Home > Article > Backend Development > PHP implements website traffic counter

PHP implements website traffic counter

小云云Original: 2017-12-08 13:29:443062browse

Every website will have page views. In this article, we will share with you a simple website visit counter implementation, as follows

First explain the idea:

1. The user sends an access request to the server
2. The server reads the access count file, +1, and returns to the client
3. The server saves the new number of views
4. When a new user visits, repeat 123, that is Can

Solution (main algorithm):

1. Data file: counter.dat
2. Read the data file
Open the file;
If it does not exist, create it, and use 0 as the initial data;
Otherwise, read the data;
Close the file.
3. Write the accumulated data to the file counter.dat
Accumulate data;
Open the file;
Write data;
Close the file;
4. Output information to the web page ;
Create the Count_Visitor folder.

In the Count_Visitor folder, create the Count_Visitor.php file and type the following code:

<html>
<head>
 <meta charset="UTF-8">
 <title>浏览计数器-ljccccccccccc@163.com</title>
</head>
<body>
 <?php
  //数字输出网页计数器
  $max_len = 9;
  $CounterFile = "counter.dat";
  if(!file_exists($CounterFile)){  //如果计数器文件不存在
   $counter = 0;     
   $cf = fopen($CounterFile,"w"); //打开文件
   fputs($cf,&#39;0&#39;);     //初始化计数器
   fclose($cf);     //关闭文件
  }
  else{          //取回当前计数器的值
   $cf = fopen($CounterFile,"r");
   $counter = trim(fgets($cf,$max_len));
   fclose($cf);
  }
  $counter++;         //计数器加一
  $cf = fopen($CounterFile,"w");    //写入新的数据
  fputs($cf,$counter);
  fclose($cf);
 ?>
 <p id="dd" align="center">
  <span>欢迎您!</span>
  <span>您是本站的第
   <?php
    echo $counter;       //输出计数器
   ?>
  位访客！</span>
 </p>

</body>
</html>

If necessary, you can type the css file to decorate yourself.

Variables included in the code and their meaning

$max_len: Custom variable. The maximum number of digits in the counter;

$CounterFile: Custom variable. The file where the counter is stored (path and file name);

$counter: custom variable. Counter value;

$cf: custom variable. Open the handle of the counting file;

Functions and meanings contained in the code

file_exists($CounterFile): Determine whether the file exists;

fopen($CounterFile,”w”): Open the file for writing. (The function has its own attributes, if it does not exist, it will be created)

fopen($CounterFile,'r'): Open the file in read-only mode.

fgets($cf,$max_len): Read characters of specified length from the file

fputs($cf,”0”): Write the character “0” into $cf

fclose($cf): Close the file opened by $cf

trim(fgets($cf,$max_len)): Remove the spaces on both sides of the extracted string

Related recommendations:

How to implement the basics of counters in JavaScript

php counter program code example

PHP visitor counter

The above is the detailed content of PHP implements website traffic counter. For more information, please follow other related articles on the PHP Chinese website!

Statement：

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Previous article：How to implement string flip function in PHPNext article：How to implement string flip function in PHP

See more

PHP implements website traffic counter

Related articles