Course Introduction：This document aims to solve the problem of how to obtain parameters from URLs and pass them to model classes in the CodeIgniter framework to implement data filtering. We will explain in detail how to obtain URL parameters in the controller and pass them safely to the model, ultimately implementing dynamic filtering of data.
2025-08-18 comment 0 688
Course Introduction：This document aims to solve the problem of how to get parameters from URLs and pass them to model classes in the CodeIgniter framework to implement data filtering. We will explain in detail how to use the $this->input->get() method to obtain URL parameters, and correctly use these parameters in the controller and model, ultimately implement dynamic filtering of data.
2025-08-21 comment 0 349
Course Introduction：This article deeply explores the problem of exporting empty files that may be encountered in Laravel applications when using the Maatwebsite/Laravel-Excel library for conditional filtering data export. The core reasons are usually the inappropriate request method (GET vs POST) and the misuse of the data parameter delivery mechanism. The article will provide a complete set of solutions, including code optimization for routing, views, controllers and export classes, to ensure that data filtering conditions are correctly passed and target data is exported successfully.
2025-08-13 comment 0 684
Course Introduction：This document aims to solve the problem of how to get parameters from URLs and pass them into model classes for data filtering in the CodeIgniter framework. We will explain in detail how to use the $this->input->get() method to obtain URL parameters and apply them to the controller and model, and ultimately implement dynamic filtering of data. At the same time, this article will also provide some best practices and precautions to help developers avoid common mistakes.
2025-08-18 comment 0 489
Course Introduction：In relational databases, it is not supported to directly define "conditional foreign keys" to implement foreign key constraints based on specific values. However, at the application layer, we can flexibly implement conditional loading and filtering of associated data through query builders (such as LaravelEloquent), thereby achieving a "conditional connection" effect. This article will introduce in detail how to use the with method and its closure parameters in LaravelEloquent, conditional filtering of the association model, and how to use whereHas to filter the main model.
2025-07-25 comment 0 675
Course Elementary 13889
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.
Course Elementary 27540
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.
Open source PHP novice entry-level framework WillPHP (similar to ThinkPHP)
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Problem filtering data from a dataset based on user input
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