原文：http://www6.blog.163.com/article/-2jc4-wWsVhP.html

<?php
require_once('config.php');
function counter()
{ 
 session_start();
 $sql="select counter from counter";
 $result=@mysql_query($sql);
 if(!empty($result))
 {
  $row=mysql_fetch_array($result);
  $counter=++$row[counter];
  if(!$_SESSION['counter'])
  {
   $query="update counter set counter=$counter";
   $result=@mysql_query($query);
   if($result)
   {
    $_SESSION['counter']=true;
   }
  }
  $counter_len=strlen($counter);
  for($i=0;$i<$counter_len;$i++)
  {
   $number=substr($counter,$i,1);
   if(isset($number))
   {
    echo "<img src='image/".$number.".gif'>";
   }
  }
 }
}
?>