Second-hand recycling website developed using PHP supports real-time chat function

The second-hand recycling website developed using PHP supports real-time chat function

Abstract: With the rise of the second-hand market, second-hand recycling websites have become a channel to solve resource waste and environmental pollution. In order to meet the communication needs between users, a second-hand recycling website that supports real-time chat function came into being. This article will introduce how to implement real-time chat function on a second-hand recycling website developed using PHP, and provide relevant code examples.

Keywords: PHP, second-hand recycling website, real-time chat, WebSocket

Introduction:
With the increasing awareness of environmental protection and the emphasis on item utilization, the second-hand recycling market has risen rapidly . As a platform that connects buyers and sellers, second-hand recycling websites provide users with convenience in transactions. However, simply providing product display and contact information is not enough to meet the communication needs between users. Therefore, it is urgent to develop a second-hand recycling website that supports real-time chat function.

1. Project preparation

1. Determine development language and technology
   When building a second-hand recycling website, we chose to use PHP as the back-end development language. As a scripting language widely used in Web development, PHP has the characteristics of fast development and easy use. At the same time, in order to realize the real-time chat function, we will use WebSocket technology.
2. Configure development environment
   In order to build a PHP development environment, we need to install Apache, PHP and MySQL. These software can be downloaded and installed separately. For specific installation steps, please refer to the official documentation.

2. Implementation of real-time chat function

1. Create chat message table
   Create a table named chat_messages in the MySQL database to store chat messages. The table should contain the following fields:
2. id: message ID, auto-incremented primary key
3. sender_id: sender ID, associated with the user table
4. receiver_id: receiver ID, associated with User table association
5. message: Message content
6. created_at: Creation time
7. WebSocket server side
   Use the PHP WebSocket library to create the WebSocket server side. The following is a sample code to create a WebSocket server:

require_once 'WebSocket.php'; class ChatServer extends WebSocket { protected function process($user, $message) { // 处理客户端发送的消息 // 将消息存储到chat_messages表中 // 并向接收者发送通知 } } $server = new ChatServer("localhost", 8000); try { $server->run(); } catch (Exception $e) { $server->stdout($e->getMessage()); }

In theprocessmethod, we can process the message sent by the client and store the message inchat_messagestable, and then send a notification to the recipient.

3. WebSocket Client
   Add WebSocket client code on the front end of the website to communicate with the server. The following is a sample code:

     
  
  发送   

In the above sample code, connect to the server through WebSocket and listen to the messages sent by the server. When sending a message, send the message to the server through thesocket.sendmethod.

3. Summary

Through the above steps, we successfully implemented the real-time chat function of the second-hand recycling website. Users can chat in real time on the product details page to strengthen communication and trust between the two parties. Of course, the above sample code is just a simple example, and there are still many details and security issues that need further optimization.

In actual projects, we can also optimize the design of the chat interface and add functions such as message sending status to improve user experience. In addition to real-time chat functions, second-hand recycling websites can also add other functions, such as user authentication, product release, etc., to provide more comprehensive services.

Reference materials:

1. PHP official website: https://www.php.net/
2. WebSocket library: https://github.com/Textalk /websocket-php

Code example:

• WebSocket server side: https://github.com/MyNameIsLin/WebSocket-ChatServer-PHP
• WebSocket client: https://gist.github.com/MyNameIsLin/a95589d1483d0d9f7483195e467f9bca

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