Hier die fertige Lösung:
<?php
$counterFileName = "counter.txt";
$counterstand = (int) file_get_contents($counterFileName);
if ($_SESSION['count'] != 'count') {
$counterstand++;
session_start();
$_SESSION['count']='count';
} else {
fclose ($counterstand);
}
?>
<br><p class="artikel">Besucher:<br><?=$counterstand?></p></body></html>
Danke an Jobo!
Gruß
Laurin