1、在根目录新增counter.dat文件

2、在底部增加以下代码

<?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); 
 } 
?>

您是到访的第<?php echo "$counter";?>位用户