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Course Introduction：In PHP, the main difference between == and == is the strictness of type checking. ==Type conversion will be performed before comparison, for example, 5=="5" returns true, and ===Request that the value and type are the same before true will be returned, for example, 5==="5" returns false. In usage scenarios, === is more secure and should be used first, and == is only used when type conversion is required.

2025-06-19 comment 0  547

Course Introduction：Using === instead of == is the key to avoiding the PHP type conversion trap, because === compares values and types at the same time, and == performs type conversion to lead to unexpected results. 1.==The conversion will be automatically performed when the types are different. For example, 'hello' is converted to 0, so 0=='hello' is true; 2.====The value and type are required to be the same, avoiding such problems; 3. When dealing with strpos() return value or distinguishing between false, 0, '', null, ===; 4. Although == can be used for user input comparison and other scenarios, explicit type conversion should be given priority and ===; 5. The best practice is to use === by default, avoid implicit conversion rules that rely on == to ensure that the code behavior is consistent and reliable.

2025-07-31 comment 0  1000

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  432

Course Introduction：In PHP, the main difference between == and == is the strictness of type checking. The == operator performs type conversion when comparing, while === strictly checks the values ??and types without conversion. For example: "5"==5 returns true but "5"==5 returns false; 0==false is true but 0===false is false; null===0 is always false. You should use == when the type is independent or requires flexible comparison, such as user input processing; if the type must be consistent, such as the detection function returns false, validation null or boolean flag. It is recommended to use === first to avoid logic caused by type conversion

2025-07-09 comment 0  244

Course Introduction：When developing a Geographic Information System (GIS), I encountered a difficult problem: how to efficiently handle various geographic data formats such as WKT, WKB, GeoJSON, etc. in PHP. I've tried multiple methods, but none of them can effectively solve the conversion and operational issues between these formats. Finally, I found the GeoPHP library, which easily integrates through Composer, and it completely solved my troubles.

2025-04-17 comment 0  1045

Course Elementary  13822

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  82358

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  13175

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  24625

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  27484

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.