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Article Introduction：This article discusses in depth how to use the pyads library to efficiently process PLC real-time data notifications. For high concurrency and large data volume scenarios, we propose and elaborate on class encapsulation-based solutions to avoid global variables and achieve clearer state management and data accumulation. At the same time, the article also introduces key techniques for optimizing data parsing performance, including batch processing using raw byte data and NumPy, aiming to help developers build a robust and high-performance PLC data acquisition system.

2025-08-11 comment 0  250

Article Introduction：This tutorial explores how to efficiently and Pythonically process real-time, large-scale notification data from PLCs in PyADS applications, avoiding the use of global variables. By introducing a class-based callback function management model, the article elaborates on how to safely integrate callback data into application state and provides strategies to optimize data conversion performance, especially for high-throughput data acquisition scenarios.

2025-08-13 comment 0  980

Article Introduction：This article aims to explore how to efficiently process ADS notification callback data from PLC in Pyads applications, especially when processing large and high-frequency data, avoid using global variables, and use Pythonic class encapsulation method to manage state. At the same time, the article will also explain in-depth how to optimize the conversion of byte data to Python type to improve the performance of large-scale data processing.

2025-08-11 comment 0  444

Article Introduction：When the business logic is complex, the service class should be used to extract the logic beyond HTTP processing in the controller (such as user registration, pricing calculation); 2. When multiple controllers, tasks or commands need to reuse the same logic (such as data synchronization, report generation), the service class can avoid code duplication; 3. When better testability is required, the service class can conduct unit testing independently without relying on HTTP requests; 4. When multiple operations or services need to be coordinated (such as inventory, payment, notification, etc. in order processing), the service class can effectively organize the process. Service classes are usually placed in app/Services or subdirectories grouped by functions, and should be used through dependency injection to avoid excessive bloat and ensure single responsibilities. Therefore, as long as the controller is performing actual business work instead

2025-08-06 comment 0  406

Article Introduction：Alipay PHP...

2025-04-01 comment 0  1566

Article Introduction：Carbon: PHP date and time processing tool Carbon is a lightweight PHP library for simplifying the processing of dates and times. It is based on and extends the core DateTime class and adds many convenient methods to make date-time operation easier. This article will introduce the basic usage of Carbon and demonstrate how to use it in a real project. Core points: Carbon is a library designed for PHP date and time operations, extends the core DateTime class and adds user-friendly methods to provide a more intuitive experience. The library can be installed using Composer and can be instantiated from strings, timestamps, or other DateTime or Carbon instances

2025-02-16 comment 0  536

Article Introduction：There are two main ways to convert timestamps to readable formats in PHP. 1. Use the date() function, such as date("Y-m-dH:i:s",timestamp); 2. Use the DateTime class to implement more complex date processing, such as newDateTime("@timestamp") and combine the format() method; in addition, when processing time zones, you can adjust them through setTimeZone() to ensure accuracy for global users.

2025-07-21 comment 0  583

Article Introduction：Laravel 11.35 introduces the Uri class based on the PHP League URI library. Uri simplifies the process of manipulating and processing URIs in Laravel applications and provides some convenient features about named routing. Basic Operation The core function of the Uri class is to create and manipulate URI strings, including queries, fragments, and paths: use Illuminate\Support\Uri; $uri = Uri::of('https://laravel-news.com') ->withPath('links') ->wit

2025-03-05 comment 0  840

Article Introduction：How to use MVC mode in PHP? 1. Set the basic file structure and create three folders: Model, View and Controller; 2. Write model processing logic, such as UserModel class operating database; 3. Create controller to receive requests and coordinate model and view, such as UserController obtaining data; 4. Build view display content, such as user_profile.php mixing HTML and PHP output dynamic data; 5. Unified request processing through the front-end controller index.php, loading the model and controller and executing corresponding methods to achieve application scalability.

2025-06-21 comment 0  797

Article Introduction：PHP runs on the server side. When the user requests the page, the server executes the code through the PHP engine and returns HTML to ensure that the PHP code is not seen by the front end. 1. Request processing: Use $_GET, $_POST, $_SESSION, $_SERVER to obtain data, and always verify and filter inputs to ensure security. 2. Separation of logic and display: Separate data processing from HTML output, use PHP files to process logic, and template files are responsible for displaying, improving maintainability. 3. Automatic loading and file structure: Configure PSR-4 automatic loading through Composer, such as "App\":"src/", to automatically introduce class files. Suggested projects

2025-07-27 comment 0  977

Article Introduction：Key Points GD and ImageMagick are both popular PHP image processing libraries. GD is more widely used and ImageMagick is more powerful. In terms of performance, there is no absolute advantage or disadvantage between the two, and the speed depends on the specific application scenario. The encoding styles are significant. GD adopts procedural programming, and ImageMagick supports object-oriented programming through the Imagick class. In addition to these two libraries, there are other options, such as cloud image processing platforms or components that have been integrated into the application. introduction In PHP applications, if you need to create thumbnails, apply image filters, or perform other image conversions, you need to use the image processing library. Usually, you'll choose GD or ImageMagick. But which library

