php网站浏览计数器
<?php
$count_num=0;
//如果存放计数器文件已经存在，读取其中的内容
if(file_exists("counter.txt")){
$fp =fopen("counter.txt","r");
$count_num = fgets($fp,9);
fputs($fp,$count_num+1);
echo $count_num;
fclose($fp);
}
$fp=fopen("counter.txt","w");
//写入最新的值
fputs($fp,$count_num+1);
//关闭文件
fclose($fp);
echo "<h2 align=center>您是第<i>$txt</I>位访客！</h2>"
?>