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Editor to share with you how to achieve php traffic, I believe that most people do not know much about it, so share this article for your reference, I hope you will learn a lot after reading this article, let's go to know it!

Php to achieve access to the method: 1, read the data file; 2, the accumulated data into the file "counter.dat"; 3, output information to the web page.

This article operating environment: Windows7 system, PHP7.4 version, Dell G3 computer.

The realization of website visit counter by PHP

A simple website traffic counter is implemented as follows

First of all, explain the train of thought:

1. The user sends an access request to the server

two。 The server reads the access times file, + 1, and returns to the client

3. The server saves new browsing times

4. New user access, repeat 123.

Solution (main algorithm):

1. Data file: counter.dat

two。 Read the data file

Open a 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

Cumulative data

Open a file

Write data

Close the file

4. Output information to a web page

Create a Count_Visitor folder.

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

Browse counter-ljccccccccccc@163.com Welcome! You are the first visitor to this site!

If necessary, you can type your own css file decoration.

Variables contained in the code and their meanings

$max_len: custom variable. The maximum number of digits of the counter

$CounterFile: custom variable. The file (path and file name) stored by the counter

$counter: custom variable. Value of counter

$cf: custom variable. Open the handle to the count file

Functions and meanings contained in the code

File_exists ($CounterFile): determines whether the file exists

Fopen ($CounterFile, "w"): opens the file as a write. (the function has its own properties, which will be created if it does not exist)

Fopen ($CounterFile,'r'): open the file read-only.

Fgets ($cf,$max_len): reads characters of a specified length from a file

Fputs ($cf, "0"): writes the character "0" to $cf

Fclose ($cf): closes files opened by $cf

Trim (fgets ($cf,$max_len)): removes spaces on both sides of a string

The above is all the content of the article "how php achieves traffic". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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