ob_implicit_flush(); for ($i=0; $i<10; $i++) { echo "Processing... ".$i."
"; flush(); sleep(1); } echo "Done!";
ignore_user_abort(true); set_time_limit(0); $file_url = 'http://example.com/large_file.zip'; header('Content-Type: application/octet-stream'); header("Content-Transfer-Encoding: Binary"); header('Content-Disposition: attachment; filename="'.basename($file_url).'"'); flush(); readfile($file_url); exit;In this example, we are using ignore_user_abort() to make sure the script continues to run even if the user leaves the page. We are also using set_time_limit() to prevent the script from timing out. Then, we are using headers to set the content type, transfer encoding, and disposition to force a download. We are also using flush() to send the headers immediately to the browser. Finally, we are using readfile() to send the file contents to the browser. Package library: This is a built-in PHP functionality.