File Directory Php

This is meant for sites that do not run a db and instead, use a file and a cookie. It isn't the best I've seen but it's simple. Consider this as a tutorial. :)
Just create a file called counter.txt and put this where you want to display the counter.
Remember to set the permissions on counter.txt so that your webserver can write to the file.
$visitor_ip = $HTTP_COOKIE_VARS["user_ip"];
$counter = "counter.txt";
$counter_file_line = file($counter);
if(!$vistor_ip)
{
setcookie("user_ip", $REMOTE_ADDR, time()+360000);
$counter_file_line[0]++;
$cf = fopen($counter, "w+");
fputs($cf, "$counter_file_line[0]");
fclose($cf);
}
elseif($vistor_ip != $REMOTE_ADDR)
{
$counter_file_line[0]++;
$cf = fopen($counter, "w+");
fputs($cf, "$counter_file_line[0]");
fclose($cf);
}
?>