$jishu="jishu.txt";
if(!file_exists($jishu))
{
 $kjs = fopen($jishu,"w");
 fwrite($kjs,0);
 fclose($kjs);
}
function kaishi($jishu)
{
 $js = fopen($jishu,"r");
 $du = fread($js,8);
 fclose($js);
 $du += 1;
 echo "你是本站的第".$du."位访客！！！";
 $xie = fopen($jishu,"w");
 fwrite($xie,$du);
 fclose($xie);
}
    kaishi($jishu);

文章网址:http://www.phprm.com/function/php1004478.html

随意转载^^但请附上教程地址。