WordPress is a free and open-source content management system (CMS) based on PHP and MySQL. WordPress is installed on a web server, which either is part of an Internet hosting service or is a network host itself.
Joomla is a free and open-source CMS for publishing web content. It is built on a model–view–controller web application framework.It is written in PHP, uses OOP techniques and stores data in a MySQL.
Hyper Text Markup Language
HTML, is the standard markup language used to create web pages.HTML is a cornerstone technology used to create web pages,as well as to create user interfaces for mobile and web applications.
Cascading Style Sheet
CSS is a style sheet language used for describing the presentation of a document written in a markup language. Although most often used to set the visual style of web pages and user interfaces written in HTML and XHTML.
Programming makes computers do what you want them to do.
Bootstrap is a free and open-source front-end web framework for designing websites and web applications. It contains HTML- and CSS-based design templates for typography, forms and other interface components.
HyperText Pre Processor
PHP is a server-side scripting language designed for web development but also used as a general-purpose programming language.The standard PHP interpreter, powered by the Zend Engine, is free software released under the PHP License.
In a nutshell, it is the use of the XMLHttpRequest object to communicate with server-side scripts. It can send as well as receive information in a variety of formats, including JSON, XML, HTML, and even text files.