename=\"{$name}\"");

And, if the urlencode does not seem to make a difference, I am pretty certain you can just do this:

$name = $extract['original_name'];
$name = trim($name);

header("Content-Disposition: attachment; filename=\"{$name}\"");