Course Introduction：PHP Class Initialization Conundrum: Evaluating Expressions in Property DeclarationsThe PHP documentation dictates that class property declarations...
2024-10-30 comment 0 1106
Course Introduction：Calling Non-Static Methods with Double-Colon SyntaxIn PHP, static methods can be invoked using the class name followed by the scope resolution...
2024-11-27 comment 0 1098
Course Introduction：PHP Fatal Error: Using $this When Not in Object ContextProblem:When attempting to access the $this variable within a non-static method of a class...
2024-12-29 comment 0 1132
Course Introduction：There are two main ways to create models in the Yii framework: 1. Use Gii to automatically generate models, and you can generate model classes and CRUD code by enabling Gii tools and accessing its interface to enter table names and class names; 2. Create a model file manually, create a new PHP file in models/ directory and define a class inherited from yii\db\ActiveRecord, and implement tableName(), rules(), attributeLabels() and other methods; in addition, you need to pay attention to the model naming specifications, automatic filling fields, model locations, and the difference between AR and non-AR models, and choose the appropriate method according to actual needs.
2025-07-14 comment 0 352
Course Introduction：There are two common methods for converting date formats in PHP: one is to use strtotime() with the date() function, such as converting "2024-12-31" to "December31,2024"; the other is the more recommended DateTime class, which supports more formats and is more reliable, such as using newDateTime() to parse standard formats or DateTime::createFromFormat() to process non-standard formats. In addition, time zone issues need to be set through date_default_timezone_set(), while localized displays can be used for IntlDateForma
2025-07-06 comment 0 364
Course Elementary 13818
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 82351
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 13173
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 24624
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 27483
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.
2019-09-03 23:33:27 0 1 1341
Why can PHP directly call non-static methods of a class through ::?
2017-06-10 09:47:28 0 7 653
2018-11-25 19:19:16 0 0 1007
How does a PHP static method call a non-static method of the parent class?
2017-06-08 11:01:40 0 5 1235
How to give a random value to a class tag?
2022-01-13 11:12:29 0 9 1383