2025-02-22 comment 0  1336

Article Introduction：In PHP, there are two main methods: one is to use the DateTime class, and the other is to use the strtotime() function. 1. Use the DateTime class to be used for PHP5.3 and above, especially the DateTime::createFromFormat() method to parse strings in the specified format, such as $date=DateTime::createFromFormat('Y-m-d','2024-04-05'); 2. Use the strtotime() function to be suitable for processing natural language formats, such as strtotime("nextFriday"), but it is based on

2025-07-07 comment 0  647

Article Introduction：The most commonly used design patterns in C include singleton mode, factory mode, observer mode, and policy mode. Singleton mode ensures that a class has only one instance and provides global access points, which is often used in scenarios such as configuration managers; factory mode encapsulates the object creation process so that the caller does not need to know the specific class name, which is suitable for situations where the object creation logic is complex or changeable; observer mode implements a one-to-many dependency notification mechanism, which is widely used in UI updates or event listening systems; policy mode allows runtime switching algorithms or behaviors, and is suitable for scenarios such as payment systems that require dynamic changes in processing methods. These modes help developers build clearer and easier to maintain code structures by decoupling, hiding implementation details, and improving scalability.

2025-07-25 comment 0  329

Article Introduction：It is recommended to use the DateTime class for PHP processing date and time. 1. Use the DateTime class to replace old functions, with clear structure and support time zone settings; 2. Use DateTime to manage time and specify the target time zone before output; 3. Use DateInterval to calculate the time difference and obtain complete information such as year, month, and day; 4. Pay attention to avoid the influence of mixed use of date() functions, hard-coded time strings and daylight saving time.

2025-07-09 comment 0  326

Article Introduction：There are three main ways to create callback functions in PHP, namely, using ordinary functions, anonymous functions and class methods. A callback function is a function passed as a parameter to another function, and is often used in scenarios such as array processing, event-driven programming, and asynchronous processing. 1. When using ordinary functions, you need to pass the function name as a string, such as 'multiply_by_two'; 2. Using anonymous functions (Closure) can make the code more concise and suitable for one-time use; 3. When using class methods, the static method is passed through ['ClassName','method'], and the instance method is passed through objects. It is recommended to choose the appropriate method according to the logical complexity and pay attention to access permissions and code maintainability.

2025-07-07 comment 0  361

Article Introduction：There are three ways to get yesterday's date in PHP: use the strtotime() function, combine the date() function to output detailed time, or use the DateTime class for flexible processing. The first method directly obtains yesterday's date through echodate('Y-m-d',strtotime('yesterday')); the second method can output the full time containing time, minutes and seconds, such as echodate('Y-m-dH:i:s',strtotime('yesterday')); the third method uses the object-oriented DateTime class to facilitate the execution of complex date operations, such as adding and subtracting days or setting time zones, with the code as $date=n

2025-07-04 comment 0  172

Article Introduction：Implementing custom session processing in PHP can be done by implementing the SessionHandlerInterface interface. The specific steps include: 1) Creating a class that implements SessionHandlerInterface, such as CustomSessionHandler; 2) Rewriting methods in the interface (such as open, close, read, write, destroy, gc) to define the life cycle and storage method of session data; 3) Register a custom session processor in a PHP script and start the session. This allows data to be stored in media such as MySQL and Redis to improve performance, security and scalability.

2025-04-24 comment 0  733

Article Introduction：This article explores in depth how to correctly pass an object method or closure as a callback function in PHP. Unlike languages such as JavaScript, PHP has its own unique processing mechanism for callable types. We will distinguish the difference between assigning closures to object properties and defining class methods, and use instance code to show how to pass static methods and instance methods as callback functions to avoid common Call to undefined method errors and ensure the robustness and maintainability of the code.

2025-08-15 comment 0  290

Article Introduction：Getting the current year can be achieved in PHP through two main methods. 1. Use the date('Y') function to directly output four-digit years, which is suitable for simple scenarios; 2. Use the DateTime class for object-oriented processing, which is suitable for complex projects. Note: To avoid time zone problems, it is recommended to explicitly set the time zone, such as Asia/Shanghai, through date_default_timezone_set() or DateTimeZone, to ensure accurate results.

2025-07-06 comment 0  484

Article Introduction：PHP provides a variety of functions and classes for processing dates and times. This article will explore different ways to get the current date and time in PHP and discuss some additional considerations when dealing with time in PHP. Key Points PHP provides a variety of methods to get the current date and time, including the date() function, the time() and gmdate() functions, and the DateTime classes. Each method allows for different formatting options and considerations, such as time zones. When using the date() function and the DateTime class, the server's local time zone is used by default. To use a different time zone, you can use date_default_timez

2025-02-08 comment 0  1013