Course Introduction：Constant Arrays in PHPIn PHP, defining a constant array using the define() function was once not possible. However, significant changes were...
2024-12-01 comment 0 924
Course Introduction：I encountered a challenge when developing a PHP project that requires interaction with CouchDB: how to manage database operations efficiently and concisely. Initially, I tried to use CouchDB's API directly, but found that the operation was cumbersome and error-prone. After some exploration, I found the yay-couch/couch library, which greatly simplified my workflow.
2025-04-18 comment 0 356
Course Introduction：Use of Undefined Constant: Understanding the PHP ErrorThe error "Use of undefined constant" in PHP indicates that you are attempting to reference...
2024-12-26 comment 0 962
Course Introduction：PHP Error: Unraveling the Mystery of "Constant Expression Contains Invalid Operations"Facing a frustrating "Fatal error: Constant expression...
2024-12-03 comment 0 604
Course Introduction：PHP Error: Constant Expression Contains Invalid OperationsA common issue encountered in PHP development is the "Fatal error: Constant expression...
2024-12-01 comment 0 1144
Course Elementary 13772
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 82280
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 13144
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 24590
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 27446
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.
Invalid operation causes constant expression to be invalid
2023-08-22 20:09:10 0 2 669
$aa[bar] will report an error, right? PHP will consider bar as a constant.
$aa[bar] will report an error, right? PHP will consider bar as a constant.
2020-07-20 14:31:18 0 2 1318
2020-06-07 19:43:32 0 0 983
2019-07-22 15:08:13 0 1 1407
How is this voting option adding operation named .php?
How is this voting option adding operation named .php?
2019-05-02 18:32:09 0 1 1497
