PHP is a scripting language embedded in HTML that adds functionality and the ability to generate responses on demand to static pages, making it a great tool for ecommerce. PHP is almost as ubiquitous on the web as HTML and is present in 82.9% of websites that use a server-side programming language.
A markup language developed specifically for displaying applications and web pages in web browsers. Although HTML tells the browser what to display, it does not specify visual design elements such as fonts, colors, and other design elements. These are controlled by cascading style sheets or CSS.