Course Introduction：mysqli::query(): mysqli object is already closed / couldn't fetch mysqli errorThe provided PHP code utilizes a class (EventCalendar) that manages...
2024-12-03 comment 0 609
Course Introduction：The seven magic constants of PHP are __LINE__, __FILE__, __DIR__, __FUNCTION__, __CLASS__, __TRAIT__, __METHOD__, and they can dynamically return code location and context information, 1. LINE returns the current line number, for precise debugging; 2. FILE returns the absolute path of the current file, often used to reliably introduce files or define root directory; 3. DIR returns the directory where the current file is located, which is clearer and more efficient than dirname (__FILE__); 4. FUNCTION returns the current function name, suitable for function-level log tracking; 5. CLASS returns the current class name (including namespace), in logs and factories
2025-07-30 comment 0 968
Course Introduction：Laravel collection is an advanced encapsulation of PHP arrays, providing chained calling methods to process data. It is implemented through the Illuminate\Support\Collection class, simplifying filtering, mapping, sorting and other operations. For example, filtering users older than 25 and sorting by name requires only one line of code. Common uses include: 1. Create a collection through collect() function or model query; 2. Use map(), filter(), pluck() and other methods to process data; 3. Support chain calls to improve code readability; 4. Pay attention to collection immutability, return value type and how to use it in Blade templates. Mastering these techniques can significantly improve development efficiency.
2025-07-24 comment 0 742
Course Introduction：EloquentORM is Laravel's built-in object relational mapping system. It operates the database through PHP syntax instead of native SQL, making the code more concise and easy to maintain; 1. Each data table corresponds to a model class, and each record exists as a model instance; 2. Adopt active record mode, and the model instance can be saved or updated by itself; 3. Support batch assignment, and the $fillable attribute needs to be defined in the model to ensure security; 4. Provide strong relationship support, such as one-to-one, one-to-many, many-to-many, etc., and you can access the associated data through method calls; 5. Integrated query constructor, where, orderBy and other methods can be called chained to build queries; 6. Support accessors and modifiers, which can format the number when obtaining or setting attributes.
2025-07-29 comment 0 472
Course Introduction：SqlParameter Parameters.Add vs. AddWithValue: Choosing the Best MethodWhen working with SQL commands, you may encounter the need to add...
2025-01-10 comment 0 736
Course Elementary 13924
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 82479
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 13264
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 24727
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 27563
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.
Receive PHP website source code
2020-07-27 02:07:07 0 0 1133
After cross-class call, method cannot be found
2021-06-12 17:16:18 1 2 1227
2018-09-10 10:02:37 0 0 1392
2023-08-25 00:18:16 0 1 774
Adding cookie header causes request to hang
2023-09-15 21:20:14 0 1 763
