<?

    @session_start();

    $counter = intval(file_get_contents("counter.dat"));  //创建一个dat数据文件

    if(!$_SESSION['#'])

    {

     $_SESSION['#'] = true;

     $counter++;  //刷新一次+1

     $fp = fopen("counter.dat","w");  //以写入的方式，打开文件，并赋值给变量fp

     fwrite($fp, $counter);   //将变量fp的值+1

     fclose($fp);

    }

?>

<?php echo "$counter";?>

<?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>