Web, domains and email
PHP
Abbreviation for PHP: Hypertext Preprocessor
In short and in plain language
PHP is a common programming language for the web. Programs written in it run on the server.
Many systems for websites and shops are written in it.
A maintained version on the web server matters for security. It also matters for whether all parts work together.
Definition
PHP is a widely used programming language for web applications that runs on the server. Many content management systems and shop systems are written in PHP. A maintained PHP version on the web server matters for the security and compatibility of a website.