A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question:
PHP is a general-purpose programming language that is especially suited for web development.
CSS (Cascading Style Sheets) is a style sheet language used for describing the look and formatting of HTML (Hyper Text Markup Language) and XML (Extensible Markup Language) documents including (but not limited to) colors, layout, and fonts.
HTML (HyperText 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.
Bootstrap is a front-end framework designed to kick-start development of Web apps and sites. The current version of Bootstrap is v3.3.6. For questions related to a version of Bootstrap also use the specific version's tag from "twitter-bootstrap-2", twitter-bootstrap-3 and twitter-bootstrap-4 tags.
CakePHP is a free, open-source, rapid development framework for PHP. It’s a foundational structure for programmers to create web applications. Our primary goal is to enable you to work in a structured and rapid manner–without loss of flexibility.
Zend Framework is an open source, object-oriented web application framework implemented in PHP 5 and licensed under the New BSD License. Zend Framework applications can run on any PHP stack that fulfills the technical requirements.