方法一：
php
  function Counter()//定义函数
  {                                   
    $five = "00000";//声明变量，$five,$four等变量表示零的个数，放在数字前边构成6位数
    $four = "0000";
    $three = "000";
    $two = "00";
    $one = "0";
    $counter = "rec.txt";//存放访问数的目的文件，.dat格式
    if(!file_exists($counter))//判断文件是否存在
    {
      $counter = fopen($counter,"w");
      $num = 1;
      fputs($counter,"1");//写入文件
      fclose($counter);
      print "$five"."$num";
    }else{
      $fp = fopen($counter,"r+");
      $num = fgets($fp,"1024");//如果文件存在则读出文件，并加 1
      $num = $num + 1;
      if($num <10)
        print "$five"."$num";
      elseif($num <100)
        print "$four"."$num";
      elseif($num <1000)
        print "$three"."$num";
      elseif($num <10000)
        print "$two"."$num";
      elseif($num <100000)
        print "$one"."$num";
      else
        print "$num";
    }
    $fp = fopen("$counter","w");
    fputs($fp,"$num");
    fclose($fp);
  }
?>

  
    
  
  
    
      
网站访客统计
      欢迎访问CMS***！您是第
      
         
       
      位访客！
    
  

 
方法二：

  
    
  
  
    
      
网站访客统计
      欢迎访问CMS***！您是第 
      
      php
        $counter=1;
        if(file_exists("rec.txt"))
        {
          $fp=fopen("rec.txt","r");
          $counter=fgets($fp,1024);
          $counter++;
          fclose($fp);
        }
        $fp=fopen("rec.txt","w");
        fputs($fp,$counter);
        fclose($fp);
        echo "".$counter."";
      ?>
       
      位访客！