PHP implements website traffic counter
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($cf,'0'); //初始化计数器
fclose($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
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