PHP force download

 <?php

·         $file = "filename.ext";

·          

·         // Quick check to verify that the file exists

·         if( !file_exists($file) ) die("File not found");

·          

·         // Force the download

·         header("Content-Disposition: attachment; filename="" . basename($file) . """);

·         header("Content-Length: " . filesize($file));

·         header("Content-Type: application/octet-stream;");

·         readfile($file);

·         ?>

https://www.abeautifulsite.net/forcing-file-downloads-in-php