Attempt to rewrite the code

g.php

@@ -0,0 +1,19 @@
+<?php
+	@ini_set('zlib.output_compression', 'Off');
+	@ini_set('output_buffering', 'Off');
+	@ini_set('output_handler', '');
+	header('HTTP/1.1 200 OK');
+	header('Content-Description: File Transfer');
+	header('Content-Type: application/octet-stream');
+	header('Content-Disposition: attachment; filename=random.dat');
+	header('Content-Transfer-Encoding: binary');
+	header('Cache-Control: no-store, no-cache, must-revalidate, max-age=0');
+	header('Cache-Control: post-check=0, pre-check=0', false);
+	header('Pragma: no-cache');
+	$data = openssl_random_pseudo_bytes(1048576);
+	$chunks = 4;
+	for($i = 0; $i < $chunks; $i++){
+		echo $data;
+		flush();
+	}
+?>