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Course Introduction：Encryption and decryption processing class implemented by PHP, encryption and decryption implemented by PHP. Encryption and decryption processing class implemented by PHP, encryption and decryption implemented by PHP This article describes the encryption and decryption processing class implemented by PHP. Share it with everyone for your reference, the details are as follows: php /*==========

2016-07-12 comment 0  967

Course Introduction：Implementing data packets in PHP can be implemented through array operations and loops. 1) Use loops and array operations to group student data by class; 2) Statistical analysis can be performed when grouping, such as calculating the number of students in each class; 3) Multi-level grouping can be implemented, such as grouping by class and gender, but attention should be paid to performance and memory usage.

2025-05-23 comment 0  430

Course Introduction：Implementing hook functions in PHP can be implemented through observer mode or event-driven programming. The specific steps are as follows: 1. Create a HookManager class to register and trigger hooks. 2. Use the registerHook method to register the hook and trigger the hook by the triggerHook method when needed. Hook functions can improve the scalability and flexibility of the code, but pay attention to performance overhead and debugging complexity.

2025-05-15 comment 0  294

Course Introduction：SOLID principle improves code maintainability and scalability through five core principles in PHP object-oriented design. 1. The single responsibility principle (SRP) requires that each class has only one responsibility, and the separation of concerns is achieved through splitting functions; 2. The opening and closing principle (OCP) advocates extending behavior through interfaces or combinations rather than modifying the original code; 3. The Richter replacement principle (LSP) ensures that subclasses can replace the parent class without destroying logic and avoid behavior inconsistencies; 4. The interface isolation principle (ISP) recommends defining fine-grained interfaces to avoid redundant dependencies; 5. The dependency inversion principle (DIP) decoupling high-level and underlying modules by relying on abstract types (such as interfaces) rather than concrete implementation, and is commonly implemented by dependency injection.

2025-06-19 comment 0  629

Course Introduction：Abstract classes and interfaces have their own uses in PHP. 1. Abstract classes are used to share code, support constructors and control access, and include abstract methods and concrete methods. 2. The interface is used to define behavior contracts. All methods must be implemented and are public by default, and support multiple inheritance. 3. Since PHP8, the interface can contain default methods to implement, but there is still no constructor or state. 4. When using abstract classes, you need to encapsulate implementation details; when using interfaces, you need to define cross-class behavior or build plug-in systems. 5. Can be used in combination: abstract classes implement interfaces or combine multiple interfaces into one abstract class. Select whether the structure plus sharing behavior (abstract class) or only the structure (interface).

2025-06-04 comment 0  1105

Course Elementary  13746

Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.

Course Elementary  82260

Course Introduction："CSS Online Manual" is the official CSS online reference manual. This CSS online development manual contains various CSS properties, definitions, usage methods, example operations, etc. It is an indispensable online query manual for WEB programming learners and developers! CSS: Cascading Style Sheets (English full name: Cascading Style Sheets) is an application used to express HTML (Standard Universal Markup Language).

Course Elementary  13130

Course Introduction：SVG is a markup language for vector graphics in HTML5. It maintains powerful drawing capabilities and at the same time has a very high-end interface to operate graphics by directly operating Dom nodes. This "SVG Tutorial" is intended to allow students to master the SVG language and some of its corresponding APIs, combined with the knowledge of 2D drawing, so that students can render and control complex graphics on the page.

Course Elementary  24578

Course Introduction：In the "AngularJS Chinese Reference Manual", AngularJS extends HTML with new attributes and expressions. AngularJS can build a single page application (SPAs: Single Page Applications). AngularJS is very easy to learn.

Course Elementary  27436

Course Introduction：Go is a new language, a concurrent, garbage-collected, fast-compiled language. It can compile a large Go program in a few seconds on a single computer. Go provides a model for software construction that makes dependency analysis easier and avoids most C-style include files and library headers. Go is a statically typed language, and its type system has no hierarchy. Therefore users do not need to spend time defining relationships between types, which feels more lightweight than typical object-oriented languages. Go is a completely garbage-collected language and provides basic support for concurrent execution and communication. By its design, Go is intended to provide a method for constructing system software on multi-core machines.