PHP stands for Hypertext Preprocessor and is an open source, general-purpose server-side scripting language that is especially suited for web development and can be embedded into HTML. It is one of the first developed server-side scripting languages to be embedded into HTML. When you'll surf through the Internet, you'll notice millions of pages with an extension “.php” because PHP pages are a common part of web applications and are one of the most popular web application languages used by developers worldwide. Its scope is clearly defined by its simplicity. Most of CMS softwares run on PHP.