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Course Introduction：Understanding the Compatibility Requirement for Method Declarations in PHPIn PHP, when extending a class and defining a method with the same name...

2024-12-15 comment 0  549

Course Introduction：In PHP, the final keyword is used to prevent classes from being inherited and methods being overwritten. 1) When marking the class as final, the class cannot be inherited. 2) When marking the method as final, the method cannot be rewritten by the subclass. Using final keywords ensures the stability and security of your code.

2025-04-08 comment 0  1157

Course Introduction：This tutorial aims to resolve the "Undefined index: link" error encountered when trying to get and display the classification link in the PrestaShop 1.7 custom module. We will explain in detail how to use PrestaShop's Link class to pass link objects to the Smarty template in the backend PHP code, and call the getCategoryLink method correctly in the frontend template to dynamically generate a classification URL to ensure the correctness and accessibility of the link.

2025-08-20 comment 0  317

Course Introduction：This tutorial details how to correctly obtain and display the classification link in the PrestaShop 1.7 custom module, and resolves the common error of "Undefined index: link" after using the Category::getNestedCategories method. The article will guide you how to use PrestaShop's Link class to assign link objects to Smarty templates in PHP code, and dynamically generate classified URLs through the getCategoryLink method in the template to ensure the accuracy and maintainability of the link.

2025-08-21 comment 0  640

Course Introduction：function is an independent function, suitable for general functions; method is part of the class, suitable for encapsulating object behavior. Function can be called directly, with global scope, cannot access class attributes, does not support object-oriented features, and is suitable for small scripts; method needs to be called through objects or classes, belongs to the class, can access private attributes, supports inheritance polymorphism, and is suitable for large project structures. Function or method should be used according to whether the status and encapsulation are required.

2025-07-23 comment 0  413

Course Advanced  33463

Course Introduction：Infinite classification is very common in daily applications, and website classification relies on it. This course will explain in detail the usage scenarios and common implementation methods of infinite classification, to help future learning and use.

Course Elementary  13888

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  82443

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  24695

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.