codice:
<?php
$filename="some.txt";
if(!file_exists($filename)) {
  $num=0;
} else {
  $handle=fopen($filename,"r");
  $num = fread($handle, filesize($filename));
  fclose($handle);  
}
$num++;
print("Visitatori:".$num);

$handle=fopen("some.txt","w");
fwrite($handle,$num);
fclose($handle);
?>
potevi arrivarci anche da solo...