PHP is a server-side scripting language designed primarily for web development but also used as a general-purpose programming language.
PHP is like the machinery behind a dynamic website. PHP (Hypertext Preprocessor) is a general purpose scripting language that became the de facto server-side language of choice for web developers since 1995. Today, a majority of sites on the web run on PHP, due in large part to its popularity as the language of choice for back-end of content management systems (CMS) like WordPress, Drupal, and Joomla. Whether it’s for a simple blog or a small business owner looking to set up a professional landing page, a CMS is usually the quickest, cheapest way to set up an online presence, so PHP developers are often in high demand.
A PHP script will be linked to from an HTML file, which serves as the foundation of a site. It’s also most commonly known as the P in the LAMP software stack.
PHP is free and offered under an open source license.