PHP код:
$fname = "myfile.gif";
$ftype = "image/gif";
$cname = "counter.txt";
$fp = @fopen($cname,"r+");
$count = @fread($fp, @filesize($cname));
@ftruncate($fp,0);
@rewind($fp);
@fwrite($fp, ++$count);
@fclose($fp);
$fsize = @filesize($fname);
$fp = @fopen($fname,"rb");
$data = @fread($fp, $fsize);
@fclose($fp);
@header("Content-Type: $ftype");
@header("Content-Disposition: attachment; filename=$fname; size=$fsize");
@header("Content-Length: $fsize");
echo $data;