<?php

    @session_start();  

    $counter = intval(file_get_contents("counter.dat"));  

    if(!$_SESSION['#'])  

    {  

     $_SESSION['#'] = true;  

     $counter++;  

     $fp = fopen("counter.dat","w");  

     fwrite($fp, $counter);  

     fclose($fp);  

    }  

 ?>

<p align="center">您是到访的第<?php echo "$counter";?>位用户</p>