<?php
// PHP访客计数器
function num()
{
if(!file_exists("n.txt"))
{
$fp=fopen("n.txt","w");
fwrite($fp,"1");
fclose($fp);
$n=1;
}
else
{
$fp=fopen("n.txt","r");
$n=fgets($fp);
fclose($fp);
$n++;
$fp=fopen("n.txt","w");
fwrite($fp,$n);
fclose($fp);
}
return $n;
}
?>When using this program, you need to upload it to the corresponding directory, and then add the following code to the page that displays the number of visitors:
require_once"count.php";
$guestsnum=num();
echo"You are the ".$guestsnum. "Visitor";
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
