Do not use this tag. For questions related to an aspect of the world wide web, use a more specific tag for it, such as [uri], [html], [http] or [w3c].

PHP is a widely used, high-level, dynamic, object-oriented and interpreted scripting language primarily designed for server-side web development.

JavaScript (not to be confused with Java) is a high-level, dynamic, multi-paradigm, weakly-typed language used for both client-side and server-side scripting. Its primary use is in rendering and allowing manipulation of web pages. Use this tag for questions regarding ECMAScript and its various dialects/implementations (excluding ActionScript and Google-Apps-Script).

jQuery is a popular cross-browser JavaScript library that facilitates Document Object Model (DOM) traversal, event handling, animations, and AJAX interactions by minimizing the discrepancies across browsers. A question tagged jquery should be related to jquery, so jquery should be used by the code in question and at least a jquery usage-related elements need to be in the question.

CodeIgniter is an open-source PHP web development framework created by EllisLab Inc and it has been adopted by British Columbia Institute of Technology. The framework implements a modified version of the Model-View-Controller design pattern. Use this tag for questions about CodeIgniter classes, methods, functions, syntax and use PHP web development framework created by EllisLab Inc and it has been adopted by British Columbia Institute of Technology.

ASP.NET is a Microsoft web application development framework that allows programmers to build dynamic web sites, web applications and web services. It is useful to use this tag in conjunction with the project type tag e.g. [asp.net-mvc], [asp.net-webforms], or [asp.net-web-api]. Do NOT use this tag for questions about ASP.NET Core - use [asp.net-core] instead.

Java (not to be confused with JavaScript or JScript or JS) is a general-purpose object-oriented programming language designed to be used in conjunction with the Java Virtual Machine (JVM). "Java platform" is the name for a computing system that has installed tools for developing and running Java programs. Use this tag for questions referring to the Java programming language or Java platform tools.

HTML (Hyper Text Markup Language) is the standard markup language used for structuring web pages and formatting content. HTML describes the structure of a website semantically along with cues for presentation, making it a markup language, rather than a programming language. HTML works in conjunction primarily with CSS and JavaScript, adding presentation and behaviour to the pages. The most recent revision to the HTML specification is HTML5.2.

CSS (Cascading Style Sheets) is a representation style sheet language used for describing the look and formatting of HTML (Hyper Text Markup Language), XML (Extensible Markup Language) documents and SVG elements including (but not limited to) colors, layout, fonts, and animations.

Use this tag (along with an appropriate programming-language tag) for programming questions relating to the Apache HTTP Server. Do not use this tag for questions about other Apache Foundation products. Note that server configuration questions are usually a better fit on https://serverfault.com

C is a general-purpose computer programming language used for operating systems, libraries, games and other high performance work. This tag should be used with general questions concerning the C language, as defined in the ISO 9899:2011 standard. If applicable, include a version-specific tag such as c99 or c90 for questions relating to older language standards. C is distinct from C++ and it should not be combined with the C++ tag absent a rational reason.

C# (pronounced "see sharp") is a high level, object-oriented programming language that is designed for building a variety of applications that run on the .NET Framework (or .NET Core). C# is simple, powerful, type-safe, and object-oriented.

A data structure is a way of organizing data in a fashion that allows particular properties of that data to be queried and/or updated efficiently.

AJAX (Asynchronous JavaScript and XML) is a technique for creating seamless interactive websites via asynchronous data exchange between client and server. AJAX facilitates communication with the server or partial page updates without a traditional page refresh.

Structured Query Language (SQL) is a language for querying databases. Questions should include code examples, table structure, sample data, and a tag for the DBMS implementation (e.g. MySQL, PostgreSQL, Oracle, MS SQL Server, IBM DB2, etc.) being used. If your question relates solely to a specific DBMS (uses specific extensions/features), use that DBMS's tag instead. Answers to questions tagged with SQL should use ISO/IEC standard SQL.

MongoDB is a scalable, high-performance, open source, document-oriented NoSQL database. It supports a large number of languages and application development platforms. Questions about server administration can be asked on http://dba.stackexchange.com.

This tag is for programming-specific questions related to the content management system WordPress. Questions about theme development, WordPress administration, management best practices, and server configuration are off-topic here and best asked on Stack Exchange WordPress Development.

Android is Google's mobile operating system, used for programming or developing digital devices (Smartphones, Tablets, Automobiles, TVs, Wear, Glass, IoT). For topics related to Android, use Android-specific tags such as android-intent, not intent, android-activity, not activity, android-adapter, not adapter etc. For questions other than development or programming, but related to Android framework, use the link: https://android.stackexchange.com.

C++ is a general-purpose programming language. It was originally designed as an extension to C, and keeps a similar syntax, but is now a completely different language. Use this tag for questions about code (to be) compiled with a C++ compiler. Use a version specific tag for questions related to a specific standard revision [C++11], [C++17], etc.

Python is a dynamic, strongly typed, object-oriented, multipurpose programming language, designed to be quick (to learn, to use, and to understand), and to enforce a clean and uniform syntax. Two similar but incompatible versions of Python are in use (Python 2.7 or 3.x). For version-specific Python questions, please also use the [python-2.7] or [python-3.x] tags. When using a Python variant (Jython, Pypy, Iron-python, etc.) - please also tag the variant.