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Course Introduction：This article details how to write testable PHP code. It emphasizes modularity, separation of concerns, and dependency injection to create loosely coupled, easily testable units. Best practices for unit testing, including the AAA pattern and mocking

2025-03-10 comment 0  657

Course Introduction：Virtual File System (VFS) simulates file system operations in unit tests, avoiding the hassle of cleaning temporary files. This article describes how to use the vfsStream library to simplify the testing of file system operations in PHP unit tests. First, we have a simple FileCreator class for creating files:

2025-02-14 comment 0  510

Course Introduction：To use PHP to implement AI image style conversion, you need to follow the following steps: 1. Select a suitable AI model, such as CycleGAN or StyleTransfer, and you can use the trained model or train it yourself; 2. Deploy the model to the server, such as TensorFlowServing or TorchServe; 3. PHP calls the AI model and execute it through shell_exec or Symfony/Process components; 4. Use GD library or Imagick extension to perform image preprocessing; 5. Color adjustment, sharpening and other post-processing of the conversion results; 6. Display the results through HTML, CSS, and JavaScript. PHP acts as a bridge and is responsible for connecting

2025-07-25 comment 0  460

Course Introduction：Core points Migrating the underlying Laravel application of Boxzilla applications from PHP to Go ends up with a more efficient program with better performance, easier deployment and higher test coverage, despite initial concerns about potential business risks. Go is a compiled language with a standard library that is better than PHP, and can generate faster, smaller applications with fewer lines of code even if external dependencies are considered. The conversion from PHP to Go needs to adapt to new syntax and features, but the end result is considered worthwhile. Despite PHP's larger community and rich resources, Go's growing popularity, ease of use, and excellent performance features make it a strong contender for developers to consider conversions. The author predicts that the future will be

2025-02-10 comment 0  497

Course Introduction：The problem of inaccurate floating point numbers is common in PHP, especially in financial calculations or precise comparisons. The root cause is that decimal decimals cannot be stored accurately in binary floating point representation (IEEE754 standard), resulting in results such as 0.1 0.2≠0.3; 1. When comparing floating point numbers equality, you should use tolerance values (epsilon) instead of directly using ==; 2. Financial calculations should avoid using floating point numbers, and instead use integers (such as in units of division) or BCMath extension; 3. BCMath performs arbitrary precision calculations through strings, which are suitable for high-precision scenarios, but have low performance; 4. It should be noted that PHP type conversion may implicitly convert strings or integers to floating point numbers to introduce errors; in short, inaccurate floating point numbers is a general calculation problem, but in

2025-07-26 comment 0  613

Course Elementary  13894

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  82444

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  13237

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  24696

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  27542

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.