PHP basic tutorial: learn counter example code

In this article, we will introduce a basic counter example code in PHP. This counter can be used to record the number of times an event occurs and update the count results in real time. Here is the PHP code to implement this functionality:

<?php
// 定义计数器文件路径
$counterFile = "counter.txt";

// 检查计数器文件是否存在，如果不存在则创建一个新文件并初始化计数为0
if (!file_exists($counterFile)) {
   
    
    
  file_put_contents