Using PHP variables in document header

Question

I am trying to get php variables inserted into the code below. When the document download pop up shows up it shows $filename instead of the actual file name. How can i achieve this?

code:

<?php
header('Content-disposition: attachment; filename=$filename');
header('Content-type: $type');
readfile('$filename');
?>

Answer 1

You're using single quotes. Variables inside string literals using single quotes are not evaluated. Use concatenation or double quotes instead.

<?php
header("Content-disposition: attachment; filename=$filename"); // double quotes
header('Content-type: ' . $type); // concatenation
readfile($filename); // no quotes needed
?>

See the PHP manual page for the String type.