Home Backend Development PHP Tutorial Real-time inventory management and early warning functions using PHP and MQTT

Real-time inventory management and early warning functions using PHP and MQTT

Jul 11, 2023 am 11:46 AM
Send reminder notification

Use PHP and MQTT to realize real-time inventory management and early warning functions

1. Background introduction
In modern business operations, inventory management is a very important part. Accurate inventory information can help companies understand product quantities and changes in real time, allowing them to make more accurate purchasing and sales decisions. At the same time, the inventory warning function can predict inventory shortages in advance and help companies avoid negative consequences such as stockouts.

2. Technology selection
This article uses PHP as the server-side programming language, and combines it with the MQTT protocol to achieve real-time inventory management and early warning functions. As a commonly used web development language, PHP is easy to learn and use; the MQTT protocol is a lightweight messaging protocol suitable for Internet of Things and mobile application scenarios.

3. Inventory management function implementation
1. Database design
First, create a database named inventory and create a data table named products to store product inventory information. The data table includes the following fields:

  • id: product ID
  • name: product name
  • quantity: product quantity

2. Page design and development
Create a file named index.php to display inventory information. In this file, we can list the names and quantities of all products and provide a form for the user to enter the product names and quantities.

3. Database connection and data reading
In the PHP file, we need to realize the connection with the database and read the product inventory information from the database. The following is a code example for connecting to the database and reading data:

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "inventory";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);
// 检查连接是否成功
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 从数据库中读取产品的库存信息
$sql = "SELECT id, name, quantity FROM products";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    echo "<table>";
    echo "<tr><th>产品ID</th><th>产品名称</th><th>产品数量</th></tr>";
  
    while($row = $result->fetch_assoc()) {
        echo "<tr><td>".$row["id"]."</td><td>".$row["name"]."</td><td>".$row["quantity"]."</td></tr>";
    }
  
    echo "</table>";
} else {
    echo "暂无产品信息";
}

$conn->close();
?>
Copy after login

IV. Implementation of inventory early warning function
1. Set the inventory early warning threshold
In order to implement the inventory early warning function, we need to set an inventory early warning threshold . When the inventory of a product falls below this threshold, the system will issue an early warning message.

2. Send MQTT message
In the PHP file, we can use the MQTT protocol to send warning messages. The following is a code example for sending MQTT messages:

<?php
require("phpMQTT.php");

$server = 'localhost';     //MQTT服务器地址
$port = 1883;                     //MQTT服务器端口号
$username = 'username';   //MQTT用户名
$password = 'password';   //MQTT密码

$mqtt = new phpMQTT($server, $port, "PHP MQTT Client");
if (!$mqtt->connect(true, NULL, $username, $password)) {
    exit(1);
}

$topic = 'inventory/alert';      //MQTT主题
$message = '产品A库存不足,请及时补货!';  //预警消息

// 发布MQTT消息
$mqtt->publish($topic, $message, 0, false);

$mqtt->close();
?>
Copy after login

3. Subscribe to MQTT messages
In order to receive MQTT alert messages, we need to subscribe to the corresponding MQTT topic in another PHP file and process the received messages . The following is a code example for subscribing to MQTT messages:

<?php
require("phpMQTT.php");

$server = 'localhost';     //MQTT服务器地址
$port = 1883;                     //MQTT服务器端口号
$username = 'username';   //MQTT用户名
$password = 'password';   //MQTT密码

$mqtt = new phpMQTT($server, $port, "PHP MQTT Client");
if (!$mqtt->connect(true, NULL, $username, $password)) {
    exit(1);
}

$topic = 'inventory/alert';      //MQTT主题

// 定义接收消息的回调函数
function messageReceived($topic, $message) {
    echo "接收到预警消息:[{$topic}] {$message}<br/>";
}

// 订阅MQTT主题并设置接收消息的回调函数
$mqtt->subscribe($topic, function($topic, $message){
    messageReceived($topic, $message);
}, 0);

while ($mqtt->proc()) { }

$mqtt->close();
?>
Copy after login

5. Summary
By using PHP and MQTT protocols, we have achieved real-time inventory management and early warning functions. The MQTT protocol can be used to publish and subscribe to real-time messages, and timely send out warning messages when the inventory falls below the warning threshold. This can improve the efficiency of inventory management of enterprises and avoid problems such as stockouts. At the same time, through the design and operation of the database, accurate recording and query of inventory information can be achieved. In actual applications, the code can be modified and optimized according to specific needs to meet more specific business scenarios.

The above is the detailed content of Real-time inventory management and early warning functions using PHP and MQTT. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
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

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

Explain the concept of late static binding in PHP. Explain the concept of late static binding in PHP. Mar 21, 2025 pm 01:33 PM

Article discusses late static binding (LSB) in PHP, introduced in PHP 5.3, allowing runtime resolution of static method calls for more flexible inheritance.Main issue: LSB vs. traditional polymorphism; LSB's practical applications and potential perfo

How does session hijacking work and how can you mitigate it in PHP? How does session hijacking work and how can you mitigate it in PHP? Apr 06, 2025 am 12:02 AM

Session hijacking can be achieved through the following steps: 1. Obtain the session ID, 2. Use the session ID, 3. Keep the session active. The methods to prevent session hijacking in PHP include: 1. Use the session_regenerate_id() function to regenerate the session ID, 2. Store session data through the database, 3. Ensure that all session data is transmitted through HTTPS.

Describe the SOLID principles and how they apply to PHP development. Describe the SOLID principles and how they apply to PHP development. Apr 03, 2025 am 12:04 AM

The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.

How to automatically set permissions of unixsocket after system restart? How to automatically set permissions of unixsocket after system restart? Mar 31, 2025 pm 11:54 PM

How to automatically set the permissions of unixsocket after the system restarts. Every time the system restarts, we need to execute the following command to modify the permissions of unixsocket: sudo...

How to debug CLI mode in PHPStorm? How to debug CLI mode in PHPStorm? Apr 01, 2025 pm 02:57 PM

How to debug CLI mode in PHPStorm? When developing with PHPStorm, sometimes we need to debug PHP in command line interface (CLI) mode...

Explain late static binding in PHP (static::). Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

See all articles