$filename = basename($_SERVER["REQUEST_URI"]); $file = basename($filename, ".dmg.gz"); if (file_exists("disk_images/$file.dmg.gz")) { $fp=fopen("counters/$file.txt","r+"); flock($fp,1); $count=fgets($fp,6); $count+=1; rewind($fp); fputs($fp,$count); flock($fp,3); fclose($fp); header ("Content-type: application/octet-stream"); header ("location: http://www.hornware.com/disk_images/$file.dmg.gz"); exit(); } else { echo ""; echo "