In my project there is a part where when the user click a button, it downloads a .txt file containing some strings. I run this code in a file .php. The .php file creates ever the .txt file but it doesn't download it into the broswer.
<?php
$outString = "write here";
$file = "test.txt";
$txt = fopen($file, "w") or die("Unable to open file!");
fwrite($txt, $outString);
fclose($txt);
header('Content-Description: File Transfer');
header('Content-Disposition: attachment; filename='.basename($file));
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
header("Content-Type: text/plain");
readfile($file);
?>