$cfile = "myData.dat";
$fh = fopen($cfile, "r+");
if (!$fh){
die("
Failed to open file $cfile.");
}
$s = fgets($fh, 6);
$count = (int) $s;
$count = $count + 1;
$count = str_pad($count, 6);
rewind($fh);
fwrite($fh, $count);
echo "$count";
fclose($fh);
?>